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data:
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data:
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cid: uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=catalog/40
data:
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cid: uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=parts-and-components
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data:
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cid:
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data:
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cid:
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data:
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cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/administrator/components/com_jnews/includes/openflashchart/tmp-upload-images/log.phtml?rf

data:
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cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=taxonomy/term//administrator/components/com_jnews/includes/openflashchart/tmp-upload-images/log.phtml?rf

data:
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cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/administrator/components/com_acymailing/inc/openflash/tmp-upload-images/log.phtml?rf

data:
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cid:
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data:
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cid:
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data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=uno_driver_installation&fb_locale=pt_BR

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=user/register&destination=node/36%23comment-form

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=motor-shield-tutorial/RK=0/RS=KoMRi5Qu47oL50xIjPEfITLkxeo-

data:
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cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=uno_driver_installationCachedSimilarThis

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=http://vip-pujcka.cz/%3Fp=111/%20p%C5%AFj%C4%8Dka%20na%20sm%C4%9Bnku%20ihned%20nevad%C3%AD%20Existuj%C3%AD%20nebankovn%C3%AD%20p%C5%AFj%C4%8Dky%20do%2024%20hodin%20bez%20dokazov%C3%A1n%C3%AD%20p%C5%99%C3%ADjmu

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q%3Ddocumentations/wiring-up-dht11-temp-humidity-sensor-to-your-arduino

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/sites/default/files/NetSensor/javascript/undefined

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=web-switch-tutorial/RK=0/RS=78LR_n5a51CuMfCO8UA5dE9XTiM-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/document.getElementsByTagName("script")[0];s.parentNode.insertBefore(ga,

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=android-in-app-pairing-bluetooth/RK=0/RS=8pGBJ361fsdh1lM1VZDxq4n5SXo-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=web-switch-tutorial/RK=0/RS=c0H1Myv_f_jh.xMKlDE._XPbe7o-

data:
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cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=taxonomy/term/44/RK=0/RS=hTEH7qB0V_gHRH_JWtrnCX2e9p0-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=documentations/wiring-up-dht11-temp-humidity-sensor-to-your-arduino/RK=0/RS=QZRJmcMk4_0Cn9D9qMSsll.P2Ro-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=web-switch-tutorial/RK=0/RS=MppkaWaLArw64O4kEA2YPi0KSoQ-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=web-switch-tutorial/RK=0/RS=IiaNTwC4AToM1pHI1h5gDRphffA-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=web-switch-tutorial/RK=0/RS=5vRqx5IawhTppcy7UYb.f2FSHDg-

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=parts-and-components&page=1&order=title&sort=desc

data:
[cell repeats an earlier one in this file: 1479 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=documentations/booting-up-the-weather-station

data:
[cell repeats an earlier one in this file: 1464 characters]


cid:
  uc_catalog:catalog:marinelli:r.1:http://www.hobbyist.co.nz/?q=interface-sd-card-module-to-mega-sensor-shield

data:
[cell repeats an earlier one in this file: 1464 characters]


# watchdog

type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=bump-sensor-dht22-oled-and-arduino
hostname: 54.237.191.9
variables:
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type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=bump-sensor-dht22-oled-and-arduino
hostname: 54.237.191.9
variables:
  a:6:{s:5:"%type";s:7:"Warning";s:8:"!message";s:136:"Cannot modify header information - headers already sent by (output started at /home/hobbyist/hobbyist.co.nz/includes/bootstrap.inc:1193)";s:9:"%function";s:21:"drupal_send_headers()";s:5:"%file";s:52:"/home/hobbyist/hobbyist.co.nz/includes/bootstrap.inc";s:5:"%line";i:1044;s:14:"severity_level";i:4;}


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=documentations/booting-up-the-weather-station
hostname: 98.195.239.167
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
      [:db_condition_placeholder_1] =&gt; 1400609979
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/magda-alonso-sanchez/379037
hostname: 180.76.5.23
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
      [:db_condition_placeholder_1] =&gt; 1400610329
  )
  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}


type: boost
message: Expired %count stale files from static page cache.
variables: a:1:{s:6:"%count";i:0;}
location: http://www.hobbyist.co.nz/?q=3-axis-accelerometer
hostname: 143.107.98.165
referer:
  http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&ved=0CG4QFjAN&url=http%3A%2F%2Fwww.hobbyist.co.nz%2F%3Fq%3D3-axis-accelerometer&ei=ZZ57U4ywCZabqAa__YLIDA&usg=AFQjCNE_py7BAlPWZRIHMFC0CAFCfXp0Lg&sig2=ZT4bujEXOenu6VrLp6eW6A&bvm=bv.67229260,d.b2k


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=3-axis-accelerometer
hostname: 143.107.98.165
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
      [:db_condition_placeholder_1] =&gt; 1400610423
  )
  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
  http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&ved=0CG4QFjAN&url=http%3A%2F%2Fwww.hobbyist.co.nz%2F%3Fq%3D3-axis-accelerometer&ei=ZZ57U4ywCZabqAa__YLIDA&usg=AFQjCNE_py7BAlPWZRIHMFC0CAFCfXp0Lg&sig2=ZT4bujEXOenu6VrLp6eW6A&bvm=bv.67229260,d.b2k


type: boost
message: Expired %count stale files from static page cache.
variables: a:1:{s:6:"%count";i:0;}
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 2.100.84.170
referer:
  http://search.aol.co.uk/aol/search?s_chn=hp_t2&enabled_terms=&s_it=aoluk-homePage52&q=connections+on+1602A+lcd


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 2.100.84.170
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
      [:db_condition_placeholder_1] =&gt; 1400610562
  )
  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
  http://search.aol.co.uk/aol/search?s_chn=hp_t2&enabled_terms=&s_it=aoluk-homePage52&q=connections+on+1602A+lcd


type: boost
message: Expired %count stale files from static page cache.
variables: a:1:{s:6:"%count";i:0;}
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 2.100.84.170
referer:
  http://search.aol.co.uk/aol/imageDetails?s_it=imageDetails&q=connections+on+1602A+lcd&s_chn=hp_t2&v_t=aoluk-homePage52&b=image%3Fs_chn%3Dhp_t2%26enabled_terms%3D%26s_it%3Daoluk-homePage52%26q%3Dconnections%2Bon%2B1602A%2Blcd%26oreq%3Dabea24a8d45c495bb528a4bd15ec1fc0&img=https%3A%2F%2Flh5.googleusercontent.com%2FDytKgX2m8e3P0n5ssdi7ZuNdWASx1aBd4yR0Lrn4vnQd9hSjXV39Cl0a7bNSTlf--nVkKpiIOvPE1puF5dWFkMGgv9ARAszcRhxc4cztr5oWiGCovg&host=http%3A%2F%2Fwww.hobbyist.co.nz%2F%3Fq%3Ddiy-tutorials&width=109&height=36&thumbUrl=http%3A%2F%2Ft1.gstatic.com%2Fimages%3Fq%3Dtbn%3AANd9GcQiA1I3BxuVrVXOOAxhG3JzHV1nHjB_EmoSQsQDnMPF8fSQDEw_HIRcaCg1&imgWidth=1990&imgHeight=653&imgSize=133504&imgTitle=connections+on+1602A+lcd


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 2.100.84.170
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
      [:db_condition_placeholder_1] =&gt; 1400610612
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
  http://search.aol.co.uk/aol/imageDetails?s_it=imageDetails&q=connections+on+1602A+lcd&s_chn=hp_t2&v_t=aoluk-homePage52&b=image%3Fs_chn%3Dhp_t2%26enabled_terms%3D%26s_it%3Daoluk-homePage52%26q%3Dconnections%2Bon%2B1602A%2Blcd%26oreq%3Dabea24a8d45c495bb528a4bd15ec1fc0&img=https%3A%2F%2Flh5.googleusercontent.com%2FDytKgX2m8e3P0n5ssdi7ZuNdWASx1aBd4yR0Lrn4vnQd9hSjXV39Cl0a7bNSTlf--nVkKpiIOvPE1puF5dWFkMGgv9ARAszcRhxc4cztr5oWiGCovg&host=http%3A%2F%2Fwww.hobbyist.co.nz%2F%3Fq%3Ddiy-tutorials&width=109&height=36&thumbUrl=http%3A%2F%2Ft1.gstatic.com%2Fimages%3Fq%3Dtbn%3AANd9GcQiA1I3BxuVrVXOOAxhG3JzHV1nHjB_EmoSQsQDnMPF8fSQDEw_HIRcaCg1&imgWidth=1990&imgHeight=653&imgSize=133504&imgTitle=connections+on+1602A+lcd


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 2.100.84.170
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
[cell repeats an earlier one in this file: 707 characters]


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=arduino-to-oled-display
referer: https://www.google.ru/
hostname: 94.26.196.19
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
  WHERE  (expire &lt;&gt; :db_condition_placeholder_0) AND (expire &lt; :db_condition_placeholder_1) ; Array
  (
      [:db_condition_placeholder_0] =&gt; 0
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}


type: boost
message: Expired %count stale files from static page cache.
variables: a:1:{s:6:"%count";i:0;}
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 83.34.120.251
referer:
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type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=diy-tutorials
hostname: 83.34.120.251
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
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      [:db_condition_placeholder_0] =&gt; 0
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
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type: boost
message: Expired %count stale files from static page cache.
variables: a:1:{s:6:"%count";i:0;}
location: http://www.hobbyist.co.nz/?q=bluetooth-module-device
hostname: 203.106.158.98
referer:
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type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=bluetooth-module-device
hostname: 203.106.158.98
variables:
  a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:300:"SQLSTATE[HY000]: General error: 11 database disk image is malformed: DELETE FROM {cache_block} 
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  ";s:9:"%function";s:17:"cache_clear_all()";s:5:"%file";s:48:"/home/hobbyist/hobbyist.co.nz/includes/cache.inc";s:5:"%line";i:170;s:14:"severity_level";i:3;}

referer:
  http://www.google.com.my/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0CEcQFjAE&url=http%3A%2F%2Fwww.hobbyist.co.nz%2F%3Fq%3Dbluetooth-module-device&ei=9597U6KKOIzg8AXB3oAg&usg=AFQjCNFLsfOPGlvtx9a78TaD02Ri5vs8Bg&bvm=bv.67229260,d.dGc


type: php
message: %type: !message in %function (line %line of %file).
location: http://www.hobbyist.co.nz/?q=how-to-use-l298-motor-controller
hostname: 85.74.120.46
variables:
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# taxonomy_term_data

name: Arduino
format: plain_text
description:
  What is an Arduino? 
  Its a mini computer, which you can program using C. The learning curve is small and one can easily get the first working program running in a matter of minutes. ( A variety of code examples are included in the CD) 


# menu_custom

menu_name: navigation
title: Navigation
description:
  The <em>Navigation</em> menu contains links intended for site visitors. Links are added to the <em>Navigation</em> menu automatically by some modules.


menu_name: main-menu
title: Main menu
description:
  The <em>Main</em> menu is used on many sites to show the major sections of the site, often in a top navigation bar.


# rdf_mapping

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# search_dataset

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data:
   weather station tutorial weather station step 1 lcd pinout and getting it going with the arduino step 2 wiring up dht11 temp humidity sensor to the arduino step 3 booting up the weather station  


type: node
data:
   arduino uno windows 7 usb driver installation this article shows how to install the usb driver for the arduino uno in windows 7 when it is plugged into the computer for the first time what you found from the window device manager is that there is an arduino uno device double click the unknown arduino uno device a property window pops up choose the driver tab and select update driver go to the arduino ide also known as the arduino software directory and select the drivers direction then click ok do a final check to make sure the driver has been correctly installed arduino uno windows 7 usb driver installation  usb driver installation  


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data:
   motor shield tutorial   what is a arduino motorshield  this arduino motor shield is built upon the l298 dual channel hbridge ic with a maximum dc current of 2 a for each channel this current rating is sufficient for most home made medium size robots it has 3 different power operating modes based on the positions of the jumpers when plugged into an arduino board the power supply mode selection jumper allows you to choose how the motor shield and the arduino are powered  modes of operation    mode 1 pwrin vin this mode is to short both the pwrin and vin which is the most commonly used configuration in this mode only one power source is needed to connect to the motor shield which also supplies power to the arduino underneath the power source should be kept between 65 12 v  mode 2 vin only in this mode both of the jumpers are on vin as shown in the figure below this mode actually lets the motor shield to get the power from the arduino which means the arduino board has to be powered up by a centerpositive power jack again the voltage level should be 65 12 v  mode 3 pwrin only in some applications you may wish to keep the power sources of the motor shield and the arduino separate this requires both jumpers to sit on the pwrin as shown in the figure below a good reason to keep the power sources separate is when the motor shield needs to supply large current and there are substantial noise while controlling the current through pwm if both the analog and the digital share the same power source in the event of current surge the voltage level can drop suddenly and hence the microcontroller can make wrong decisions better digital signal integrity is obtained if the analog and digital power supply are kept separate but remember they should have a common ground in this mode the voltage range to the motor shield is 48 24 v and to the arduino is 6512v after selecting the power mode the rest of the work is quite straightforward and pretty much selfexplanatory connect the first motor to m1 and m1 and the second motor to m2 and m2 the motor can be controlled through pwm pulse width modulation or pll phase locked loop by placing the jumpers in the control mode selection programming the arduino once all the wires are hooked up you are ready to download the  example code  to test the motor shield the code should work on any arduino compatible boards and in particular we have tested it on arduino duemilanove 2009 and arduino mega 1280 make sure you have your external power source connected because the usb cable alone will be most likely not able to supply the current for the dc motors from arduino ide after plugging in the usb cable double check if the correct board is selected from tools boards and the correct serial port is selected from tools serial port upload the program once you are happy with the settings open the serial monitor press e and enter on the keyboard your motors should be turning and the serial monitor should display go  how to control the robot if that s the case congratulations you have got the motor shield going the s f c keys control the motors to turn in different directions and the d key is to stop play with it the direction of the motor may appear opposite to what you want if this is the case you may either need to swap the polarity of the motor or swap the high and low logic in the code if you still need some more references for the motor shield you may download the  manual   step2 test the bluetooth module   motor shield tutorial robotank robotics  motor shield tutorial step1 hook the motor shield  


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   terminator the terminator is a low cost and easy to use robotic kit it includes  terminator chassis dual channel motor controller arduino duemilanove usb cable aa x 4 battery case some wires for connections no soldering is required the terminator shown in the photos here uses the arduino demilanove can be replaced with uno with no change in functionality or code the pin out of the motor controller is depicted in the photo below blutack is used to fix the electronics on the chassis ok now it s time to wire the electronics up first of all connect the battery case to the acc red and gnd black of the controller then use the provided wires connect the controller to the arduino according to the table below motor controller arduino 5 v 5 v gnd gnd 1 pin 5 2 pin 6 3 pin 9 4 pin 10 note the reason why the arduino pin 56910 are chosen is because they all support pwm which is needed for motor speed control using analogwrite in the code note that the gnd of the controller needs to be shared with the arduino and the battery case photo below shows the controller signals and power pins being connected to the arduino for testing no battery is needed or the battery case can be left at the off position plug the arduino to the pc via a usb cable and down load this example code to the arduino switch on the serial monitor and send the key e and press enter the terminator should be turning play with the code and change anything you want it is much easier to control the terminator using the putty serial com interface instead of the arduino serial monitor because in putty you don t need to press the enter key every time you send a command  how to make the terminator go wireless  to make the terminator go wireless all you need is a bluetooth module  no modification is needed for the arduino code since the arduino only receives and sends data through its serial port it doesn t even know and doesn t care whether the serial port is a bluetooth or a cable connecting directly to the computer photo above shows a wireless terminator the led on the bluetooth stays on indicting the wireless connection has been established the terminator is ready for action there is a detailed tutorial on  how to connect the bluetooth module to the arduino  see that for more details to interface the bluetooth module motor controller terminator wireless bluetooth  this tutorial  


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   step 1 making the led lights dance to your music objective here is to use the a d converter on arduino to read input sound and light up a set leds to reflect the level of the sounds volume the leds are controlled from digital pins 3 4 56 they are turned on based on what the level of input is from the analog  pin which is connected to the headphone jack parts 1x arduino 4x leds 4x 390 ohm resistors 1x 10k trimpot 1x headphone jack 1x 10uf capasitor   led light dance define soundpin 8 reads the power from the light sensor from analog input  define led1 3 4 leds led s on digital output pins 3456 define led2 4 define led3 5 define led4 6 int sound void setup initialize the serial communications serialbegin 9600 provide power by using the analog inputs as normal digital pins pinmode soundpin input pinmode led1 output pinmode led2 output pinmode led3 output pinmode led4 output void loop sound analogread soundpin this samples the sound constantly if sound 200 digitalwrite led1 high set the leds on digitalwrite led2 high digitalwrite led3 high digitalwrite led4 high else if sound 150 digitalwrite led1 high set the led on digitalwrite led2 high digitalwrite led3 high digitalwrite led4 low set the led off else if sound 100 digitalwrite led1 high set the led on digitalwrite led2 high digitalwrite led3 low set the led off digitalwrite led4 low else if sound 50 digitalwrite led1 high set the led on digitalwrite led2 low set the led of f digitalwrite led3 low digitalwrite led4 low else digitalwrite led1 low set the leds off digitalwrite led2 low digitalwrite led3 low digitalwrite led4 low serialprintln soundpin output for serial monitor delay 25 and a shot delay links to projects that helped with getting this project working http wwwinstructablescom id vumeter    http arduinoartscom 201108 uvmeter    next step interfacing relay modules to arduino led christmas lights dancing lights  step 1 making led lights dance your music previous step making led lights dance your music  


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data:
   step 3 weaving the relay modules with the dancing lights  to connect the 4 relay board to an arduino is very easy you only need to connect the arduino 5v to the 4 relay board vcc pin and an arduino ground to the 4 relay board gnd pin then it s a matter of just connecting some data pins from the arduino to the 4 relay board in pins in the example code below i used arduino pins 7 8 9 10 i didn t use the same digital pins as the leds because they are inversed to each other the leds get power from the arduino that means when the digital pin is high 1 it has 5v on the line and the led lights up the relay commands are the opposite to this and the relay is switched with the in pin is set low  the relays default state is to connect com to nc normally closed this is also done by setting the relays in pin high this is a safety feature incase you arduino looses power it turns off all the relay switches to change the relays state so no normally open the pin is set to low i have some 12v dc lights that i want to activate like leds as a vu meter to do that i connect the lights power line to the 4 relay board relay com connector and the line to the lights connects to the relays no connector the nc connect is left empty  example of connecting lights to the relays    relay controlled danceing lights based on code from http wwwinstructablescom id vumeter   define soundpin 8 reads the power from the light sensor from analog input  define led1 3 4 led s on digital output pins 3456 define led2 4 define led3 5 define led4 6 define relay1 7 4 digital pins on the arduino 78910 define relay2 8 these pins link to 4 relay board in pins 1234 define relay3 9 define relay4 10 define the sampling variable int sound arduino pin 13 led flash this goes on or off each time relays are updated int flash high void setup initialize the serial communications for diagnostic output serialbegin 9600 provide power by using the analog inputs as normal digital pins pinmode soundpin input pinmode led1 output pinmode led2 output pinmode led3 output pinmode led4 output pinmode relay1 output pinmode relay2 output pinmode relay3 output pinmode relay4 output pinmode 13 output void loop sound analogread soundpin   read current sound level  serialprintln sound send the value of the sound level to the serial port the above output will help to calibrate the the vu levels if your music is quieter below toggles the flash variable with a logical not operation  flash flash true 1 become false  and then reversed digitalwrite 13 flash loud level from viewing the serial log the max level is around 300 for me if sound 200 digitalwrite led1 high set the leds on digitalwrite led2 high digitalwrite led3 high digitalwrite led4 high digitalwrite relay1 low turns the relays on digitalwrite relay2 low digitalwrite relay3 low digitalwrite relay4 low else if sound 150 digitalwrite led1 high set the led on digitalwrite led2 high digitalwrite led3 high digitalwrite led4 low set the led off digitalwrite relay1 low turns the relays on digitalwrite relay2 low digitalwrite relay3 low digitalwrite relay4 high turns the relay off else if sound 100 digitalwrite led1 high set the led on digitalwrite led2 high digitalwrite led3 low set the led off digitalwrite led4 low digitalwrite relay1 low turns the relays on digitalwrite relay2 low digitalwrite relay3 high turns the relays off digitalwrite relay4 high else if sound 50 sound below this level will turn off all leds relays you can reduce this to have at least one led relay most of the time digitalwrite led1 high set the led on digitalwrite led2 low set the led off digitalwrite led3 low digitalwrite led4 low digitalwrite relay1 low turnset the relays on digitalwrite relay2 high turns the relays off digitalwrite relay3 high digitalwrite relay4 high else sound below 50 equals no leds relays on digitalwrite led1 low set the leds off digitalwrite led2 low digitalwrite led3 low digitalwrite led4 low digitalwrite relay1 high turns the relays off digitalwrite relay2 high digitalwrite relay3 high digitalwrite relay4 high delay 1000 wait a second between changes to help protect the relay other details  specification of 4 relay board  equipped with highcurrent relay ac250v 10a dc30v 10a support 5v voltage independent wiring in contact area safe and reliable standard interface that can be expanded in a variety of development boards equipped with screw holes for easy installation applicable to a variety of platforms including arduino avr arm size 7 x 49 x18 high cm  schematic diagram   more information about relays  http wwwkpsecfreeukcom components relayhtm  tips on working with ac power it is dangerous only work with ac if you really know what your doing it can kill  previous step interfacing relay modules to arduino   get yourself the dancing lights now   arduino relay 4 relay module christmas lights dancing lights  step 3 music plays and lights dance next step music plays and lights dance  


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   electronic and embedded systems for hobbyists we are physically located in ilam christchurch new zealand this store aims to supply electronic development boards at low price our products are the musthave building blocks for electronic robotic hobbyists or for someone who wants to use microcontrollers to bring their brilliant ideas to reality we exactly understand the low budget requirements when hobbyists are searching for partshere we are this store commits to supply you parts at the lowest price possible these are two things we do to save you money f la t shipping rate of 350   nationwide nz  no matter how many items you buy  f la t shipping rate is 350 nationwide and pickup is welcome we will beat it by 10   if you find any identical product that is sold in new zealand at a lower price  we will beat it by 10   our product range is constantly expanding more variety of parts development boards and combo kits will be introduced over time so please come back often to get the latest update of our catalog 


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   highlight test move the mouse along the picture to get more info of the components  click the power socket and check what happens  


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   arduino motor shield the arduino motorshield is the missing link for making a robot with the arduino this arduino motorshield allows you to connect 2 dc motors and have total control of them from the arduino it allows you to move each dc motor clockwise anticlockwise stall control motor speed this motor shield allows arduino to drive two channel dc motors it uses a l293p chip which deliveries output current up to 2a each channel the speed control is achieved through conventional pwm which can be obtained from arduinos pwm output pin 5 and 6 specs peak output current each channel non repetitive t 100ms 3a repetitive 80 on 20 off ton 10ms 25a dc operation 2a analog voltage input vin 6512v pwrin 4824v digital voltage input vd 5v 7v max max power dissipation 25w see  motor shield tutorial for details of how to use it  3400 arduino shields price 3400  


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   arduino protoshield mini breadboard 70 wires for beginners this is a must have it s so good value for money this protoshield we offer comes with a arduino compatible prototyping board mini breadboard and approx 70 pcs of breadboard wires it has everything you need to get started prototyping your circuit right away no soldering is required once the circuit is working and you want to make it permanent you can solder the components onto the prototyping board the prototyping board has heaps of very cool features to make prototyping on your arduino easy compatible with ng diecimila duemilanove and any arduinoclone in the classic shape and pinout reset button up top icsp header lots of gnd and 5v rails dip prototyping area makes it easy to add more chips soic prototyping area above usb jack for up to 14pin soic chip narrow medium or wide package two 3mm leds with matching resistors extra 6mm button  2800 arduino shields price 2800  


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   nokia color lcd shield for arduino for some applications a bit of color can make all the difference here you go this is colored version of the arduino lcd shield it comes with three push buttons on the topper for user inputs now you can run an interactive color application on the arduino taking the coolness to a new level  example code schematics pin outs this 132x132 mini color lcd is a perfect match for the portable application please be gentle with it and handle it with care this inexpensive lcd comes with a powerful white led backlight and a relatively simple serial interface frame dimensions   135x158  active display dimensions   12 x12  features  lcd logic 33v 23ma led backlight 7v 4050ma very bright full 4096 color display uses the epson s1d15g10 or philips pcf8833 controller we cannot guarantee which one you will receive please see jim lynch s tutorial below as to why  documents  latest  lpc2148  example code from sfe works with both controllers latest  atmega8 example  code from sfe works with epson controller interface tutorial  by jim lynch epson controller  datasheet sfe eagle library  has this part the  holy grail forum posting  for this nokia type lcd example  atmega32 code  thanks jimbo example  sam7p64 arm code  thanks again jimbo example  3d graphics project  on a pic example  atmega6441283216 code  care of  cathy example  pic 16f87x code  for ccs compiler thanks marcus example  pic 18f4550 usb  thanks francesco example  4096 color control  beautiful thanks loren blaney example  linux driver  thanks zsolt example  image converter  thanks jamie samayoa bitmap converter  thanks sebastian pin out use the numbering visible on the display connector  vccdigital 33v reset sdata sck cs vccdisplay 33v n c gnd led gnd led v 67v   4500 arduino shields price 4500  


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   mars rover robotic platform the mars rover platform is a robust and easily adjustable manually track drive chassis that is perfect for robotics hobbyists it has two dc motor builtin and it s already assembled a 6slot battery case is also included the height of the track wheels are adjustable dimension 245mm length x 225mm width x 74mm height the batteries are not included check out other products to get a arduino and motorshield to build a complete programmable platform specs provided by the manufacturer dimensions 245mm length x 225mm width x 74mm height adjustable height 74mm100mm ground clearance 21mm50mm operating voltage 72v operating current 160180 ma maximum speed 30 cm s speed can reach 42cm s at 12 v maximum climbing angle 30 maximum payload 75kg note the specs above should only used be as a reference performance of individual platform may vary due to manufacturing tolerance battery type and operating conditions    7900 robotics price 7900  


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   how to use l298 motor controller  this article explains how the 5 v and vcc of this motor controller work all motor contorller circuits have two voltage levels one is a high voltage typ 12 or 24 v that use as the motor supply voltage that is the voltage that drives the motors the other voltage level is typically a 5 v which powers the electronics of on the motor controller including the hbridge diodes and leds etc depending on the connection of the two jumpers j3 and j5 there are three operating modes of using this motor controller when working with this motor controller we strongly encourage you to check the voltage lines with a multimeter before connecting it to anything otherwise a faulty motor controller may damage the devices connecting to it mode 1 jumper j3 and j5 open circuit in this mode vcc is the motor supply voltage accepting a voltage range from 5 to 35 v when the supply voltage is connected the led d1 is off if the led is on the controller may be faulty the terminal 5 v is an input a 5 v power source is needed to connect to it in order to power the electronics of the controller mode 2 jumper j3 short circuit j5 open circuit in this mode vcc is the motor supply voltage accepting a voltage range from 7 to 35 v when the supply voltage is connected the led d1 is on the vcc voltage gets regulated to 5 v to power all the onboard electronics the terminal 5 v is an outputmeaning that it makes a 5 v power source available for other electronics that need it eg the arduino microcontroller board mode 3 jumper j3 open circuit j5 short circuit in this mode vcc is the motor supply voltage accepting a voltage range from 7 to 35 v when the supply voltage is connected the led d1 is on the vcc voltage gets regulated to 5 v to power all the onboard electronics the terminal 5 v is output but its voltage is equal to the vcc voltage so it on longer to be 5 v as labeled on the board this mode is not recommended to understand how to control the motors please see this tutorial where an example code is available  l298 motor controller  how use l298 motor controller  


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   arduino servo and sensor shield v50 you can easily connect with usual analog sensors by using this expansion board such as temperature sensor those 3way male pins allow you to connect servo motors everything is plug and play and it s designed to be arduino duemilanove compatible so all you need to do is to read the data from the sensors and output pwm to drive the servos by program in arduino this is the latest version of sensor shield in the market the major improvement over its predecessor is the power source this version provides an external power connector so you don t need to worry about overloading the arduino microcontroller while driving too many sensors and actuators  2800 arduino shields price 2800  


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   web switch turn on your kettle from the internet web switch control your kettle or any power appliance from the internet  this cool kit allows you to control any electric appliance from the internet what does that mean that means you can turn on off any appliance at your home from your iphone android ipad pc or laptop from anywhere in the world as long as you have access to a web browser woooo aint that an amazing power to lay your hands on kit contents   arduino ethernet shield    sensor shield relay module   completed kit looks like this  tutorial tutorial and source code video of working kit   9900 diy kits price 9900  get webswitch for yourself  


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   need a job  hobbyist is looking for enthusiasts who love building kits hobbyist sponsors and pays for all the kit and materials you get paid for having fun and building the kit work flexible hours in the comfort of your home you can suggest kits which you find cool we will pay you for building it how to start  tell us about yourself projects you have done if possible links to any of your published projects blog drop us a mail at contact hobbyistconz  with above information and you will pretty soon be building cool projects with hobbyist  


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   bluetooth module master  bluetooth module  master  this is the hc06 bluetooth module master it can talk to the hc06 bluetooth module device please note hc06 master can only connect to hc06 device the role of a hc06 bluetooth module master and a hc06 bluetooth device cannot be interchanged its defifined in its firmware which is proprietary the name of the master module cannot be changed and other commands are the same as the device module  once the master detects a slave module with the same paring code it will establish the connection and next time even after power down once the master module detect the same slave module it will automatically connect to it even other slave modules are also nearby the master module recognizes that specific slave module through it s mac number a master module that is mated with a slave module has a slow flashing led once connection established its led stays on to reset the mac number press the button on the master module or give the key wake pin a logic high impulse once it s reset and if there are more multiple slave modules in the vicinity with the same paring code the master module will randomly pick one to connect and will again lock into that module until the reset button is pressed   2300 wireless price 2300  


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   networked sensor see your sensor data on the internet the networked sensor is a kit which lets you put your sensors on the internet  networked sensor demo page applications  access the cool graphs from anywhere in the world remotely you can see              your gardens humidity level  home room temperature           buglar alarm status  real time power consumption smoke sensor water level monitor any other sensor you can think of you could easily add it to this kit kit contents   wiznet etherent shield arduino uno   temperature and humidity sensor digital  


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   lcd user interface kit this kit consists of an arduino uno and a black and white lcd shield being able to plug the lcd shield straight onto the aduino making this setup clean and easy to work with there is no wires hanging around this is a great kit for someone to start learning some lcd based user interface as on the shield it comes with a 5 degree of freedom joystick which makes it easy to write up menus and click on them as you go lcd shield give your project a wow factor last but not the least it allows you to debug your programme while its running this package includes  arduino uno lcd shield usb cable this demo sketch can get you started using this lcd shield the library can be downloaded from here  note this library doesn t work with arduino 10 software please use arduino software version 22 or 23 first unzipped the lcd4884librar then copy the subdirectory lcd4884 and paste it to the directory libraries under the arduino software directory then launch the arduino software files examples lcd4884 lcd4884menu  specification power supply 5v spi interface using arduino digital pin 23456 one reset button one 5 degree joystick using arduino analog pin  backlit control arduino dio pin 7   7300 diy kits price 7300  


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   infrared proximity sensor arduino infared proximity switch module is a reflectiontype photoelectric sensor which integrates transmitting and receiving infared beams function infrared proximity switches work by sending out beams of invisible infrared light a photodetector on the proximity switch detects any reflections of this light these reflections allow infrared proximity switches to determine whether there is an object nearby the trigger distance can be anywhere between 30 800mm by manual adjustment of the potentiometer in the sensor technical parameters voltage dc 5v current 100ma type dc 3 wire npnno normal open sensory distance 380 cm adjustable sensory distance regulator and output indicator light on product back control signal level high 23v vin 5v low 03v vin 15v ambient temperature 25 70 degree c guard mode reverse polarity protection sensor dimension 18mm diameter x 45mm length cable length 180mm example code int ledpin 13 choose pin for the led int inputpin 2 choose input pin for infrared sensor int val  variable for reading the pin status void setup pinmode ledpin output declare led as output pinmode inputpin input declare infrared sensor as input void loop val digitalread inputpin read input value if val high check if the input is high digitalwrite ledpin low turn led off else digitalwrite ledpin high turn led on   1500 sensors price 1500  


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   step 1 rfid lcd interface rfid kit step 1 wiring up the lcd below is the wiring diagram for connecting up a lcd screen  a buzzer and a button connecting of the lcd screen is the same the ladyada  wiring up a character lcd to an arduino  so i will not cover the ins and outs of that and just deal with the custom characters buzzer and the button we use custom characters to display a countdown bar each character is made up of 7 rows and 5 columns below is a representation of the custom characters used from full to blank a line of 16 full custom characters are printed to the lcd then one by one the last character on the display is replaced with the next custom character until it becomes blank and it moves onto reducing the next screen character position as each segment is removed pin 13 is changed from high to low or low to high causing the speaker to beep on the wiring diagram you can see i used a 200 ω resistor connected to the speaker so it s not too alarming to start the lcd count down you just put the button this button is wired up with a  hardware debounce  which consists of a 10k ω resistor and a 100nf ceramic capacitor hint if the count down starts right away without the button pressed double check the wiring of the button for all connections click to see larger image   lcd count down with button and beeper include liquidcrystal h initialize the library with the numbers of the interface pins liquidcrystal lcd 7 8 9 10 11 12 byte ch08 b11111 b11111 b11111 b11111 b11111 b11111 b111110 byte ch18 b11110 b11110 b11110 b11110 b11110 b11110 b111100 byte ch28 b11100 b11100 b11100 b11100 b11100 b11100 b111000 byte ch38 b11000 b11000 b11000 b11000 b11000 b11000 b110000 byte ch48 b10000 b10000 b10000 b10000 b10000 b10000 b100000 byte ch58 b00000 b00000 b00000 b00000 b00000 b00000 b000000 int beeper  beeper flag  off void setup pinmode 13 output door beeper pinmode a5 input button input lcd begin 16 2 set up the lcd s number of columns and rows lcd print lcd button test print startup message to the lcd serial begin 19200 serial debugging 19200 baud the speed the rfid card communicates at serial println serial ready lcd createchar  ch0 initialise our custom characters lcd createchar 1 ch1 lcd createchar 2 ch2 lcd createchar 3 ch3 lcd createchar 4 ch4 lcd createchar 5 ch5 end setup void loop boolean buttonstate digitalread a5 get button state buttonstate buttonstate invert button state to match logic if buttonstate true serial println buttonstate lcd setcursor  1 for int i  i 15 i print 16 block characters lcd print char  delay 100 for int i 15 i  i loop through the 16 characters in row for int c  c 5 c loop through the 5 places that make up a character beeper beeper digitalwrite 13 beeper turn beeper on or off lcd setcursor i 1 lcd print char c print our custom character delay 100 the delays add up to about 8 seconds that s how long the door lock will be open for digitalwrite 13  set beeper off end if button loop end mail loop  next step motorised lock control  previous step step 1 rfid lcd interface  


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   step 3 rfid door controller here we add the rfid module to what we have put together to date the rfid module communicates with its uart serial serial port to the arduino via the softwareserial library also on the rfid module is a signal pin when a rfid tag is within range 6cm max an led on lights up and the signal pin changes its state that change of state can be monitored by the arduino and so triggers other actions like reading the tag id commands are sent of through the software serial port to the rfid module the rfid module supports from 33v and 5v and it works at 1356mhz the integrated reader has a detection distance of up to 6cm at 5v the command and response data structure always start with the hex bytes xaa xbb the next byte contains the length of the command or data followed by the bytes of the command or data the last byte is a crc checksum of the bytes that make up the length and command or data rfid data format  head length command xor checksum aa bb 1 1 3 with the rfid serial port baud rate is set to 19200 a request read tag command is sent its format in hex is aa bb 2 20 22 5 bytes if for some reason there is no tags within the working area of rfid module then the rfid module responds with an error code aa bb 2 df dd 5 bytes the error code is the inverse of the command requested the read command is hex 20 and its inverse is df you can see this easier where you look at the binary 100000 inverse is 11011111  if there is a tag in range then the rfid module reponds with the tags id ie aa bb 6 20 5e 97 25 c7 0d 9 bytes 5e 97 25 c7 is the tag id below are two programs for the arduino the first is used to find out what the tag id values are and the second uses those tag id values to activate the door lock click to see larger image the 5 wiring for the rfid module rfid module arduino ground black ground 5v red 5v signal yellow digital pin 5 serial tx blue digital pin 3 serial rx green digital pin 2 the code below is used to read the rfid tag ids these will be displayed on the lcd and via the serial monitor include softwareserialh include liquidcrystal h define rxpin 3 define txpin 2 softwareserial rfid rxpin txpin softwareserial rxpin txpin initialize the library with the numbers of the interface pins liquidcrystal lcd 7 8 9 10 11 12 define ledpin 13 rfid tag present 1 no  yes int tagthere 1 int readingtag  prevents multipul reads of the same tag command to read rfid tag unsigned char cmd xaa xbb x02 x20 x22 define array for the response byte response 32 void setup set up the lcd s number of columns and rows lcd begin 16 2 print a message to the lcd lcd print rfid reader serial begin 19200 serial println serial ready rfid begin 19200 serial println rfid ready pinmode 5 input input from rfid module tag in range end setup main loop void loop lcd setcursor  1 tagthere digitalread 5 look at rfid card to see if a tag is in range 1 no tag true  tag found false if tagthere  lcd print tag readingtag 1 readtag response read the tag id into response serial print response  hex check response bytes  1 aa bb serial println response 1 hex serial println response 2 hex the size of response byte 2 serial println response 3 hex the command byte 3 if this byte is the invert of the command sent then it s a error 1s complement of the command 20 if read or df if error serial print response 4 hex start of tag id number the data returned byte 4 byte 4 byte 2 1 serial print response 5 hex serial print response 6 hex serial print response 7 hex serial println response 8 hex serial println response 9 hex aabb 2 df dd0000  error reading tag aabb 6 20 6cd01e54d0  tag read my test tag number if response 3 x20 was read ok if so loop through the id number displaying it to the lcd for int rfidkey 4 rfidkey 4 response 21 rfidkey lcd print response rfidkey hex else lcd println readingtag  delay 200 end main loop send the read command to the rfid care and then read the response void readtag byte readdata 32 rfid write cmd 5 xaa xbb x02 x20 x22 send command to read rfid card delay 100 wait for it to process int index  while rfid available  read in result byte val rfid read read a char readdata index val index end read tag hint if the lcd shows only tag but no id the rx and tx may be connected the other way round or the like the actually circuit may look something like this below is the code use to read and rfid tag and if it s the right one will open the lock note the line  byte thekey x6c 0xd00x1e 0x540xd0  the numbers in red is the rfid tag id key that we got from the previous program you will need to change this to match your rfid tags id number include softwareserialh include liquidcrystal h initialize the library with the numbers of the interface pins liquidcrystal lcd 7 8 9 10 11 12 byte ch08 b11111 b11111 b11111 b11111 b11111 b11111 b111110 byte ch18 b11110 b11110 b11110 b11110 b11110 b11110 b111100 byte ch28 b11100 b11100 b11100 b11100 b11100 b11100 b111000 byte ch38 b11000 b11000 b11000 b11000 b11000 b11000 b110000 byte ch48 b10000 b10000 b10000 b10000 b10000 b10000 b100000 byte ch58 b00000 b00000 b00000 b00000 b00000 b00000 b000000 setup softwareserial define rxpin 3 define txpin 2 softwareserial rfid rxpin txpin digital pins the lock uses define motor0 4 define motor1 6 int beeper  beeper flag  off char c o rfid tag present 1 no  yes int tagthere 1 int readingtag  prevents multipul reads of the same tag command to read rfid tag unsigned char cmd xaa xbb x02 x20 x22 byte response 32 define array for the response  command to read rfid tag unsigned char cmd xaa xbb x02 x20 x22   our rfid key discovered from reader program byte thekey x6c 0xd00x1e 0x540xd0  void setup lcd begin 16 2 set up the lcd s number of columns and rows lcd print rdfidoor control lcd createchar  ch0 initialise our custom characters lcd createchar 1 ch1 lcd createchar 2 ch2 lcd createchar 3 ch3 lcd createchar 4 ch4 lcd createchar 5 ch5 serial begin 19200 for serial debugging 19200 baud as that s the speed the rfid card works at serial println serial ready rfid begin 19200 serial println rfid ready pinmode motor0 output set lock motor pins to output pinmode motor1 output pinmode 5 input input from rfid module tag in range pin pinmode 13 output door beeper pinmode a5 input button input using as a digital pin end setup main loop void loop boolean buttonstate digitalread a5 get button state buttonstate buttonstate invert button state to match logic boolean rfidtagpresent digitalread 5 test if a rfid tag is present digitlpin 5 rfidtagpresent rfidtagpresent if buttonstate true serial print button pressed openlock if button loop else if rfidtagpresent true serial print rfid tag present read rfid tag readtag response read the tag id into response if response 3 x20 was read ok if so loop through the id number displaying it to the lcd int keyinvalid  for int therfidkey  therfidkey response 21 therfidkey if thekey therfidkey response therfidkey 4 keyinvalid if wrong keyinvalid is not zero if keyinvalid  openlock else lcd print key invalid end loop void readtag unsigned char readdata 32 void readtag byte readdata 32 rfid write cmd 5 xaa xbb x02 x20 x22 send command to read rfid card delay 100 wait for it to process int index  while rfid available  read in result byte val rfid read read a char readdata index val index void openlock digitalwrite motor0 low open lock digitalwrite motor1 high delay 500 length of time for lock to fully opening digitalwrite motor0 low stop motor digitalwrite motor1 low lcd setcursor  1 for int i  i 15 i print 16 block characters lcd print char  delay 100 for int i 15 i  i loop through the 16 characters loop through the 5 colums that make up a character for int c  c 5 c beeper beeper digitalwrite 13 beeper turn beeper on or off lcd setcursor i 1 lcd print char c print our custom character delay 100 the delays add up to about 8 seconds that s how long the door lock will be open for digitalwrite 13  set beeper off digitalwrite motor0 high close lock motor digitalwrite motor1 low delay 500 digitalwrite motor0 low stop lock motor digitalwrite motor1 low end open lock ending notes above is a basic look at working with rfid module but is can do so much more and so here is a collection of notes that i collected when developing this project have a look at this pdf if you would like to know more about working with the rdif reader writer pin definitions of rfid card module  pin symbol io type description arduino or notes j11 rxd i o uart receiver serial link to arduino pin 2 j12 txd i o uart transmitter serial link to arduino pin 3 j13 out1 i o output 1 j14 out2 i output 2 j15 rst i reset activelow floating for poweron reset by default j16 buz i buzzer output high level drive could be for different model j17 sig o interrupt output low level indicates card in the field arduino digital pin 5 j18 vcc power power positive to 5v 3v3 can be used but has a smaller field range j19 gnd gnd power negative to gnd   previous step  next step step 3 rfid door controller this page  


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   step 2 motorised lock control the lock control is handled by a motor controller  this builds on what we have built so far the button press now opens the lock then does the count down and closes the lock arduino sends instructions to the motor controller via the arduinos digital pins 4 and 6 to the motor controllers pins in3 and in4 d4 d6 to left to pins of in3 in4 action 1   high low motor turns clockwise  1  low high motor turns anticlockwise 1 1  high high motor breaks    low low motor is free arduino connects its 5v to motor controller 5v and the ground to ground the lock connector contains the power to drive the lock it s ground line also connects to the motor controllers ground the locks power line connects to the motor controllers vcc the next two pins are the locks motor and these connect to the motor controller pins out0 and out 1 there is also two more pins on the lock connection a mont pin that is 0v when the locks latch is closed and v when the locks latch is open i currently don t test this the last pin is to a setter switch it s like a reset button this is on the lock and does something with original controller but i don t use it it reports 0v when no pushed and v when pressed click to see larger image above you can see the wiring needed to connect the lock motor the actual circuit may look something like this there are two bits of code added to control the lock when the button is pressed below opens the lock digitalwrite motor0 low open lock digitalwrite motor1 high delay 500 time for lock to open fully digitalwrite motor0 low stop motor digitalwrite motor1 low below closes the lock digitalwrite motor0 high close lock motor digitalwrite motor1 low delay 500 digitalwrite motor0 low stop lock motor digitalwrite motor1 low include liquidcrystal h define motor0 4 digital pins the lock uses define motor1 6 initialize the library with the numbers of the interface pins liquidcrystal lcd 7 8 9 10 11 12 byte ch08 b11111 b11111 b11111 b11111 b11111 b11111 b111110 byte ch18 b11110 b11110 b11110 b11110 b11110 b11110 b111100 byte ch28 b11100 b11100 b11100 b11100 b11100 b11100 b111000 byte ch38 b11000 b11000 b11000 b11000 b11000 b11000 b110000 byte ch48 b10000 b10000 b10000 b10000 b10000 b10000 b100000 byte ch58 b00000 b00000 b00000 b00000 b00000 b00000 b000000 int beeper  beeper flag  off void setup pinmode 13 output door beeper pinmode a5 input button input we are using as a digital pin pinmode motor0 output set lock motor pins to output pinmode motor1 output lcd begin 16 2 set up the lcd s number of columns and rows lcd print lock test print startup message to the lcd serial begin 19200 for serial debugging 19200 baud because serial println ready that s the speed the rfid card works at lcd createchar  ch0 initialise our custom characters lcd createchar 1 ch1 lcd createchar 2 ch2 lcd createchar 3 ch3 lcd createchar 4 ch4 lcd createchar 5 ch5 end setup void loop boolean buttonstate digitalread a5 get button state buttonstate buttonstate invert button state to match logic if buttonstate true serial println buttonstate digitalwrite motor0 low open lock digitalwrite motor1 high delay 500 time for lock to open fully digitalwrite motor0 low stop motor digitalwrite motor1 low lcd setcursor  1 for int i  i 15 i print 16 block characters lcd print char  delay 100 for int i 15 i  i loop through the 16 characters for int c  c 5 c loop through the 16 characters places of the lcd screen beeper beeper digitalwrite 13 beeper turn beeper on or off lcd setcursor i 1 lcd print char c print our custom character delay 100 the delays add up to about 8 seconds that s how long the door lock will be open for end count down loop digitalwrite 13  set beeper off digitalwrite motor0 high close lock motor digitalwrite motor1 low delay 500 digitalwrite motor0 low stop lock motor digitalwrite motor1 low end if button loop end main loop   previous step   next step   next step motorised lock control step 2 motorised lock control previous step  


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   usb servo controller 16 channels this is a 16channel miniusb servo controller a miniusb cable is included ideal for 6 legged robots or similar it uses a 32bit processor fast response and stable operation usb interface can be directly interfaced to a pc selfdetect baudrate 9600 19200 38400 57600 115200 128000 example serialbegin 115200 set baudrate to be 115200 serialprint 1p1200t1000 r n turn channel 1 on at 1200 position for 1000ms serialprint 1p1200t10002p1600t1000 r n turn chanenl 1 and 2 simultaneously this is the tutorial to show how to use this servo controller modules price 4600  


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   how to use mini usb servo controller this tutorial details how to use the mini usb servo controller in windows 7 1 plug the mini usb to the computer and the two leds on led should turn on green and red 2 once the usb is plugged to a windows 7 pc the driver should be automatically installed confirm the com port the servo controller is connected to in device manager to go to device manager press the start button right click on computer and select properties then choose device manager on the top left corner 2 it should be noted that the usb doesn t supply any power to the servo since there are potentially 16 servos usb has no way of supply sufficient current for that so an external power source has to connect to the 5v and gnd screw terminals it doesn t have to be 5v you can connect whatever voltage you like to supply to the servos they normally tolerate up to 6v with the power supply the 3rd led will turn on 3 plug in servos brown is gnd and orange is signal 4 send command from pc terminal programs like putty is great if you want to send each character separately as you type on the keyboard but for the servo controller you better use a terminal program that can send a whole string when you press a button for example you can use the http arduinogooglecodecom files arduino101windowszip  arduino program open it and select the correct com from tools serial port 5 open on the serial monitor on the top right corner on the bottom of the serial monitor the baudrate doesn t matter but change the no line ending to both nl cr 6 in the serial monitor you can type command for example type 1p1200t1000 and hit send button will it send a 1200 us duty cycle pwm to channel 1 for 1000 ms if you like to control 2 servos simultaneously use the command 1p1200t10002p1200t1000 please note that normally the servo range is from 1000us 90 degree to 2000us 90 degree with 1500us being the neutral position usb servo controller  tutorial  


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   usb wall charger adapter usb wall charger 500ma nz aus plug it s great for any usb device and a good 5 v supply for electronics projects power source price 1400  


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   diy arduino weather station this is our original weather station kit you will be surprised how much you can learn from it such as how to connect sensors and write program to read the data and display it on a lcd display what you can do with this kit is only limited by your imagination all the wiring diagram and datasheet is available from our website we have include the source code in the tutorial to make sure that you can get it up and running once the components are hooked up for any of our products combined shipping is welcome the kit includes arduino uno usb cable arduino protoshield mini breadboard breadboard wires approx 70 pcs 1402 blue backlit lcd display photo transistor 3533 digital temperature and humidity sensor dht11 one potentiometer and some resistors its easy to add in more sensors like windspeed etc and customize it to do what you want tutorial for building the kit in 3 steps  lcd interfacing   sensor interfacing booting up the weatherstation tags  la crosse weather station data logger weather electronic weather station home weather station home weather station wireless wireless weather stations diy kits price 8000  


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   arduino mega 1280 protoshield combo this is the mega version of the protoshield combo the mega 1280 has much more capability than the arduino duemilanove 2009 it has got more on board memory more processing power and more i os with this kit prototyping with the mega will never be easier especially for beginners circuits can be tested on the breadboard once they are working they can be soldered onto the protoshield to be made permanent this kit includes arduino mega 1280 usb cable not shown in photo mega protoshield mini breadboard  ide with development software for windows linux mac and lots of code examples a bunch of breadboard wires not shown in photo the arduino mega clone specs powerful atmega1280 processor 128kb of flash 8kb ram 4kb eeprom 53 digital i o 14 pwm channels 16 analog inputs 4 uart channels spi interface i2c interface usb interface used for power supply programming a easy start to your first microcontroller project free source code and example available at  http wwwarduinocc  look here for fun projects you can do with this kit  http hacknmodcom hack top40arduinoprojectsoftheweb  support we are engineers and also hobbyists who passionately involve in embedded system and software projects these development boards are the best value kits to start your first microcontroller projects as part of the open source community we are more than happy to provide you with technical supports in regards to our products if needed warranty we also provide warranty for any defects in manufacturing feel free to get back to us if you have any issues diy kits price 7500  


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   bump sensor contact sensor end stop sensor this bump contact end stop sensor is great for automation systems 3d printers and robotics it comes with a connecting cable to make interface easy sensors price 700  


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   long range wireless transmitter 2km this pair of wireless modules operates in the 433mhz frequency band and the range can be up to 2 km it is very simple to use and can be a very cost effective solution for your long range wireless project a slight latency of about 5 second may be expected it s ideal for notrealtimecritical applications such as sending instructions to relays cameras and other sensors and actuators please note that the pair only does one way communication for applications where both way communication is needed two pairs may be used schematic  link to wiring schematic note  wire the tx strictly as mentioned in diagram above the data pins should only be connected to vcc or left floating please straighten the antenna before usage or the module will be burned  specification  working volt 5v working current 25ma 50vdc technology superhet vco pll modulation ook ask working band 43392mhz bandwidth 15mhz sensitivity 105dbm 50ω rate 5kbps decoding form pt2272 antenna length 18cm emission distance 2 km coupling the tx to rx module example wiring d0 pin4 d1 pin5 d2 pin6 d3 pin7 gnd gnd vdd 5v the data pins of the receiver will follow the logic level of the transmitter example code void setup pinmode 4 output pinmode 5 output pinmode 6 output pinmode 7 output serialbegin 9600 void loop unsigned char i  for i  i 16 i senddata i serialprint i serialprintln i dec delay 500 senddata  delay 500 void senddata unsigned char data digitalwrite 4 data x01 digitalwrite 5 data x02 digitalwrite 6 data x04 digitalwrite 7 data x08 schematic keywords fm transmitter transmitter fm transmitter wireless price 4900  


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   rfid reader module 1356mhz rfid module interfacing this module to arduino cannot be easier it s in ttl serial interface it can directly connect to rx and tx of the arduiono or to pin 2 and 3 and use softserial library it comes with two tags pins and stripped wires operating voltage 3 55 v sensing distance  40 mm pin definitions of rfid card module  pin symbol io type description arduino or notes j11 rxd i o uart receiver serial link to arduino pin 2 j12 txd i o uart transmitter serial link to arduino pin 3 j13 out1 i o output 1 j14 out2 i output 2 j15 rst i reset activelow floating for poweron reset by default j16 buz i buzzer output high level drive could be for different model j17 sig o interrupt output low level indicates card in the field arduino digital pin 5 j18 vcc power power positive to 5v 3v3 can be used but has a smaller field range j19 gnd gnd power negative to gnd see this page for tutorials of how to use this rfid module tags rfid reader what is rfid about rfid usb rfid reader what is rfid reader rfid a rfid rfid tags rfid rfid tags modules price 3500  rfid module  


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   gps 1 introduction and testing gps sd lcd modules introduction the gps kit shows varied uses of the arduino from displaying information on an lcd screen to saving data to an sd card as well as reading serial data from a gps module basically the gps module outputs location data directly to the arduino software serial in this is stored on an sd card and a single switch and lcd screen help provide an interface to the operation once data has been collected it can be uploaded to a computer from there it is displayed on a google map who is it for  general experimenters and tinkerers with a small amount of ability in electronics and software or ability to read and learn the kit uses the arduino hardware software platform but mostly it is plug and play  it requires a small amount of soldering to solder the header pins onto the lcd module and a little work to attach a 4 core cable to the small pads on the gps module  add image whole unit  required knowledge or google it tools  small amount of electronics knowledge which way round an led goes basic breadboard wiring etc   installed copy of arduino 10 101 or 102 etc from http arduinocc en main software  and understanding of the comm port the arduino hardware is attached to ability to install sketches and libraries into the arduino software ability to upload sketches to arduino board ability to read code to troubleshooting level procedure  rather than building the whole kit and testing it at once we will partbuild and test in stages stage 1  gps module wiring and test if you have a ftdi cable do the modules come with this you can connect the gps module directly to your computer with the usb connector you ll need a terminal program and or a gps program for your operating system plus drivers to connect softwarewise the usb data to the program not sure how to finish this off recommended program and drivers for windows linux win realterm gps diag ucenter pl 2303 usbserial driver with a terminal program you should be able to see raw gps data directly from the sensor if you can find a gps program this will present the data a little nicer in the pictures you can see the config for putty terminal program on linux and the raw data output stage 2  rewiring the gps module to connect to arduino 1 open the gps module desolder the existing cableif necessary and attach the 4 core cable to gnd 33v txa and rxa pads note which colour wires you attach to which pins 2 cut two of the shorter breadboard connecting wires with pins on the ends in half on the other end of this cable strip and attach a connect wire to each wire of the cable this allows you to plug each wire into the arduino headers easily use electrical tape or similar to insulate the connections in the picture below breadboard connect wires have been cut in half and soldered to the ends of the wires from the gps so that they can easily be plugged into arduino pins once you ve done this there is a 3rd way to test by connecting the gps to the arduino attach each wire to the appropriate header pins on the arduino a gnd from gps to gnd on arduino b 33v from gps to 33v on arduino c txa from gps to rx pin  on arduino d rxa from gps to tx pin 1 on arduino stage 3  create an arduino sketch   start sample arduino 10 sketch to test gps module data input run this sketch and open the serial monitor a data stream from the gps should be seen updating each second byte gpsdata void setup serialbegin 57600 void loop if serialavailable  if there is data coming into the serial line gpsdata serialread get data serialwrite gpsdata send it to the serial monitor end this sketch just reads straight from arduino rx pin and outputs it again the serial monitor can see this so once this sketch is uploaded to the arduino open the serial monitor make sure it is set to communicate at 57600 baud otherwise you ll get junk if all is well you should see lines of data being updated each second gps data  gpgsa a 3040509122425132139 gpgsv 210801400834602173084112073443914222284575 gprmc 123519 a 4807038 n 1131000 e 22408442303940031 w 6a what is this stuff well it s the core data for this kit nmea sentences which describe how many and which satellites have been found and importantly for us location data note that these gps modules may initially take a while to find and fix on satellites anywhere from 1 5 minutes as long as you see something coming out each second the module is probably working note that in line 3 after the 2nd comma here you see the character a for active this means the module has got a fix on some satellites if it is a v for void then a fix can t be acheived the module often needs to be outside to get a good signal this line also has the other data we want 4807038 n latitude 48 deg 7038 n 1131000 e longitude 11 deg 31000 e 224 speed over the ground in knots 844 track angle in degrees true 230394 date 23rd of march 1994 if line 3 gprmc is showing v then you probably won t see any coordinate or speed data you can find much more out about the meaning of the nmea data by going to  http wwwgpsinformationorg dale nmeahtm if you see this data this shows that the wiring to the gps module is correct and all your arduino setup is fine note that we will be using different arduino pins in the final setup stage 4  sd card shield test 1 attach the sd card shield to the arduino its pins just slot into the corresponding headers on the arduino board 2 make sure all pins have seated in the correct place 3 make sure power is not connected to the arduino plug in an sd or micro sd card note that this may not work with an sdhc card and also that it should be formatted as either fat16 or fat32 4 in the arduino software programme there is an example sketch under sd called readwrite which just writes data to a file on the card creatng the file if it doesn t exist change the cs pin to 10 or sdbegin 10 upload this and run it 5 open the serial monitor and you should see that data has been written to and read from the card 5 if you don t believe that this has done anything to the card you can disconnect power pull out the sd card and plug it into a card reader you should find a file called testtxt with testing 1 2 3 in it if the data looks correct then the arduino sd card shield are connected and working stage 4  lcd module soldering and test 1 take the header pins and place the long ends in a breadboard just to hold them steady you could also use a vice or a piece of thick cardboard anything to hold it all steady while soldering but avoid using polystyrene because there s a chance that static could damage the module 2 place the lcd module circuit board holes over the top of the pins so that they poke through the holes make sure they are aligned so that all 16 pin ends go into the 16 holes 3 solder the pin ends to the board you can solder just a couple to anchor them then unplug from the breadboard so you don t heat the breadboard up too much 4 now the lcd module header pins can be plugged back into the breadboard 5 remove the sd card shield from previous test 6 follow the wiring diagram carefully so that the data lines power and backlight lines are attached to the correct places on the arduino 7 in the arduino software programme there is an example sketch under lcd called hello world which just writes hello world to the lcd screen upload this and run it note if you are wiring as above the pins that the lcd connects to the arduino are different and the sketch should be modified find the line that says liduidcrystal lcd  1 2 3 4 5 change it to liduidcrystal lcd 3 4 5 6 7 8 8 you will need to adjust the potentiometer to get contrast on the lcd you may first see all the lcd sections light up then see the text displaying if you see the text you know your lcd module is working and is wired up correctly and talking with the arduino now we are ready to build the real thing  


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   mini usb v20 bluetooth dongle this tiny little usb dongle gives your device bluetooth connectivity instantly it is compactible with all the bluetooth modules we sell wireless price 1100  


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   christmas lights flash to music diy kit   dancing led lights which dances to the tune of any music playing it is going to be the heart of any party and liven up your room and outdoors as simple as plugging the music from your favorite music player ipod stereo and the lights start blinking with the music its simple diy kit with all the bits you need and step by step instructions to construct it yourself learn something new and build a kit which is the heart of the party the number of channels strings of lights it can control is limited by the number of i os in the arduino you can buy more relays from us to expand it step 1 making led lights dance to your music step 2 interfacing relay modules to arduino step 3 music plays and lights dance kit comes with 1 arduino 2 relay module 3 4 led lights 4 2 set of multi color lights with 20 led s 10 x 2 5 cables to connect the arduino and relays 6 earphone splitter for connecting to mp3 player 7 35mm earphone jack tags arduino led arduino rgb led arduino lilypad diy kits price 9900  get yourself the dancing lights now  


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   gps 2 putting it all together putting it all together this section describes the process of putting together the complete system gps sd lcd with arduino now that you know everything individually works and you are familiar with how each part does its job its a bit different this time because we need to use different pins in some places due to the fact that we need the arduino pin 2 for an interrupt on a switch you will need to download and install the test and final arduino sketches and also install tinygps library create a folder called gps in your arduino sketches folder for all the sketches related to this project unzip the following files into that folder once you restart the arduino software you should see the gps folder and the sketches inside that hardware test sketches  hardwaretesting final sketch  gpssduploadproject note the fourth page has more troubleshooting tips operation on power up the lcd will display an initial message and the led will blink a few times the unit will be in mode 1 and waiting for the gps to connect to satellites and get a fix once a fix is obtained the led will flash approx once per second and other modes can be cycled though until a fix is obtained recodring and uploading cannot be selected at this point if the switch is momentarily pressed the unit will go to mode 2 and will log gps data to the sd card data logging will continue until the switch is pressed again at which point the unit goes to mode 3  logging finished one more switch press will result in mode 4  sd card data uploading where the card data is pushed out on the serial port the unit goes back to mode 1 after the data upload in order to pause and restart logging you will have to go mode 3 to mode 4 wait for upload then press the switch for mode 2 logging mode stage 1  lcd and sd card shield 1 remove all the wiring to the arduino that you did previously so we can start with a clean slate 2 attach the sd card shield 3 wire the lcd breadboard wires to the header pins on the sd card shield that correspond with the ones directly on the arduino leave out the gps led and switch for now 4 download the sketches file 5 add a folder to your arduino sketches area usually mydocuments arduino called gps 6 install all the sketch files in here when you next start up arduino sdk you should see the folder and sketches in the sketchbook area 7 load the sdreadwritelcdtest sketch this attempts to write create a file called t3txt then write an ascending series of integers into it and it displays this on the lcd if you use a small sd card it might eventually fill it up if you see the lcd displaying a counting sequence then all your wiring is good stage 2  adding in the gps and library 1 attach the four wires from the gps to the sd card shield header make sure you use the 33v voltage not 5v in this case rxa and txa on the gps module go to arduino pins a0 and a1 because the sd card shield uses the serial tx and rx pins 2 download the most recent tinygps library from http arduinianaorg  libraries   tinygps  scroll to near the bottom of the page and install in the arduino libraries area 3 load up the arduino sketch  gpslcdtest  which will prove that your gps module is still working and is wired in correctly if you see valid fix lcd congratulations all is good and the gps has found satellites and got a fix if you see no fix then the gps module is either not working or can t find a satellite make sure the module is outside or can see the sky and make sure it is all connected properly you can open the serial monitor and see more detail of the communication between arduino and gps module stage 3  switch and led a switch is connected to digital pin 2 on the arduino when pressed it triggers an interrupt in the sketch and this changes modes an led is added which lights when a gps fix is found 1 wire up the switch and attach to digital pin 2 2 wire up the led and resistor connect to digital pin 9 3 test with the following sketch  switchledtest you should see the led initially flash on and off a few times then slowly flash once each 2 seconds when you press the switch once the led should flash twice per 2 seconds again and it should flash 3 times again and it should flash 4 times if you press it once more it will return to flashing once each two seconds stage 4  final sketch the electronics should all be ready now we just need the final sketch this uses two new libraries softserial which gets the serial data on any arduino pins and tinygps which takes a serial string checks and pulls out gps information into an object which you can then query for specific parts of the data 1 upload sketch  gpssduploadproject and open the serial monitor 2 wait for gps to get a fix 3 change to mode 2 logging data if you dont move around with the unit you ll get a set of identical points but for this test that is okay 4 after 10 sec or so 10 points change to mode 3 uploading you should see a data stream of your gps points that have been saved to the sd card 5 you can also power down and put the sd card into a computer with an sd reader and find the datalogtxt file to view the data directly on the card see page 4 for troubleshooting tips  


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   gps 3 using the data in google maps using the data in google maps the data on the sd card is interesting but its nice to do something more visual with it you could also put it into a spreadsheet and use it in other ways so we ve set up a process where you can import the data into a google map which will then show your route and other info this uses a sketch in another language called processing to grab the data sent by the arduino and convert it into json format so it can be used in an html page which sets up a google map most of this page relates to windows xp explicitly but processing works on mac os x linux etc so the basics are very similar the processing sketch works by looking for serial data and writing this to a text file called arduinodatajs  the js suffix means that the html file can import it as json data the arduino sketch sends filesize xxx where xxx is the number of bytes in the data file the processing sketch looks for this text and assumes this is the end of the serial data as it reads the serial data the processing sketch also reformats it into json data and stores it as a txt file so that it can easily be read by javascript in the html file the sketch also prints to a processing window so that we can see that something is happening the html file starts a google map imports the coordinate data from the text file using javascript to loop through the data and add each coordinate point to the map drawing a polyline between the coordinates processing related files  readcomwritejson unzip this into your processing sketches folder it includes the processing sketch and the map html page along with test data arduinodatatestjs this must be renamed to arduinodatajs  step 1  set up processing 1 download the latest processing software  http processingorg   get the version for your operating system 2 on windows run the exe file to install processing you ll notice it looks very similar to the arduino environment 3 you can have a play with the environment its generally a visual environment so will open a window in which the sketch will make things happen step 2  try the upload sketch note the sketch has the arduino comm port hard coded in the setup routine myport new serial this comm4 57600 you will need to update this with the actual comm port that has been assigned to the arduino you connected you can find this in device manager or equiv under ports 1 now run our processing sketch  readcomwritejsonpde  a window will open with some text starting 2 with it running and the arduino connected by usb put the unit into mode 3  uploading the window should show rapid text happening 3 the processing window will indicate when uploading is finished giving the amount of bytes transmitted in the background processing is reading from the serial port and writing to a file 4 when finished a text file called arduinodatajs will be left in the same directory as the sketch check it is there and open it to view the json data processing sketches are generally saved in a folder under processing in your documents folder note that the processing core is in my programs but the sketches are in my documents or equivalent naming on other operating systems 5 go to the  readcomwritejson  folder where you will find an html file called gmapgpsjsonhtml doubleclick this and it should load into a web browser you should see a google map appear and then a trace of your route data if you are versed in html and can follow the google maps api you can tease more data out and display it in different ways on the map for instance the gps module outputs elevation and how many which satellites it has connected to you could display the satellite count on one side and add in speed every 100 points  


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   gps 4 troubleshooting and hints tips troubleshooting when the hardware is all connected there are several processes in action and it is useful to break the operation into individual processes and use different sketches to troubleshoot each section if there are problems note that some sketches referred to in the build process on page 2 may also be helpful in troubleshooting note that the test sketches that follow are similar to those in the arduino software excapt in most cases we are using different pins eg lcd uses different pins sd uses pin 10 for chip select rather than pin 4 gps uses the analog pins  and 1 for softwareserial our gps module also talks serial at 9600 baud rather than the default 4800 baud if you use any of the arduino sketches make sure you check that the pins used are the correct ones for our hardware setup also all our sketches are set to use 57600 baud on the serial port aassuming you have a working arduino as a starting point use the blink sketch to test the sections can be broken down as follows test sketches  basictestszip 1 arduino to lcd to test the hardware and wiring are functioning run our modified lcd sketch   helloworldlcdtest this should show hello world on the top line and the bottom line should show a count of seconds elapsed since reset if the display is completely black check the backlight connections if the backlight appears to be on check that the contrast trimpot is able to change contrast wind it slowly left and right at some point the words should appear too far and all the lcd pixels may light up if odd characters appear check the wiring of the data lines 2 arduino to sd module note the sd library expects to see a card in fat16 or fat 32 format to test hardware and sd card try the following sketches   cardinfosdtest  this sketch should check the sd card and report back various information including the size and formatting of the card it should be fat16 plus a list of any files and folders on the card note that it sends this information to the serial port so open the serial monitor at 57600 baud if the card fails you may need to do some troubleshooting around the error given also try another sd card if you have one   readwritesdtest  this will attempt to write a file testtxt and some text into it then read it again again it sends data to the serial port at 57600 baud  3 arduino to gps module  to test if data is coming from the gps module run the following   simpletestgpstest  this sketch will attempt to read data from the gps module using the software serial library and write it to the serial port 57600 baud it should start with simple tinygps library this is hard coded in the sketch so doesn t test anything next these should be a data stream adding lines every second don t worry too much about the data yet as long as there are about 7 lines and they start with gpgga or gpgsa or similar if you get these then the gps module has power and is talking to the arduino fine a final line will have lat lon sat if you see this line and the stars are acutally numbers then the gps module has connected to satellites and has a fix and this is positional data if you only see the lat lon sat line repeating every second and with zeros in place of the stars then the gps module either doesn t have power or the data line is not connected correctly this line is generated by the sketch on its own and doesn t rely on the gps module working if you see the gpgga lines but lat lon sat has zeros the gps module is communicating but doesn t have a fix yet if this continues for more than 10 minutes reposition the module it gets best signals when pointing up at the sky and outside if the led never comes on the module is not able to see satellites and get a fix if you have tested the gps module as per page 1 and you have seen it getting a fix then you need to find out why it doesn t get one now some gsp modules are more sensitive that others so make sure your module is able to see the sky clearly with no obstructions it can take up to five minutes to get an initial fix so make sure you wait long enough 4 processing sketch the processing sketch should create update the json data file it relies on knowing the comm port that the arduino hardware is connected to so make sure you know this and have changed the processing sketch where the comm port number is required if you are seeing a map but no route on it make sure the json file  arduinodatajs  is in the sketch folder and open it to be sure there is some coordinate data in it if the file doesn t exist or there is no data in it open the serial monitor of the arduino software and go through the upload process again and see if data is being output then use the processing window to see that data is being read if no data is being sent check that the sd card has a file called datalogtxt on it and that it has data in it 5 google map page if there is no map make sure your computer is online if there is a map but no route showing check the json file has coordinate data in it the map is designed so that it should show an area that corresponds to your coordinate set if this file has become corrupted it could be setting the map up differently to where the coordinates are centred try deleting all the data in the file and uploading to it again note that you have to reload the map page if you make changes or upload data again to the coordinate file  


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   step 2 interfacing the relay modules to the arduino to connect the 4 relay board to an arduino is very easy and allows you to turn on and off an wide range of devices both ac and dc the first to connections are the ground and power pins you need to connect the arduino 5v to the 4 relay board vcc pin and the arduino ground to the 4 relay board gnd pin then it s a only a matter of just connecting the communication pins labeled in1 in2 in3 and in4 two 4 data pins on the arduino in the example code below i used arduino pins 7 8 9 10 i avoid using data pins  and 1 as they are used by the arduino for serial communication and can cause problems when uploading code to the arduino the default state of the relay when the power is off for comm power to be connected to nc normally closed this is the equivalent of setting the 4 relay boards in pin to high has 5v sent to it it is a safety feature to not use the nc connector incase you arduino looses power it will automatically turns off all the devices connected to the relay when you have something connected to the relays no normally open connector and you set the corresponding in pin to low 0v power will flow in from the comm connector and out of the no connector powering your device above example of connecting power and lights to a relays com and no connectors below connecting to the arduino  basic 4 realy board connection each relay is turned on for 2 seconds and then off you can here them click as there state changes from off to on and on to off you will also see the corresponding red led on the 4 relay board light up when the relay is on define names for the 4 digital pins on the arduino 78910 these data pins link to 4 relay board pins in1 in2 in3 in4 define relay1 6 define relay2 7 define relay3 8 define relay4 9 void setup initialise the arduino data pins for output pinmode relay1 output pinmode relay2 output pinmode relay3 output pinmode relay4 output void loop digitalwrite relay1 low turns on relays 1 delay 2000 wait 2 seconds digitalwrite relay1 high turns relay off digitalwrite relay2 low turns on relays 2 delay 2000 wait 2 seconds digitalwrite relay2 high turns relay off digitalwrite relay3 low turns on relays 3 delay 2000 wait 2 seconds digitalwrite relay3 high turns relay off digitalwrite relay4 low turns on relays 4 delay 2000 wait 2 seconds digitalwrite relay4 high turns relay off  next step music plays and lights dance   previous step making led lights dance to your music   arduino 4 relay module christmas lights dancing lights  step 2 interfacing relay modules arduino previous step interfacing relay modules arduino next step interfacing relay modules arduino  


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   atmel stk128 microcontroller development board the stk128 is a complete costeffective development board for the atmega128 it is designed to give designers a quick start to develop code on atmega128 mcu and makes them develope prototype device easily the atmega128 chip is mounted on a device board which can be separated from the mother board hence easily changing mcu is supported the stk128 standard package comes with an atmega128 device board while the stk128 premium package comes with the standard package an additional spare atmega128 device board an experiment fittings pack and a 5v power adapter power powered from external 5v power supply jumper for configuring voltage level to be applied 5v 33v onboard chips atmega128 tqfp64 mcu mounted on the device board ams111733 on board regulator max3232 true rs232 transceivers interfaces two rs232 connector for uart0 and uart1 db9 standard guaranteed to operate under 3v level supply thanks to the max3232 uart0 and uart1 jumpers short the jumper to connect uart to avr mcu open the jumper to vacate the i o ports 6pin 10pin isp port jtag port human to machine interface reset button used to reset the mcu power indicator led 8 surface mounted leds can be used as i o status indicator 8 pushbuttons for analog input other features crystal configurable there is a jumper for selecting on board 73728m crystal or external crystal mounted via the socket all the mcu pins are accessible on expansion connectors for further expansion all the pins are marked on the board these marks describe the function of each pin compatible with several avr mcus fully compatible with atmega64 atmega128 partly compatible with atmega1281 atmega2561 at90can32 at90can64 at90can128 development boards price 7900  


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   now we ship internationally we have had lots of enquiries to ship overseas and now we are ready to ship internationally our shipping rates are as low as 15usd to most countries now you dont have to wait to order our kits and modules for any questions contact us at contact hobbyistconz   


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   bluetooth mars rover robotic kit want to wirelessly control a mars rover from your laptop you are in the right place this kit does exactly that 10 minutes is what it takes to wire up the electronics it doesn t even need soldering for people who know programming this kit is more than a remote control robot you can write program on your pc to communicate with the robot such as scheduling tasks and receiving sensor data eg video image switch temperature light etc from the robot you can even control the robot on the internet the ways it can be used are endless this kit includes mars rover arduino duemilanove 2009 motor shield bluetooth module 4way stripped wires and approx 10 breadboard wires all you need to add is 6 aa batteries and a laptop with bluetooth connectivity the mars rover platform is a robust and easily adjustable track drive chassis that is perfect for robotics hobbyists it has two dc motor builtin and it s already assembled a 6slot battery case is also included the height of the track wheels are manually adjustable tutorials provided at the bottom of this page show you how to assemble it and the available open source code demonstrates how to control the rover on the keyboard e c s f d keys command the robot to go forward backward left right and stop specs provided by the manufacturer dimensions 245mm length x 225mm width x 74mm height adjustable height 74mm100mm ground clearance 21mm50mm operating voltage 72v operating current 160180 ma maximum speed 30 cm s speed can reach 42cm s at 12 v maximum climbing angle 30 maximum payload 75kg note the specs above should only used be as a reference performance of individual platform may vary due to manufacturing tolerance battery type and operating conditions please see our 3step tutorial on how to make a bluetooth robot  step1 hook up the motor shield step2 test the bluetooth module step3 combine bluetooth with motor shield   accesory  8  universal mounting plate  screwable mount for adding boards and sensors tags robotics robot games make a robot build a robot kid robot mr robot create a robot robot wars  lego robotics vex robotics robot what is robot robot games robot game mindstorm mechatronics build a robot how to build a robot robot movie robot building robot online robot war lego lego robot lego mindstorm  diy kits robotics price 16900  get yourself this cool robot mars rover mars rover robotic platform  


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   arduino mega 2560 what is an arduino its a mini computer which you can program using c the learning curve is small and one can easily get the first working program running in a matter of minutes the arduino mega compatible has powerful atmega2560 processor 256kb of flash 8kb ram 4kb eeprom 53 digital i o 14 pwm channels 16 analog inputs 4 uart channels spi interface i2c interface usb interface used for power supply programming free usb cable included hardware and individual components is exactly the same as ardunio mega original the only difference being that this module is not assembled in italy hence making it more affordable the ide which comes with this kit has all the code examples to get you started in a few minutes a easy start to your first microcontroller project look here for fun projects you can do with this kit  http hacknmodcom hack top40arduinoprojectsoftheweb  arduino mega 2560 timeout problem  this problem only appears to mega 2560 not mega 1280 when loading a program by arduino ide or xloader the loading hungers and never complete this maybe experiencing the exclamation problem the original bootloader would use as an escape sequence to enter a special mode if three or more exclamation point in a row are received during the bootload it will enter that mode and will no longer respond to bootload commands if you have entered any strings with then you can remove them and this should fix your problem tags arduino board arduino kit arduino projects arduino starter kit arduino serial arduino project what is arduino arduino price 4900  


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   arduino duemilanove this product has been made obsolete it is replaced by the arduino uno  what is an arduino its a mini computer which you can program using c the learning curve is small and one can easily get the first working program running in a matter of minutes the arduino duemilanove compatible has 14 digital i o 6 pwm channels 6 analog inputs usb interface used for power supply programming spi interface i2c interface uart atmega 328 microcontroller free usb cable included hardware and individual components is exactly the same as ardunio duemilanove original the only difference being that this module is not assembled in italy hence making it more affordable the  ide  which comes with this kit has all the code examples to get you started in a few minutes for windows users the driver can be downloaded from here  giving you a easy start to your first microcontroller project look here for fun projects you can do with this kit  http hacknmodcom hack top40arduinoprojectsoftheweb  tags arduino board arduino kit arduino projects arduino starter kit arduino serial arduino project what is arduino arduino price 4500  


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   arduino web switch turn your kettle on via internet arduino internet web switch this wonder kit allows you to control any electric appliance from the internet what does that mean that means you can turn on off any appliance at your home from your iphone android ipad pc or laptop from anywhere in the world as long as you have access to a web browser woooo aint that an amazing power to lay your hands on what would i do with a web switch i would do these boil water for my coffee right from my bed with my iphone turn on my home heatpump when i leave to home from work my home is warm and cozy by the time i arrive water my garden when i am on vacation rest i leave to your creative imagination to fill in what does the kit consist of arduino uno this is the cpu where the code and the webserver runs ethernet shield this shield allows the arduino to talk to any other device connected via internet the shield has an ethernet port which will be later used to connect the ethernet cable sensor shield this shield provides modular plugins to connect loads of things you want to control for this example we will interface a relay module to control power appliances relay module this module allows the arduino to turn on off power appliances read more about relays here   building the arduino web switch  stacking the shields place the arduino at the bottom as below plug the ethernet shield on top of the arduino this is also called stacking as we keep building a stack of shields above the arduino once thats done it would look like this next step is to stack the height extender pins into the ethernet shield this is necessary to ensure we dont short circuit the sensor shield pins on to the ethernet shield once the height extender pins are plugged into the ethernet shield it will look like the pic below stack the sensor shield on top of the ethernet shield as shown in pic below  wiring the relay module use the cable provided and connect it to the relay module as shown below connect the other end to the sensor shield pin number 8  vcc and gnd test power up the arduino and you should see the green led on relay module glowing if you dont see that revisit your wiring and make sure everything is correct relay testing we are about to test if the wiring is good and the relay turns on and off load this program into the arduino from this link  what does this program do  this program turn on the relay module for a 3 secs and turns it off for another 2 secs and keeps doing that how do you know if the relay is turning on  you hear a click every time the relay operates and you see the red led glowing every time it is turned on this test should test if the wiring it good and the arduino is able to control the relay getting your internet web switch to go  now that all the modules are tested we are almost there the last bit which needs doing is to load the web switch code and turn your kettle on follow the steps below in order download ethernet shield library into libraries folder present in arduino ide installation this step adds the library for getting the ethernet shield to work connect a ethernet cable from the arduino ethernet shield to your pc laptop load this code onto the arduino open up your favorite browser and copy this address onto it  http 192168125  you will see the webpage shown below on the browser this page is hosted on your arduino yes that tiny little piece of hardware can host a webpage now you can click the button on the page and hear your relay turn on off you are now able to control the arduino via the browser  turning the kettle on  now we have a working arduino web switch which can be controlled from a browser to control the kettle you will need to connect the relay as a switch for the kettle disclaimer any modification work that involves high voltages should be done by a certified electrician this web switch kit is provided by hobbyist ltd as is with no warranty of any kind whatsoever it is your responsibility to ensure your safety and proper functioning of your devices and applicances should you have any concern about health and safety please consult a professional for advice the wiring is as below  video of the completed kit in action    get a webswitch for yourself    arduino web switch power relay internet  tutorial and source code  


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   home automation rfid door lock access control kit this kit consists of arduino uno r2 usb cable mini breadboard breadboard wires rfid module rfid tags x 2 1602 lcd module dc motor controller electronic lock accessories such as led buzzer capacitors and resistors below are the 3 step tutorial for this kit step 1 rfid lcd interface step 2 motorised lock control step 3 rfid door controller tags remote access how to rfid what is rfid access control door garage opener control access security for doors doors for security rfid tags tags rfid rfid reader keypad lock lock digital digital lock auto door diy kits price 11900  


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   wiring up dht11 temp humidity sensor to the arduino   dht11 temperature and humidity sensor the dht11 is chosen because it is lab calibrated accurate and stable and its signal output is digital most important of all it is relatively inexpensive for the given performance below is the pinout of the sensor  datasheet  pin name description 1 vdd power supply 3 55 v dc 2 data serial data output 3 nc not connected 4 gnd ground wiring  connect the sensor to the arduino as shown below dht11 arduino pin 1 vcc pin 2 analog0 pin 4 gnd install the dht11 library  down load this zipped file and unzip it under the libraries directory of the arduino ide folder for example for my computer s setup the directory is c arduino101 libraries after copying files across the directory c arduino101 libraries dht should have the following two files dhth and dhtcpp program  load the program dht11ino after you save it onto your computer and open it in arduino ide  fig 1 arduino ide     fig 2 how to connect the sensor to arduino   running the program   compile the program in the ide run the program and open the serial port shown below   fig 3 how to see the serial port output output of the program  and you should see the temperature and humidity readings  final step 3 booting up the weatherstation    next wiring dht11 temp humidity sensor the arduino sensor interfacing here  


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   lcd pinout and getting it going with the arduino  lcd 1602 pinout and interface the lcd pins are numbered from 1 16 look behind the lcd to see the numbering the table below explains how to connect the lcd pins to the arduino in the case where the lcd is powered with the arduino by the 5v usb cable selecting the contrast resistor to be 2k ohm and the back led resistor to be 100 ohm is a good start alternatively a 5k potentiometer can be used to adjust the contrast wiring with arduino follow the above table and circuit diagram in fig 1  and wire up the lcd using the wires provided color coding  wire color description red vcc of 5v black ground other colors data and signal lines fig 1 lcd to arduino interfacing circuit code in this example we use the arduino pins 1234 5 for connectivity to the lcd pins 46 111213 14 respectively see table 1 therefore in arduino code we initialise the lcd as follows liquidcrystal lcd  1 2 3 4 5 this code segment tells the arduino how the lcd is connected to it download this lcd code and open it in the installed arduino development environment which comes in the accompaniying cd  next wiring up dht11 temp humidity sensor to the arduino  lcd interfacing how interface this lcd with arduino  


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   arduino sd card shield this sd card is a little stunning addon that is great for your project it allows you to expand the nonvolatile memory of your arduino device to well a few gigabytes as of the current technology it is equivalent to adding a hard drive to your arduino device this extra memory is essential for data logging applications where data is normally needed to transfer to a pc for postprocessing this sd card shield connected to the arduino by spi interface multiple devices can use the same spi interface to communicate with the arduino as long as each of the device has their own chip select it supports both regular size sd cards and microsd cards but only one can be used at a time a small prototyping area is available some prototype holds for user to expand their circuit on the shield photo shows the top and bottom views of the shield features arduino compatible stand sd card and microsd card compatible prototype expand arduino footprint expand arduino library support pin of arduino with sd card 5v vcc 3v3 gnd gnd d13 sdclk d12 sdout d11 sdin d10 sdcs when use the standard sd card libriary in arduino ide please change the cs pin from 4 to 10 ie change sdbegin 4 to sdbegin 10 if you are not sure please just download and run this sd card shield example code  note  sdhc is not supported link to the arduino sd card library arduino shields price 1600  


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   arduino 1602 lcd shield with keypad   arduino lcd keypad shield this is a 16x2 lcd and keypad shield for arduino uno diecimila duemilanove and freeduino boards blue backlight with white words uses 4 bit arduino lcd library left right up down and select buttons screen contrast adjustment arduino reset button the board uses different pins to the arduino example sketches so to make the display work use the following sequence of pins when starting the library liquidcrystal lcd 894567 the buttons are connected to only one analog input pin through resistors to give a different voltage for each button thus saving on input output pins reading the buttons is easy and example code is shown below pin connections pin function analog  buttons select up right down and left digital 4 db4 digital 5 db5 digital 6 db6 digital 7 db7 digital 8 rs data or signal display selection digital 9 enable digital 10 backlit control high backlight on low backlight off use pwm signal to control brightness pin used  installing library  download and unzipped the library folder  and place it to the arduino libraries directory once the library is correctly installed the file structcture should look like arduino0010 hardware libraries lcd4bitmod arduino0010 hardware libraries lcd4bitmod lcd4bitmodcpp arduino0010 hardware libraries lcd4bitmod lcd4bitmodh arduino0010 hardware libraries lcd4bitmod keywordstxt arduino0010 hardware libraries lcd4bitmod examples arduino0010 hardware libraries lcd4bitmod readmetxt open the example from file examples ldc4bitmod lcd4bitmodexample as shown in the screenshot below the example should provide enough information to show you how to work with the lcd and all the 5 buttons schematics download  1602 lcd shield schematics lcd panel display lcd arduino to lcd arduino lcd lcd and arduino lcd for arduino lcd to arduino arduino with lcd character display  arduino shields price 2900  


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   giving life to the robot once the bluetooth is tested and working and you have the motors wired and ready to go the robo is ready to go wireless this is a tutorial details how we go about it connect the blue tooth to the arduino board before connecting the bluetooth to the arduino you need to shutdown the arduino ide program the program you use to write upload code to the arduino this is because the serial interface of the arduino may not be shared between the bluetooth and the pc at the same time otherwise the arduino ide may crash or you can run into this slow arduino ide problem if your bluetooth is on connect the tx of the blue tooth module to the rx pin0 on the arduino board and the rx to the tx pin1 as described in the table below bluetooth arduino vcc 33v gnd gnd txd rxd rxd txd once open up putty  and select the correct com port the blue tooth module s led should be changed from flashing to stays on which indicates the connection is established now it s time to have some fun key in e c s f d in putty to control your rover  sprinkle some life into the robot    get yourself this cool robot   tags robotics robot games make a robot build a robot kid robot mr robot create a robot robot wars bluetooth mars rover motor shield  step3 combine bluetooth with motor shield how connect the bluetooth module the arduino  


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   slow response arduino ide in windows arduino ide tools menu is very slow the following syndromes appear when using a computer with bluetooth turned on arduino ide takes 30 seconds to start up while other menus are fine clicking on the tools menu it hangs for another 20 seconds this problem is caused by the autoscanning com ports feature of the arduino ide it gets confused when a bluetooth com port is present to fix this problem follow the steps below 1 close all opened arduino ide 2 go to the arduino ide directory eg c arduino101 instead of deleting the rxtxserialdll file rename it to rxtxserialoriginaldll  3 download unzip and place this rxtxserialdll file to the directory this is a common problem and it is discussed in this thread of the arduino forums http arduinocc forum indexphp topic 469770html 


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   arduino starter kit this starter kit comes with all the bits you need to create interesting arduino projects and to explore the potential of the arduino platform the kit comes with the following batch of 20 multicoloured wires breadboard 16x2 blue backlight lcd module 4 potentiometer to create analog sensors and joysticks 6 switches red green yellow pure white led packs 12 led s 6 packs of resistors 10 multicolor switch caps to make a colourful interface for the kit arduino uno usb cable things you can do with this kit lcd menu controlled by potentiometer joystick lights which dance to music or to timed patterns led cube lcd ping pong with touchbutton interface and many more only limited by your imagination arduino arduino starter kit practical arduino for arduino how to arduino arduino is arduino and with arduino starter kit projects for arduino projects on arduino arduino project uno arduino arduino uno arduino diy kits price 7600  


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   booting up the weather station wiring the arduino lcd dht11 first of all you will need to wire the dht11 sensor and the lcd as shown in the circuit diagram below fig 1 circuit to wire up the arduino the lcd and the dht11 sensor loading the program to get the weather station going the code for reading the sensor data and displaying it on the lcd is available here  the code is very easy to read and understand and you can tweak it to your advantage once the code is loaded the weather station should be reading the temperature and humidity reading and displaying it on the cool blue backlight screen  get a weatherstation  note we leave the interfacing of the light sensor as a task for the hobbyist but if you get stuck drop us a line and we will send you the link to interface it  weatherstation arduino dht11 lcd  final step 3 booting the weatherstation booting the weatherstation  


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   relay module 4 channels for controlling power appliances  module consists of 4 relays each relay is connected to a current buffer so that you can connect them directly to a microcontroller using these relays you can easily control power appliances the relay is rated for 230v 10amps this can be easily interfaced with arduinos the module has 5 led s one for power and 4 for indicating relay signals this module comes with a ribbon cable for easy interfacing of the relays to the micro rating 10a 250v ac input voltage 5v dc modules price 2000  1 channel relay  


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   solar charge and portable battery for arduino projects   this solar panel charger has an embedded 2600mah rechargeable lithium battery which means as it is charged up it can charge your cellphone and other electronic gadgets even in the dark it comes with a wall plug charger and common cellphone adapters an nz plug adapter is also included not shown in photos the internal battery can be charged by either the wall plug or solar panel putting one of these chargers in the car with a bit of blutack you ll always have a spare portable battery ready no more flat batteries in your cellphone or ipod it can charge cameras mp3s etc perfect for camping and travels it can be directly used to power arduino or other development boards that accept a 5 v input dimensions 120 mm x 73mm x 10mm weight 310 g adapter input 100 240 vac output voltage 55 v dc output current 300 500 ma dc normally it takes 60 minutes to charge up a cellphone this time may vary significantly for different phone models to charge up the lithium battery takes about 4 hours by the wall plug 10 15 hours by sunlight the charger will charge most phones incl smartphones note for this new package the usb wall adapter is no longer included tags solar panels solar photovoltaic photovoltaic solar powered solar power panels solar energy renewable energy solar electricity solar battery solar system power supply price 4499  


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   mg996r metal gears digital servo motor 13 kgcm specs stable and shock proof metal gear double ball bearing connector wire length 300mm weight 55g operating speed 017sec 60 degrees 48v no load operating speed 013sec 60 degrees 60v no load stall torque 13 kgcm 1805 ozin at 48v stall torque 15 kgcm 2083 ozin at 6v gear type all metal gears spline diameter 58 mm actuators price 1600  


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   blue backlit lcd 1602 display 16x2 characters  1602lcd module model yb1602a show 16 character x 2 lines color blue size 840 x 440 x 140 mm quantity 1 voltage 5v control model splc780c or eqv can be connected to arduino how to interface this lcd with arduino modules price 1100  lcd screen 1602 lcd module  


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   6018 high torque servo 22 kgcm this is a super high torque servo used for high performance applications it is durable and light weight due to its metal gears and case specs  6018 22kg torque metal gear servo model 6018 18 kgcm 45 v 22 kgcm 6 v size 755x2875x45 mm operating system 02sec 60 degrees 48v operating voltage 4872v weight 1422g range 180 degree actuators price 5290  


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   netsensor step 2 connect bump switch and dht22 sensor to arduino with the oled display module wired and going the next step is to get the dht22 and the bump sensors wired to the arduino this step will take us closer to getting the arduino reading the sensor data and then sending it across the interent wiring the oled display dht22 bump switch to the arduino fig 1 wiring the arduino to the dht22 bump sensor and the oled display once the above wiring is completed next step is to setup the code to get the arduino to talk to the modules to test the oled display bump sensor dht22 sensor download and unzip the dht library to the libraries folder under in the arduino ide directory mine is c arduino105 libraries then download the code testnetsensor and open it in arduino ide results  if the wiring is correct and the code is downloaded once you reset the arduino by pressing the reset button the oled display should come to life with the humidity and temperature reading on the screen  step 2 wiring the temp humidity sensor oled display door opening switch step 2 wiring the temp humidity sensor oled display door opening switch  


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   netsensor step 3 the browser talks to the arduino finding your pc s ip address to get your browser to talk to the arduino its important that both share the same ip subnet so the next step is to find your computers ip address the following links should help you with it  windows mac users  http wwwstolafedu services iit documentation ipaddresshtml linux users  type the following command on the command prompt ifconfig eth0 eth0 link encap ethernet hwaddr bc ae c549 b1 ee inet addr  19216820200  bcast 19216820255 mask 2552552550 inet6 addr fe80 beae c5ff fe49 b1ee 64 scope link what to do once you got your ip  once you have your ip lets say its 192168120  the next step is to pick an ip address in the same subnet for the arduino so that the pc can talk to the arduino for simplicity sake just increment the last digits of the ip address by 1 and use that ip address for the arduino in the example case if your ip as 192168120 then we would use 192168121 for the arduino note this should work in most cases only case where this wont is when there is another host on the network with the same ip as the arduino if that happens pick another ip say xxx23 now you have the ip address for the arduino how do you program it in  in file dht11jsonino you will find the following snippet of code which has a comment enter your chosen ip here go ahead and write the derived arduino ip address there ipaddress ip 192168208 enter your chosen ip here after the above changes compile upload the code to the arduino connecting the ethernet port of the arduino to the network there are 2 ways to go about it connect arduino to pc s ethernet port connect to the lan port of your wireless router preferred option or  test if the pc can talk to the arduino the simplest way to test the connection is to ping the arduino this can be done using the following command in the command prompt ping 192168121 if you get a response like this it means all is well and you can proceed to the next phase ping 1921682021 1921682021 5684 bytes of data 64 bytes from 1921682021 icmpreq 1 ttl 128 time 519 ms 64 bytes from 1921682021 icmpreq 4 ttl 128 time 98 ms 1921682021 ping statistics  4 packets transmitted 4 received  packet loss time 2999ms rtt min avg max mdev 83020105190183 ms netsensor up and running  now is the final moment to see all the pieces come together and you get to see your kit live on the intenet to see the kit live click the following link preferably in firefox browser for best results then feed in the arduino s ip address  netsensor live playing with the netsensor  click the bump sensor and see the alarms go off breathe into the dht sensor and see the effect on the humidity and temperature readings more things to do  can you interface this motion sensor into this kit if yes please let us know and send us the results in a video the best implementation would grab a cool gift from hobbyist  step 3 see your setup the browser from anywhere the world  


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   android tutorial part i hello world goal to get the prerequisites for programming using mit app inventor and getting acquainted with block based coding language by doing a hellopurr a hello world variation of android application  follow the steps below to complete the your first android app to get acquainted to the block based coding language of mit app inventor before moving to step 2 there are three part of tutorial for this kit  prerequisites 1 google account sign up on a google account if you don t have one   2 java plugin your browser need to have a java plugin installed in order to run mit inventor test if java is installed on your computer by clicking the link below   test if java is installed and working on your browser if java test fails you will need to install java from the link below  install java if test failed 3 app inventor setup app inventor is the android app builder using blocks rather than codes which like it s very easy to learn you need to set up your computer to use app inventor follow the instruction on the link below to set up your windows or mac pc link to setup app inventor  optional recommended this is not necessary but i found this very helpful when testing the app without installing the actual app on the android  install the mit aicompanion from the google play store with this you can use your android connected to the pc on the same wifi use as real time emulator to test your app without installing the app you are developing  install mit aicompanion app from google play store you can also search this tool on android store as mit aicompanion and install directly from there step 1 writing your first app hellopur the link below provides instructions for a hellopur a hello world version of android app it also includes a downloadable pdf version  link  and a video tutorial  link  follow the instruction to get acquainted with app inventor environment and features by doing your first app  start your hellopurr app this part completes the basics of block based coding using mit app inventor now lets start making your own application part 2 controling relay and send message to oled display part 3 reading dht sensor part 4 adding blutooth pair option and application changes 


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   android tutorial part 4 adding the pair bluetooth option in the app goal add a background to the android application and change screen orientation to landscape upgrade the android application to do following  automatically connect to bluetooth when application is opened check if bluetooth is on request user to turn bluetooth on if bluetooth is off allow user to pair to the bluetooth android bit  step 1 change the application backgorund save this image to use as background in your application you can use another image if your prefer background image to use on android application click on upload now as show on the screenshot and load the background image click choose file from open window and browse to the file location select the image file click open click ok this will display the image file in the media section select screen1 by clicking on it on the component section change the screen properties backgroundcolor none backgroundimage select the image from the dropdown list click ok the image will appear on the screen as background image step 2 upgrade bluetooth paring and automatic connection add four invisiable components and change the properties as below 1 tinydb basic tinydb rename dbmacaddress 2 notifer other stuff notifer rename notifer 3 two activitystarter other stuff activitystarter rename activitystarter 1 asturnonbt rename activitystarter 2 aspairdevice 4 change the property for activitystarters as below asturnonbt action androidbluetoothadapteractionrequestenable aspairdevice action androidintentactionmain activityclass comandroidsettingssettings bluetoothsettingsactivity activitypackage comandroidsettings add a button component basic button use horizentalarrangements screen arrangement horizontalarrangement to space it nicely on the screen change the button properties as below rename btnbluetoothpair backgroundcolor yellow shape rounded text pair bluetooth width 305 pixels height 45 pixels step 2 change screen orientation change the screen orientation to landscape to accomodate the layout to tablet screen blockbuilder code  look at the screenshot above drag the blocks to code as shown 1 create a variable to hold bluetooth mac address drag screen1initialize from the screen component use a if else block to 2 check if there are any mac address in the macaddress database 3 if not then add the mac address to the database  add a second if else block as shown in above this will check if bluetooth is on or off if off then a application request is sent to turn bluetooth on add three level nested if else blocks and other blocks as show in screenshot above first if else block checks if bluetooth is on second if else block check if there is mac address and bluetooth is paired third if else connects to the bluetooth and chnage the connect button text to disconnect insert the next two blocks on teh code as shown above when the pair bluetooth button is clicked this brings up bluetooth setting screen to pair available bluetooth  this section of code deals with two parts first update the list beforepicking block to also check if the bluietooth is on and paired insert a if else block to check if the bluetooth is on and paired if not then call the bluetooth setting screen and display message to turn on bluetooth second block code on afterpicking this saves the bluetooth mac address to use connecting on when the application is turn on next time this completes this tutorial upload and run the application to test it  mit app inventor source code   part 4 adding blutooth pair option and application changes part 4 adding blutooth pair option and application changes part 4 adding blutooth pair option and application changes  


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   arduino power adapter 9 v dc 1 a powering your arduino anywhere in your house without worrying flat batteries this power adapter is essential for your home automation project and it is built specifically for arduinos this is not the traditional heavy transformer it s the light weight high frequency switched mode power supply smps which means it s a lot more energy efficient as well nz type plug it s perfect for people who is doing a lot of arduino development it is designed for duemilanove mega and uno specs output voltage 9 v dc center positive output current 1 a maximum power supply price 1500  


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   lcd shield this lcd has a resolution of 84 by 48 pixels with a blue back light it can easily display six rows of fourteen alphanumeric characters or two rows of six very large characters furthermore it can display bitmap images that are appropriately sized it also has a 5 degree of movement joystick and a cool blue backlit lcd screen making it easy to write up menus and click on them as you go lcd shield give your project a wow factor last but not the least it allows you to debug your programme while its running this demo sketch can get you started using this lcd shield the library can be downloaded from here  note this library doesn t work with arduino 10 software please use arduino software version 22 or 23 first unzipped the lcd4884librar then copy the subdirectory lcd4884 and paste it to the directory libraries under the arduino software directory then launch the arduino software files examples lcd4884 lcd4884menu  specification power supply 5v spi interface using arduino digital pin 23456 one reset button one 5 degree joystick using arduino analog pin  backlit control arduino dio pin 7 image generation library  image2code   arduino shields price 3500  


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   digital temperature sensor ds18b20 this is a waterproof temperature sensor allowing it to be used in a wet condition it s one wire interface so only 1 digitial i o is required each sensor has a unique 9bit serial number stored in the rom this feature allows unlimited number of these sensors to be connected to the same i o pin the sensor is digital and it can give 12 bit of precision from it s embedded analogue to digital converterno external circuit and amplifier is needed to interface this temperature sensor to a microcontroller it only requires a 4k7 resistor here shows how to interface this sensor to an arduino with example code and library available this page described how to interface this sensor with arduino mega ds18b20 datasheet download specifications  3055v input voltage waterproof 55 c to 125 c temperature range 5 c accuracy from 10 c to 85 c 1 wire interface ds18b20 sensor pin outs red vcc 3 5 v black gnd white data copper solder to wire shielding interface to arduino sensors price 1500  ds18b20 digital temperature sensor  


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   dht22 high precision temp and humidity sensor dht22 is a low cost high precision humidity and temperature sensor with a single wire digital interface the sensor is precalibrated and doesn t require extra components so you can get right to measuring relative humidity and temperature features  33 6 v input 115 ma measuring current 4050 ua standby current humidity from  100 rh 40 80 degrees c temperature range 2 rh accuracy 5 degrees c 20 m m ax wire length dht 22 datasheet sensors price 1599  


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   consulting services about us  we are two profession al engineers and founders of hobbyistconz who have a combined experience of 14 years working in domains of networking embedded and android systems  services offered  clients come to us with a problem like this i want to control my farm s irrigation from my mobile or tablet and we build a solution  few projects we have completed and in progress  programmable seed drill control system remote soil humidity temp monitoring via gprs solar powered remote weather logging quadbike safety monitor with gprs alerts  winner of grassroots innovation vodaphone ict 2013 awards  prepaid rfid based vehicle wash system auto crowd interaction system for council irrigation control using custom rf tech pasture measurement module for diary farms home automation with mobile access aurora prediction for photography what we do  we design and develop linux applications android apps and build complete products and solutions our area of expertise span windows linux android and arduino based solutions networked apps or native linux application development interface with sensors data acquisition loggers machine control automating mechanical systems expertise in linux core of android wireless systems rfid near field communication nfc gsm wifi bluetooth zigbee long range rf remote dataloggers for weather and other sensing applications webdevice interface web based monitoring and control real time sensor data visualization gps live data monitoring  how to reach us  drop us a email at contact hobbyistconz or ring us at 21 1784802 to discuss your project  


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   bluetooth module device  bluetooth module  fig1 bluetooth module this hc06 bluetooth module is the most economical and easiest way to go wireless this module allows you to wirelessly extend your serial interface hence any program running on your laptop feels its controlling a local serial port which is over a wireless bluetooth link the 4 pins are 5v gnd txd rxd supply voltage should be 33 6 v absolute maximum is 7 v default pairing code 1234 default baudrate 9600 hc04 is almost identical to hc06 the only difference is that hc04 is for industry and hc06 is for civil other than that they are the same please refer this hc04 datasheet for more technical information the maximum baudrate can be configured to 1382400bps but 115200bps is recommended for reliability purposes the name and paring code can be reconfigured by a usb to serial converter  t he steps for the configuration can be found here  below shows how the bluetooth module is connected to the arduino or other microcontroller device the bluetooth module also works in 33 v power supply fig 2 bluetooth module wiring once the wires are connected in the computer under the bluetooth properties select add a device the default device name of the bluetooth module is linvor fig3 detecting the bluetooth module double click linvor and select the hardware tab you can see which com port the module is connected in this example it is connected to com 21 fig4 finding the com port associated with the bluetooth module you may use any terminal programs or the open source terminal program putty  download it and double click on the puttyexe select the serial radio button fig 5 connecting to the bluetooth module using putty application then type in the com port number that the bluetooth device is connecting to the default baud rate is 9600 click open and here you go a new session pops up and if the bluetooth module s led changed from flashing to always on then it indicates the connection is established test the bluetooth module loopback testing first test of the bluetooth module is call the the loopback test wiring the bluetooth to get power from the arduino to wire up the bluetooth power up the arduino board with usb or other power source connect the 5 v and gnd to the arduino then short circuit the rx and tx pin by doing this you ll receive exactly what you send bluetooth test from pc in the bluetooth device properties of your computer add the bluetooth device by selecting add a device the default device name is linvor and default pairing code is 1234 default baud rate 9600 the device doesn t need any driver please ignore the unknown device warning in the windows device manager in the bluetooth connection property you can found which com port the bluetooth module is connected to note   until now the led on the bluetooth module is still flashing launch putty type in the correct com port and start the session soon after the session started the flashing should stop and the led on the bluetooth module should stay on which indicates that the connection has been established in default setting putty doesn t echo what you type and whatever you type in putty gets sent to the bluetooth module so if you can see what you type in the terminal nonrepeated it means the bluetooth received the character you typed and sent it back to putty  for advance users who want to customize the settings of the bluetooth module see bluetooth module configurations  however you are encouraged to skip this and continue to step3 to get your wireless rover working first  bluetooth module is not visible to android phones and android tablets  it is reported that android has some issues with the bluetooth serial port protocol spp installing terminalbt app allows a pairing connect to the bluetooth module this link explains it in a bit more detail slow response in arduino ide when bluetooth is enabled when the bluetooth of a laptop is enabled the arduino ide becomes painfully slow and it is unusable this is due to the autoscanning com port feature of the ide this link explains how to resolve this problem step3 combine bluetooth with motor shield wireless price 2200  step2 test the bluetooth module bluetooth module bluetooth module here bluetooth module  


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   cp2102 usb to serial converter this is a usb to serial ttl level 5v converter it is an essential for embedded system developers who want their devices to communicate to pc via uart interface just like the ftdi cable does it is powered by the usb connection to 5 v the digital i os txd rxd rts cts are 33 v logic and the vcc is 5 v it is highly recommended to use this converter to configure our bluetooth module a 6way stripped cable and a usb extension cable are included for ease of use this is an easy way to connect any microcontroller or embedded device serial to the pc usb this module should work with most serial software so it s a brilliant addon to your tool box driver download datasheet download modules price 2400  


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   tablet 7 android 30 with mighty samsung cpu android development this tablet has at its heart a mighty samsung s5pv210 arm cortex a8 processor with it s builtin bluetooth connectivity this tablet is ready for any android development projects big or small combining this tablet with arduino hardware via bluetooth a sophisticated system can be built with minimum development time and effort ideal applications for an androidarduino system home automation farm automation commercial and residential security remote sensing touch controller robotics rovers off course other than android development this can also provide immense entertainment with this tablet you can listen to music watch movies youtube facebook play games its fast and slick read books great ebook reader maps add many free apps from android market skype video chat hdmi connect to tv about the os  the operating system installed is android 30 honeycomb its a beauty to look at and elegant in operation with its capacitive touch screen it responds to feather touch unlike android 23 that makes the tablet look like an enlarge version of a smartphone android 30 is optimised for 7 inch tablets android 30 os includes google app market google play online store specs  cpu samsung s5pv210 arm cortex a8 10 ghz memory ram 512mb ddr2 internal rom 4gb external capacity support 2gb32gb micro sd card not included touch screen five point capacitive 169 display screen 7 inch 800 x 480 lcd tft camera front 13 mpx support video call wifi yes gsensor yes audio high quality speaker bluetooth yes hdmi output support 720p 1080p gps no gsm phone call no 3g no ethernetrj45 support external rj45 20 adapter battery battery time 3800mah 4 hours wifi time dimension 195 x 123 x 9 mm  package includes  tablet usb cables user s manual charger 9v 15a  android price 18900  


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   arduino joystick shield v20 this is a great piece of uer interface board it is perfect for gaming and navigating through menu quickly it has headers for lcd and bluetooth modules arduino shields price 2800  


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   multimeter proskit 1232 it s the must have tool for any hobbyist this is our handpicked multimeter that is great quality and it has a good coverage of functionalities in addition to the common multimeter functions it has diode test capacitance temperature and frequency measurement it is designed by a renown manufacturer from taiwan one of the electronic hubs in the world diy tools price 5900  


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   oscilloscope rigol ds1052e 50mhz brand new unopened rigol ds1052e 50mhz oscilloscope it s the perfect present for anyone who loves electronics about rigol this is the company which manufactures scopes for agilent and hp as is mentioned in the review product features 1 gsa s maximum realtime sample rate 25 gsa s maximum equivalenttime sample rate 50 mhz bandwidths 20 automatic measurements 64 k tft color lcd bright and vivid waveform display ultra compact design 303mm x 154mm x 133mm wxhxd 2 analog channels external trigger 1 million point deep memory 1 gsa sec max sample rate 57 tft qvga 320x240 with 64k color lcd backlit display trigger modes edge pulse width slope video pattern continuous time and alternate comes with 2 high frequency probes diy tools price 57900  


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   arduino enclosure clear  make your project more permanent and protective this is a very useful enclosure it supports arduino uno series as well as the arduino mega series what s more you can add this 1602 lcd to the case making your device more professional looking arduino enclosures price 1800  


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   usb isp avr programmer this usbtinyisp is one of the most popular and low cost usb avr programmer isp stands for insystem programming it is opensource easy to make and simple to use programmer that works seamlessly with avrdude it s all you need to program any of your atmel avr processors it s been tested under windows linux and macos x perfect for students and beginners who want to do lots of projects with different atmel avr processors two ribbon cables are included works with  avrdude avrstudio v413 or later versions winavr   drivers  for windows we use a modified libusb driver you can download it here  windows usbtinyisp driver  built with libusb v112 the windows binaries below are built for this driver if you want to use the latest winavr use this  if you are using 64 bit windows vista or 7 or you re just plain having annoying problems with the driver above try  the windows 7 x64 bit driver  you ll still need to click the button that says install anyways when it complains its not verified once the driver is downloaded plug in the usb tiny isp programmer in windows start right click computer and select properties in device manager select the usbtiny properties driver update driver browse my computer for driver software point to the downloaded folder directory the driver will then be installed schematics the hardware of this programmer is open source its firmware and hardware are well documented in the open source community  eaglecad schematic and board files schematic image pin out modules price 2300  


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   breadboard power supply usb 5v 33v this is a must have for anyone who uses breadboard to prototype their projects this module has made life a lot easier it has fused protected 5v and 33v power supply avaiable you can simply power your circuit from a computer or a portable power bank this module should be a very nice addon to your electronic toolbox specifications input voltage 6512 v dc or usb power supply output voltage 33v or 5v selectable maximum output current 700 ma two independent selectable output channels size 53 x 32 mm net weight 12 g package weight 22 g main color black packing content 1 x breadboard power supply usb module modules power supply price 1600  


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   interfacing sd card module to arduino mega sensor shield in this tutorial you will learn how to interface the sd card module to the arduino mega via a sensor shield firstly let s take a close look at the sd card connector on the mega sensor shield mega sensor shield sd card header corresponding arduino mega pins pin 1 50 mosi pin 2 52 sck pin 3 53 ss pin 4 51 mosi pin 5 gnd pin 6 5v the 6pin sd card connector is actually a spi bus and their pin designation is described in the table above of course the mega sensor shield isn t essential to interfacing the sd card module to the arduino mega however it absolutely makes life easier and adds reliability to your device there is one important reason why the arduino mega is chosen instead of the arduino uno or any arduino with the atmega 328 microcontroller there is only 2 kb of sram in the atmega 328 sd card buffer requires 512 byts that s one quarter of the available memory by putting a few serialprint functions in the code it s pretty easy to run out of sram in the atmega 328 before you know it as sram runs out heap and stack clashes and your program s behaviour can become strange and inconsistent as confusing as it can get it s hard to tell whether it s the bug in the code or short of sram a situation no one wants to go into on the other hand the arduino mega has 8 kb of sram that s sufficient to most embedded programming and plenty of room can be left for future improvement extension once it s wired up download this sketch to the arduino mega make sure you have the correct board and serial com selected open the serial monitor and set the baudrate to 9600 if the sd card is working correctly you should see something like this if it fails to initialize try one of the two things below 1 shut down serial monitor unplug the usb cable wait for about 10 seconds and plug it back again start serial monitor and push the reset button 2 to make sure your sd card is in a correct state down this sd card image  only for 1gb sd cards unzip and reimage your sd card free tools lik e roadkil s disk image will allow you to reimage your  sd card beware don t select the wrong drive or you will get your hard disk reimaged by using the tricks above you should get your sd card up and running home insulation meter wireless sensor logger  interfacing card module arduino mega interfacing card module arduino mega  


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   interfacing real time clock to arduino mega sensor shield it s time to fire up the real time clock and the ds18b20 digital temperature sensor with the arduino mega remember that there is also a ds18b20 sensor on the rtc module hence this tutorial shows you how to interface two temperature sensors and a rtc with the arduino mega the mega sensor shield reduces lots of pain while connecting the parts together so it s highly recommended firstly of all use the jumper wires to connect the circuit shown below click to enlarge  arduino mega sensor shield rtc module ds18b20 sensor gnd gnd  signal 18 vcc  signal 19 ds  signal 20 sda  signal 21 scl  gnd  gnd black  signal 7  signal white  signal 6  vcc red     47k pullup resistor between signal and vcc the external ds18b20 sensor requires a 47k pullup resistor connecting between its vcc and signal lines now download this rtclib  unzip it and put it to the arduino libriary directory c arduino105 libraries restarting the arduino ide is required for the libriary to be installed properly we are going to test the rtc and the temperature sensor separately this way it s easier to diagnose if there is any hardware problems rtc testing in arduino ide navigate to file examples rtclib settimeandpointtoserial download the example code to the arduino make sure the correct board and serial com are selected and open serial monitor and set the baudrate to be 57600 if the rtc module is working you should see someting like this you may need to press the reset button for the text to come out temperature sensor testing there are two temperature sensors in the circuit we call the one with a long wire and a steel cap as external sensor and the one on the rtc module as internal sensor load this code to arduino mega and open seiral monitor on baudrate 57600 you should see the temperature reading like this again y ou may need to press the reset button for the text to come out if that s what you see great you have got the circuit working  home insulation meter wireless sensor logger  interfacing real time clock and temperature sensor arduino mega this page interfacing real time clock and temperature sensor arduino mega  


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   interfacing bluetooth module to arduino mega sensor shield this is a short tutorial to show you how to interface the bluetooth module with the arduino mega sensor shield here we are going to use serial channel 2 of the arduino mega to commuicate with the bluetooth first of all wire up the circuit as shown below a more detail tutorial for how to use the bluetooth module can be found here  arduino mega sensor shield bluetooth module vcc  5v vcc gnd gnd rx2 txd tx2 rxd power up the arduino via usb and you can see the red led on the bluetooth module is blinking which means the bluetooth link is not established download this test code to the mega the code randomly generates numbers from 18 22 to simulate two temperature readings every 3 seconds once download complete close the arduino ide and now the bluetooth can be tested in putty and our serial temp monitor  test in putty open putty and enter the com number the bluetooth link as can be seen below mine is at com4 then connect the bluetooth to putty with baudrate 9600 if the connection is established successfully then you can see the led on the bluetooth module stays on and in putty you will receive strings like below test in serial temp monitor download the executable serialtempmonitor  and open it please make sure that the bluetooth link is disconnected from putty and the led on the bluetooth module is blinking click on connect after one moment the temperature reading should appear if all working congratulations you are now ready to build a wireless temperature monitor the serial temp monitor is an opened source c program developed by hobbyist serialtempmonitor source code download home insulation meter wireless sensor logger  interfacing bluetooth module arduino mega interfacing bluetooth module arduino mega  


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   android tutorial part 2 control arduino from android android tablet app controls a relay via bluetooth  in this step you will be controlling a relay with a android app that you will be developing using the mit app inventor this step has two parts part one will be controlling a relay and part two will be sending data to oled from android app complete this step before moving to step 3 what you need arduino board  pc windows or mac internet access google account dht sensor   1 channel relay   android os running device phone or tablet  bluetooth module  oled display connector cables  arduino bit    step 2 part 1 controlling a relay wiring the hardware for step 2 do the component wiring as show in the wiring diagram below note when uploading the code to arduino unplug 5v from the bluetooth to disable it since usb and bluetooth uses same tx rx it will throw an error when loading code while bluetooth is on  pin mapping arduino  bluetooth  1 tx rx  rx tx grd grd 5v 5v vcc  1 channel relay 5v vcc grd grd 7 in arduino code for step 2    code here  android bit  turn on relay log onto app inventor using your credentials and create a new app and name it as you wish in the example below its named myapp you will chnage this to relaycontrol change the property for the screen alignhorizontal centre title relay control you can choose anything you like  note you can change the screenorientation to landscape now if you want or later in part 4 of this kit tutorial  adding relay buttons here is the list of component that is needed to turn a relay on and off drag them to your app screen arrange them show below two buttons one for on and another for off bluetoothclient for connection android to arduino two horizonatalarrangement use this to create space and layout  select the horizontalarrangement component from component list on screen and change its height property to 5 pixels click ok do the same to second horizontalarrangement select button 1 and rename it to btnrelayon and change the following properties background color green shape rounded text relay on width 60 pixel height 55 pixel  select button 2 and rename it to btnrelayoff and change the following properties background color orange shape rounded text relay off width 60 pixel height 55 pixel  adding bluetooth buttons these are the component we need to select the paired bluetooth and then initiate the connection drag this to your screen as shown first drag the horizontalarrangement on very top drag the listpicker inside the horizonatalarrangement also drag the button inside the horizonatalarrangement to the right drag the second horizonatalarrangement inbetween the listpicket and button and change its width and height properties to 5 pixel two horizonalarrangement one button one listpicker   from basic list picker  change the properties of the listpicker and button as below listpicker rename lstpkbluetooth background color cyan shape rounded text select bluetooth width 150 pixel height 50 pixel button rename btnconnect background color light gray shape rounded text connect width 150 pixel height 50 pixel optiaonal add an extra horizentalarrangement on top as show with 5 x 5 pixel to add some space on top of screen open the block editor and drag the blocks from the components and connect them as shown below these blocks list all the paired bluetooth on the android device and allow us to select the one that you would connect to this application to build the code that will connect the bluetooth that was selected from the above block of code will create a block code that will check if the text on the connect button says connect it will connect to the selected bluetooth and set the text on the connect button to disconnect and if it says disconnect then it will disconnect the connected bluetooth and set the connect button to connect again drag a btnconnectclick block and connect one if else and one if block from the control menu right click on code area to get control menu as shown below set of blocks are accessed by right clicking on the code area these include blocks for defination text list maths logic control and color to get more understanding of these block have a look at the referance document link  knowing more about blocks and how to use them  drag the blocks from the components show below change the text on the text block to connect the equals block is from number menu and text block is from text menu drag the others block and connect as shown below to complete this piece of code change the text on the text blocks as shown next code will send text 1 for on and  for off to the arduino when the relay on and relay off button is clicked on the app when the relay on or relay off is clicked the code will check if there is a bluetooth connect if connection is there it will send text 1 or  to arduino 1 and  are set as special text to trigger relay on and off n is added to indicate end of line drag the blocks and connect as shown below  this completes first part of code your code should look like as shown below  time to test the app turn on the arduino make sure the the bluetooth is connected and on pair your android with the bluetooth start the app on the android and click the select bluetooth button select the paired bluetooth from the list there might be couple of them on the list depending on the number of paired bluetooth on your android click connect button click on the relay on button this should turn relay on clicking the relay off button will turn it off  arduino bit  2 send message to oled display this is the continuous from above this part will send data from android to oled display connected to arduino complete the above steps before continuing below  hardware set for this part pin layout  arduino bluetooth 1 tx rx  rx tx grd grd 5 v vcc  1 channel relay 5 v vcc grd grd 7 in  oled display 5v vcc grd grd 4 sda 5 scl  arduino code   code here   oled library   download into arduino ide libraries folder  restart ide after doing above to access the libraries oled library needs tyo be installed before you start using it  how to install a arduino library android bit  3 send data to oled display in this part data will be sent from android to arduino and show on oled display connected to arduino to archive this add a textbox field and button as shown below and also rearrange existed buttons add four horizontalarrangement a textbox and a button horizontalarrangement drag a horizontalarrangement and rearrange the relay on and off inside the horizontalarrangement drag the second inbetween the two relay button and change the size to 5x5 pixel drag two above and below textbox to create space change height to 5 pixel textbox rename txtmessage width 300 pixel button rename btnsenttooled text sent to oled shape rounded height 30 pixel width 150 pixel set the component as shown below  open block editor and drag the blocks and connect it as shown below this block of code sends the text on the app textbox as string to arduino and display on oled when bluetooth is connected and the clears the textbox for next data this completes part 2 of the tutorial load the arduino code and test your app by sending any message to oled part 3 read dht sensor part 4 adding blutooth pair option and application changes  part 2 controling relay and send message oled display  


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   android tutorial part 3 android handshakes with arduino and does magic view sensor reading taken on arduino on the android app things to do on arduino  1 read dht sensor this is final part in this part the arduino will send read the dht sensor and display it on the app  hardware setup for this part continued from previous part  pin layout  arduino bluetooth 1 tx rx  rx tx grd grd 5 v vcc  1 channel relay 5 v vcc grd grd 7 in  oled display 5v vcc grd grd 4 sda 5 scl  dht sensor 5v vcc grd grd a0 data arduino code  code here   dht library dht   download into arduino ide libraries folder  restart ide after doing above to access the libraries dht library needs to be installed before you strat using it how to install a arduino library things to do on android  arduino app add the components as below 1 horizentalarranagment 1 textbox clock this is a invisible component horizentalarrangment properties height 10 pixel textbox properties height 100 pixel width 300 pixel miultiline true textaligment centre enabled false rename txtsensordata clock timerinterval 50 drag the components and connect them as shown below se the required properties open the block editor and drag and connect blocks are shown below create two variables buffer and incomingdata and set text on both to blank drag and connect the blocks as show below to create a timer code the code checks if there is a bluetooth connection if connection is there its starts reading the sensor data into buffer variable till it read it then transfers the data from buffer to incomingdata variable the incomingdata is display on the app textbox as text and incoming variable is emptied to receive new data if the connection is not there it display connect bluetooth to re4ad sensor on the app textbox  this almost completes the tutorial for the kit install the arduino code and test your app android app   myapp install file  mit app inventor   source code    part 4 adding blutooth pair option and application changes  part 3 reading dht sensor part 3 read dht sensor  


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   bluetooth module configurations for advance users who wish to customize their bluetooth module configurations this tutorial shows you how this can be done you will need to connect the bluetooth module directly to your pc through serial interface since these days hardly any pc has serial interface a usbtors232 converter like the one below may be used connect this module to the bluetooth module according to the table below bluetooth module usb to serial module vcc vcc gnd gnd txd rxd rxd txd while configuring the bluetooth module it shouldn t be connected wirelessly with any other bluetooth devices so switch off the bluetooth of your pc and or smart phones the default settings of the bluetooth is baudrate 9600 name linvor pairing code 1234 any changes to the above configurations will be saved even when power is off all the commands sent to the buetooth must not contain a newline character at the end putty doesn t do well in this regards hence we recommend using the serial monitor in the arduino ide to configure the bluetooth module the procedures are as follows 1 connect the bluetooth to the pc the led should be flashing 2 if you have an arduino board connecting to the pc via usb please unplug it 3 launch the arduino ide the program where you write arduion code and download to the arduino 4 select the correct com port that the bluetooth is connected to 5 open the serial monitor once the serial monitor pops up make sure the no line ending is selected to test the communication between the bluetooth and the pc send the command at case sensitive and hit the send button the bluetooth should reply ok if you can get the bluetooth to reply you are ready to configure the bluetooth module to your preference    change the baudrate the example below shows how to set the baudrate to 4800 bps send the command case sensitive at baud3 the bluetooth will reply ok4800 as shown in the figure below now since the baudrate of the bluetooth has been changed you need to change the baudrate of the terminal program to 4800 in order to talk to the bluetooth again the index after the command at baud corresponds to the following baudrate 11200bps 22400bps 34800bps 49600bps 519200bps 638400bps 757600bps 8115200bps 9230400bps a 460800bps b 921600bps c 1382400bps the change of baudrate takes effect immediately after the command is sent so if you want to keep configuring the bluetooth module you need to set the baudrate of your terminal program to the new baudrate the bluetooth is using to test it send at again you should receive ok note some max 232 chips cannot work reliably for baudrates faster than 115200bps therefore we don t recommend to set the bluetooth to a baudrate that is faster than 115200bps  change name this example show you how to change the name of the bluetooth module to hobbyist in the terminal program send the command case sensitive at namehobbyist the bluetooth should reply oksetname as shown in the figure below the bluetooth needs to be reboot power off then on for the name to be changed please note that the length of the name cannot exceed 20 characters  change pairing code the following example shows how to change the pairing code to 5566 in the terminal program send the command case sensitive at pin5566 the bluetooth should reply oksetpin as shown in the figure below the change of pairing code takes effect immediately  bluetooth module configurations bluetooth module settings change pairing code  here bluetooth module configurations  


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   arduino uno protoshield combo this combo includes arduino uno protoshield plugin module a must have makes it easy to wire up any circuit to the arduino breadboard which fits right in the protoshield you can wire up your sensors and motors lcd right here a set of about 50 breadboarding wires of different sizes  ide with complete development tools for windows linux mac os x look here for fun projects you can do with this kit  http hacknmodcom hack top40arduinoprojectsoftheweb  support we are engineers and also hobbyists who passionately involve in embedded system and software projects these development boards are the best value kits to start your first microcontroller projects as part of the open source community we are more than happy to provide you with technical supports in regards to our products if needed warranty we provide warranty for any defects in manufacturing feel free to get back to us if you have any issuesfor any of our products combined shipping is welcome diy kits price 5999  


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   raspberry pi case enclosure clear clear case for raspberry pi case comes unassembled so assembling will be required casing enclosures price 1200  


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   netsensor arduino room monitor home alarm system hooked to internet what is netsensor  netsensor is an arduino kit which allows you to monitor your room from anywhere in the world via internet all you would need is a browser and this kit has all the hardware required to monitor your room and check if its warm not too humid and if someone has broken into your home this kit can be easily extended with our existing documentation to add many new sensors and hook them up to the internet making this a powerful extendable platform to meet remote sensing needs features  room plant monitoring temperature humidity home security montoring door status sensor provision to add motion sensor or other bits you need contents  arduino uno ethernet shield oled display high precision temp humidity sensor door state sensor wires connector cables usb cable complete 3 step tutorial step 1 oled display interfacing with arduino step 2 wiring the temp humidity sensor oled display door opening switch step 3 see your setup in the browser from anywhere in the world browser view of the netsensor montoring page ethernet for arduino arduino internet to ethernet ethernet internet what is internet switch project on arduino how to arduino ethernet arduino ethernet poe sensors for arduino tutorial arduino arduino tutorial wifi arduino arduino programming arduino display arduino browser  diy kits price 11999  


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   contact us about us we are engineers and also hobbyists who passionately involve in embedded system and software projects as part of the open source community we are more than happy to provide you with technical support in regard to our products consulting we provide consulting services on arduino embedded and android products details of services we provide consultancy on product development and materials prototype development complete product development drop us a mail if you have a product in mind and want advice or help to develop it we can help you get it done  pay by online banking new zealand customers can make payment to our kiwi bank account for purchases if you use this payment method please use the first few characters of your email address as reference and email us your order kiwi bank 389011031025902 contact details 57 shirley road shirley christchurch 8013 new zealand 21 1784802 no texts please call or email    contact hobbyistconz   


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   a4988 stepper motor controller this is a single channel stepper motor controller that support a variety of micro stepping functions it s recommended for building reprap 3d printers and any other stepper motor application for documentation and more detail please visit http repraporg wiki stepstick input voltage 8 35 v current rating 2 a datasheet download tags stepper motor stepper motor controller stepper motor driver  3d printing modules price 1599  


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   relay module 8 channels for controlling power appliances module consists of 8 relays each relay is connected to a current buffer so that you can connect them directly to a microcontroller using these relays you can easily control power appliances the relay is rated for 230v 10amps this can be easily interfaced with arduinos the module has 9 led s one for power and 8 for indicating relay signals this module comes with a ribbon cable for easy interfacing of the relays to the micro rating 10a 250v ac input voltage 5v dc modules price 2999  


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   wifi universal power adapter there isn t a cleaner way to control something through the internet than using this wifi universal power adapter it s super easy to setup and use think off things you can control on off by your cellphone or computer over the internet usage of this plug is only limited by your imagination modules wireless price 4999  


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   arduino nano 30 it has similar functionality to the arduino uno but in a dip module package and works with a minib usb cable the minib usb cable is included technical specifications of the arduino nano board the technical specifications of the arduino nano board are as follows microcontroller atmega328 operating voltage logic level 5 v input voltage recommended 712 v input voltage limits 620 v digital i o pins 14 of which 6 provide pwm output analog input pins 8 dc current per i o pin 40 ma flash memory 32 kb atmega328 of which 2 kb used by bootloader sram 2 kb atmega328 eeprom 1 kb atmega328 clock speed 16 mhz dimensions 73 x 170  powering the arduino nano the arduino nano can be powered via the minib usb connection 620v unregulated external power supply pin 30 or 5v regulated external power supply pin 27 the power source is automatically selected to the highest voltage source arduino price 2999  


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   bluetooth usb adapter 100m this is the billionton bluetooth usb adapter v12 class 1 it has a range of 100m it will give your lapter or desktop pc instant bluetooth connectivity this device is supported in windows xp windows 7 and linux wireless price 1799  


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   wiznet w5100 ethernet shield great this arduino ethernet shield that is based on the wiznet w5100 ethernet chip gives you an easy way to get your arduino online it is directly supported by arduino official ethernet library the wiznet w5100 provides a network ip stack capable of both tcp and udp it supports up to four simultaneous socket connections use the ethernet library to write sketches which connect to the internet using the shield note this ethernet shield is not compatible with the arduino mega it is compatible with arduino duemilanove 168 or 328 however if you want to use it with the arduino mega this tutorial shows you how to do so more discussion about this topic can also be found here  it has a regular size sd card slot that allows you to make a miniserver this is our example code to get you started the ethernet shield uses spi interface on the arduino duemilanove and other atmega168 328based boards the spi bus uses pins 10 ss 11 mosi 12 miso and 13 sck on the arduino mega this is 50 miso 51 mosi 52 sck and 53 ss note that even if you re not using the ss pin it must remain set as an output otherwise the spi interface can be put into slave mode rendering the library inoperative power on reset issue  this is an issue with the ethernet shield that when it is powered on the reset button has to be pressed to get the ethernet shield working this issue is not specific on this ethernet shield but exists in all variant of the arduino ethernet shields the issue is caused by the fact that the normal reset time of the arduino is too short unfortunately this issue cannot be solved by software below are the solutions to resolve this problem you may choose one in your preference 1 solder a 100 nf or thereabout capacitor between the reset pin and gnd the good place to put it is between the reset button of the ethernet shield however by doing this the ethernet shield has to be removed from the arduino while downloading the program to the arduino otherwise you will get the following error avrdude stk500getsync not in sync resp x00 2 clip off the reset pin of the ethernet shield and connect it with a wire to an unused i o of the arduino so the reset of the ethernet shield is independent to the arduino before calling the ethernet library enable that output pin pull it low for 100ms and then switch the port back to input mode with pullups disabled arduino shields price 3999  


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   ethernet shield for arduino get it on2 internet cool projects you can do with this ethershield read google news from arduino host a web page in the arduino follow twitter messages of your friends with no pc but just a arduino and internet this shield connects 2 powerful things the arduino the internet awesome the projects you can do with this shield is only limited by your imagination cd contains examples how to use it that way you get it going in a few minutes  note this ethernet shield is not compatible with the arduino mega it is compatible with arduino duemilanove 168 or 328 however if you want to use it with the arduino mega this tutorial shows you how to do so more discussion about this topic can also be found here  arduino shields price 3499  


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   android app development kit for starters android is a great platform to start building your apps but its not the simplest to start with for that reason we at hobbyist have built a kit which will take you through the process of building an app step by step we start with the bare basics and eventually take you into building an app which does some fancy home automation for you it covers the basics of app development and then delves into using bluetooth wireless to talk to arduino platform this paves way for reading remote sensor data from the android tablet and use it as a dashboard for home automation and doing remote robot control  what you can accomplish with this kit  learn the basics of android app development simple hello world app make the app talk to an arduino  then read the moisture and temp of your garden read data from arduino and turn on devices with touch of a button  now you can turn on lamps tv s heaters right from the app send a message wirelessly to an oled display via the app  make this your message board leave messages to family flatmates kit contains oled display 1 arduino temp humidity sensor single channel relay bluetooth module breadboard and connector wires software tutorial and code other parts needed but not included an android 30 or later mobile tablet with bluetooth 4 step tutorial step 1 hello world step 2 android talks to arduino step 3 android reads data from arduino step 4 more android features for the app diy kits android development boards price 12900  


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   arduino uno overview the arduino uno is a microcontroller board based on the atmega328  datasheet  it has 14 digital input output pins of which 6 can be used as pwm outputs 6 analog inputs a 16 mhz crystal oscillator a usb connection a power jack an icsp header and a reset button it contains everything needed to support the microcontroller simply connect it to a computer with a usb cable or power it with a actodc adapter or battery to get started the uno differs from all preceding boards in that it does not use the ftdi usbtoserial driver chip instead it features the atmega8u2 programmed as a usbtoserial converter revision 2 of the uno board has a resistor pulling the 8u2 hwb line to ground making it easier to put into dfu mode  this allows for faster transfer rates no drivers needed for linux or mac inf file for windows is needed and the ability to have the uno show up as a keyboard mouse joystick etc uno means one in italian and is named to mark the upcoming release of arduino 10 the uno and version 10 will be the reference versions of arduino moving forward the uno is the latest in a series of usb arduino boards and the reference model for the arduino platform for a comparison with previous versions see the index of arduino boards  arduino uno compatible specs  microcontroller atmega328 operating voltage 5v input voltage recommended 712v input voltage limits 620v digital i o pins 14 of which 6 provide pwm output analog input pins 6 dc current per i o pin 40 ma dc current for 33v pin 50 ma flash memory 32 kb atmega328 of which 5 kb used by bootloader sram 2 kb atmega328 eeprom 1 kb atmega328 clock speed 16 mhz includes a free usb cable for the first plugging to the pc  usb driver installation is required in windows 7 tags arduino board arduino kit arduino projects arduino serial arduino project what is arduino arduino price 3600  arduino uno arduino uno arduino board  


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   android tablet 8 41 jelly bean pipo smart s2 description  the 8 pipo smarts2 is the first 8 android 4l jelly bean tablet pc in addition to running google s latest operating system the s2 is packed with other cool features like a rockchip rk3066 16ghz cpu quad core gpu for gaming 8inch capacitive multitouch screen flash 111 bluetooth and play store preinstalled to top it off the 2mp rear camera and 3mp front webcam for skype video chat and taking pictures combining this tablet with arduino hardware via bluetooth a sophisticated system can be built with minimum development time and effort ideal applications for an androidarduino system home automation farm automation commercial and residential security remote sensing touch controller robotics rovers specs operating system android 411 display screen 8 inch 1024 x 768 capactive touch screen camera dual camera front 3 mp back 20 mp processor arm cortex a9 dual cores ram memory ddr3 1 gb sotage memory 16 gb nand flash memory expansion microsd cards support up to 32 gb osd menu languages english wireless connectivity wifi 80211 b g n bluetooth yes ethernet network yes video decoding full hd support 2160p usb otg function no gps navigation no sensor gsensor support triaxis gsensor with display automatically to four directions supported audio format a ac aac eaac amrnb amrwb qcp mp3 wma wav midi m4a supported video format avi h264 divx divx xvid rm rmvb mkv h264 divx divx xvid wmv mov mp4 h264 mpeg divx xvid mpeg mpg flv uff08h263 h264 subtitle format mp4 h264 mpeg divx xvid mpeg mpg flv uff08h263 h264 supported ebook format txt epub pdf word excel powerpoints supported image format jpg jpeg gif bmp png battery 37v 5000mah polymer lithium ion battery battery life music playing time about 17 hours by earphone when wifi off display power off game playing time about 5 hours web viewing time about 6 hours video playing time about 5 hours by earphone when wifi off microphone yes support videorecording with sound 60 hours ports slots 1 micro usb port 135mm audio plug 1 dcin jack 1 mini hdmi port 1 tf card slot supported apps internet explorer media player photo viewer word excel powerpoint acrobat reader msn skype facebook can install apk format softwares other features alarm clock calendar calculator schedule world clock automatic keylock etc body weight 800g body dimension 199 x 153 x 102 mm package weight 15 kg package contains  1 x tablet pc 1 x charger 1 x usb cable android price 19900  


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   shipping   free shipping to anywhere in new zealand no matter how many items you buy free shipping  international shipping we currently ship to australia usa uk europe canada  15 usd if you would like it shipped to a country not in above list drop us a email to  contact hobbyistconz and we will have it arranged  


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   irrigation kit part 1 overview the flow controller project is a robotic controlled tap a serial terminal is used to send commands to the arduino setting times of controlled irrigation the hardware components an arduino real time clock motor driver powered tap irrigation valve external 5v power supply the program basically flows like this on startup read in the time table from the arduino eeprom main loop is check serial port for a command process command check timetable run water cycle this project is made up of three sections the clock plus terminal section the oled display and tempiture sensor the motor control tap 


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   dht11 digital humidity temperature sensor datasheet  pin name description 1 vdd power supply 3 55 v dc 2 data serial data output 3 nc not connected 4 gnd ground this dht11 temperature humidity sensor features a temperature humidity sensor complex with a calibrated digital signal output by using the exclusive digitalsignalacquisition technique and temperature humidity sensing technology it ensures high reliability and excellent longterm stability this sensor includes resistivetype humidity measurement ntc temperature measurement component features supply voltage 5 v high precision capacitive humidity sensor fully temperature compensated relative humidity and temperature measurements temperature range 50 c error of 2 c humidity 2090 rh 5 rh error small size 12 x 155 x 55 mm response time 5s low power consumption high reliability optimized longterm stability max wire length 20 m to learn how to interface this sensor with arduino and get the sample source code please see here  datasheet tags temperature sensor humidity sensor transducer digital sensor sensors price 700  dht11  


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   l298 motor controller this is a low cost motor controller although it s not an arduino shield it can be used with arduino or any other microcontroller platforms this module allows you to connect 2 dc motors and have total control of them from the arduino it also can be used to control one 4wire stepper motor due to its high current rating it s perfect for a single channel heavy duty stepper motor controller it allows you to move each dc motor clockwise anticlockwise stall control motor speed a 4way stripped wire is included this motor controller uses a l298 hbridge ic deliveries output current up to 2 a each channel the speed control is achieved through conventional pwm which can be obtained from arduinos pwm output pin 5 6 9 and 10 specs peak output current each channel non repetitive t 100 ms 3 a repetitive 80 on 20 off ton 10 ms 25 a dc operation 2 a analog voltage input vcc input 7 35 v with jumper j3 short circuit which gets regulated to 5 v and it s available on the 5 v terminal 5 35 v with jumper j3 open circuit a seperate 5 v input is needed to the 5 v terminal digital voltage input vd 5 v 7 v max this is output 5 v when jumper j3 is short circuit and input 5 v when j3 is open circuit max power dissipation 20 w there is a voltage regulator that regulates the vcc to 5 v for digital use for more detail please see how to use l298 motor controller  modules price 1800  motor controller motor driver  


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   netsensor step 2 how to connect arduino to an oled display why do we use i2c oled displays  they are pretty to look at elegant and power efficient unlike other interface the i2c interface only requires 2 gpio pins freeing other gpios for your sensors and actuators a typical oled display looks like this display we use is the kozig model ztsci2cmx wiring the oled display to arduino the oled display uses i2c bus to communicate with the arduino the i2c bus can support multiple devices and each device on the i2c bus has a uniqe address the arduino code uses this address to communicate with the oled display and sets its internal registers and memory to display data on the screen two pins scl a5 sda a4 in arduino uno are used for communication fig 1 wiring arduino to oled display once the above wiring is done download the library below to the libraries folder in the arduino ide installation in mine the directory looks like this c arduino105 libraries  oled arduino library then restart the arduino ide and open file examples ztoleddisplay  sci2cmxreadversion compile the example and download to the arduino oled display showing some text  once the code is downloaded restart the arduino by pressing the reset pin and you should see some text like this if you can get to this point congratulations you have got your oled sorted please proceed to the next step step 2 wiring the temp humidity sensor oled display door opening switch  step 1 oled display interfacing with arduino oled  


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   wireless sensor and data logger what can this box do  this kit is a template to demostrate how to build a wireless sensor that logs data to a sd card with time stamps from a real time clock the data in the sensor can be viewed and retrieved wirelessly by a pc as an example this kit consists of two precision temperature sensors any other sensors such as humidity light windspeed and presure sensors can be added easily to this kit if required use case example one of the two temperature sensors is located inside the box and the other one outside on a 12 meter cable by locating the two temperature sensors in two different areas eg indoor and under floor we can see the temperature variations of the two areas over time one good use case is to measure how good your home insulation is having said that this kit is designed with diy in mind extra sensors can be added very easily and soldering is minimum because of the use of the sensor shield by adding a humidity sensor light sensor wind speed sensor etc this box can be turned into a wireless weather station  what is included in this kit  this wirless sensor and data logger kit embodies a few very cool technologies real time clock sd card read write bluetooth and one wire digital temperature sensor not only can it be easily turned into a general purpose wireless sensor logger it also is a fantastic educational kit after all this kit includes all the neccessary bits to construct a fully working wireless sensor logger the package includes arduino mega 2560 arduino mega sensor and servo shield usb cable real time clock module onboard temperature sensor incl sd card module kingston sd card 1 gb bluetooth module temperature sensor waterproof case cable gland x 2 some wires and accessories since every recording is less than 32 bytes if record every minute the 1gb sd card has enough space for more than 63 years we have also tested the kit on 4gb card if you ever need more space follow this 3step tutorial to assemble this amazing kit step 1  interfacing real time clock and temperature sensor to arduino mega step 2  interfacing sd card module to arduino mega step 3  interfacing bluetooth module to arduino mega diy kits price 11900  


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   irrigation kit part 2 the clock plus terminal first step is to connect the real time clock  it is an i2c device and just requires two wires plus power ground connecting arduino via i2c to rtc the pins we connect from the real time clock module to the arduino real time clock arduino wire colour 5v 5v pin red gnd gnd pin black scl the i2c clock pin a5 green sda the i2c data pin a4 yellow i connect to the rtc with this library https githubcom adafruit rtclib how to install a library can be read about here http arduinocc en guide libraries accessing the clock via serial terminal commands for setting the time and adjusting the time are sent to the arduino via the serial port any serial port terminal software can be used to do this the arduino has one in it ide or you could use an application like putty to access the arduino serial commands available  command function help text about program usage time reads the clock shows the time set time sets the clocks time alarm shows alarm time set alarm set an alarm time the main bit of the serial terminal code is the command buffer which is used to store the typed in commands the arduino serial monitor needs to have carriage return on see picture below that s because we read characters into the command buffer until a carriage return is entered and then a command is processed once that is done you can enter a command and press send to set the clock to adjust time you enter the command set time this will then prompt you to enter the date in format like this jan 9 2014 next it will prompt you to enter the time in a 24 hour format like this 12008 note the leading zero it is required if the time is before 10 once that is done you can enter the command time to see the time in the serial terminal to set the alarm to set the alarm you enter the command set alarm this will then prompt you to enter the hour of the alarm in 24 hour mode like 7 then you will then prompt you to enter the minute of the alarm like 30 once that is done you can enter the command alarm to see the alarm time in the serial terminal the code for the real time clock and alarm is  here   the clock plus terminal section  


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   irrigation kit part 3 the oled and tempiture humidity sensor these two devices the dht11 and the oled  are both i2c and because of the nature of i2c they connect to the same pins as the real time clock because each device has it s own address the arduino can work out which device the data is comming from or which device on the chain it is send to the dht library can be found here  the oled library can be found here  how to install a library can be read about here  the code for the real time clock and alarm is  here   the oled display and tempiture sensor  


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   3d printing service ever want to print out something that appears in the computer screen engineering prototype custom parts archetactral models art works and many more our printing service starts from 2999 for an object no greater than100mm x 100mm x 40mm provided that you supply us a printable file in stl format printing material is abs if you need to get a larger object printed please drop us an email for a quote our maximum printing space is 200mm diameter x 380mm height we offer discount for larger quantities 3d printing price 2999  


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   qubea 3d printer we are the authorized distributor of this remarkable qubea 3d printer in new zealand unlesh your imagination the qubea 3d printer is highly reliable piece of machine it works out of the box no need assembly or calibration it works first time every time it allows you to get into the 3d printing market fast and deliver exceptional values to your customers each machine was calibrated before shipping to our customers the integration of hardware and its software is seemingless its printable size is one of the largest and tallest among other printers in the market at 200mm diameter by 380mm height the qubea 3d printer is stand alone it prints directly from its sd card so an external computer is not required price is per unit plus free delivery in new zealand printer specs printer dimension 410mm x 360mm x 820mm weight 25 kg printing space 200mm diameter x 380mm printing speed 80 200mm s layer thickness 1 3 mm nossle diameter 04mm printing material abs pla printing filament diameter 175mm printing file format stl os windows 7 xp power 230v ac power rating 400w demo is available for viewing in christchurch 3d printing price 259900  


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   3d printer pla filament 1kg choose your color quality 3mm 175mm pla filament for 3d printers stock is in christchurch ready to be shipped or picked up we also have other colors available so please advice color after checking out default is dark purple 3mm black white blue red yellow green gold 175mm also avilable suitable for 3d printers makerbot mendel bfb3000 suitable to make light rigid moulded products with good shock absorbance and wear resistance specs 3mm weight 1kg density 125g cm 3 reel size 205mm x 205mm x 120mm diameter 3mm 01mm total length 114m specs 175mm weight 1kg density 125g cm 3 reel size 205mm x 205mm x 120mm diameter 175mm 005mm total length 330m 3d printing price 5799  


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   mr basic robotic platform this is a great platform to experience the joy of building an entire robotic platform from the nuts and bolts once the platform is assembled it has 2 dc motors and a battery case to power this little toy and drive it around great gift for kids to get them going on mechanics and robotics if you are after a very platform to build upon and do more advance robotics and rugged terrain we would reccomend you look at mars rover robotic platform  features aluminium based 4wd robot chassis 2 motors gearboxes and a 3xaa battery holder double sided pcb with plate through holes motors are rated 45v6v with a no load current of 250ma l x w x h 150mm x 107mm x 58mm pcb size 60mm x 110mm assembly is required for this kit this mr basic mobile robotic platform is a simple 4wd robot chassis with an aluminium base 2 motors gearboxes and a 3xaa battery holder the prototype pcb on top is double sided with plate through holes the motors are rated 45v6v with a no load current of 250ma and a stall current of 18a 45v each this mr basic mobile robotic platform can give you immense pleasure and flexible mechanical movements tags robotics robot games make a robot build a robot kid robot mr robot create a robot robot wars robotics price 4400  


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   universal mounting plate for mars rover this universal mounting plate is specifically designed for mars rover  our latest batch are in black colour  robotics price 800  universal mounting plate  


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   real time clock module arduino tiny rtc i2c real time clock this arduino tiny rtc i2c module incorporates the ds1307 i2c real time clock ic and the 24c32 32k i2c eeprom storage what s more it has a ds18b20 temperature sensor on board all of this in a tiny package of 25mm x 28mm x 84mm it comes with a lir2303 rechargeable lithium battery and a charging circuit is included in the module when the temperature sensor is off the rtc module can run for 1 year on a single charge specs of ds18b20 temperature sensor 3055v input voltage waterproof 55 c to 125 c temperature range 5 c accuracy from 10 c to 85 c 1 wire interface wiring the rtc to arduino the most useful pins are duplicated from p1 to p2 if needed the pin bat can be fed into an adc pin for monitoring the battery voltage the pinouts are explained below connecting vcc to 5 v will trickle charge the onboard battery arduino tiny rtc i2c real time clock pinout pin description comment bat battery voltage to monitor the battery voltage or not connected gnd ground ground vcc 5v supply power the module and charge the battery sda i2c data i2c data for the rtc scl i2c clock i2c clock for the rtc ds ds18b20 temp sensor output one wire inteface sq square wave output normally not used the i2c wires sda and scl are the data line and clock line they should be connected to the corresponding pins depending on the arduino board board i2c twi pins uno ethernet a4 sda a5 scl mega2560 20 sda 21 scl leonardo 2 sda 3 scl due 20 sda 21 scl sda1 scl1 example code is available here  for more detail please visit the arduino wire library  schematics the schematics of this rtc module can be downloaded here  modules price 1299  real time clock real time clock real time clock  


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   about us hobbyist ltd was found in 2009 by two engineers who are passionate about applying technologies to solve some daytoday problems  


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   ultrasonic motion detector long range ultrasonic sensor for detecting motion if there is movement it gives a high on the output pin if no motion is dected it stays low this is meant for alarm system auto lighting and robotic applications which needs to sense motion it only detects the presence of an object doesn t measure the distance applications motion detection security systems selfwarning systems robotics and many more specs supply voltage 6 12 v dc supply current 2 ma output voltage  5 v sensing angle range 15 degree sensing distance 8 m sensor resolution 2 3 mm tags proximity sensor transducer distance sensor proximity motion detector water sensor parking sensor proximity switch wireless sensor sensors price 1499  motion sensor  


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   3 axis accelerometer arduino compatible  mma7361l 3xis accelerometer replacement of mma7260 analog voltage output for each axis very easy to interface and very precise support both 5v and 33v power supply selectable sensitivity 15g 6g pcb size 279mm x 168mm works with arduino or any microcontrollers its very easy to interface we can also provide sample code to get it working with arduino project to do with this module single wheel balancing robot tilt sensing joystick for games robot control using gestures many more creative projects limited only by your imagination  arduino example to get it going datasheet link sensors price 1499  


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   srf05 ultrasonic distance sensor the srf05 ultrasonic range finder lets you find the distance of the objects in front of it it does that by sending ultrasonic pulses and measures the time it takes for the pulses to travel to the obstacle and back specs ranges from 1cm to 4m returns a positive ttl level signal width proportional to range 34cm resolution dimensions 43mm x 20mm x 17mm how to use this sensor with the arduino  pins details trig  plusing a high on this pin will send a pulse echo   the pulse length is propotional to the distance from the obstacle 100usec to 25ms times out if 30ms  sensors price 1099  


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   barometer sensor module bmp085 i2c bosch temperature and barometer sensor module bmp085 i2c interface internal adc 5v 33v input voltage documents bmp085 datasheet bildr tutorial quickstart guide example arduino sketch sensors price 1399  


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   goteck gs9025mg micro analog metalgear servo 9g goteck servos are the perfect alternative to expensive name brand servos they offer superior performance longevity and quality all at an affordable price they are fast lightweight smooth and precise servos that you can trust each servo includes several servo horn sizes grommets and mounting screws very comparable to hitec hs65mg very small lightweight and powerful metal gear for longer wear life and extra strength in demanding applications perfect for use in mediumsized electric airplanes or helicopters compare to gs9018mg this servo has higher torque the 9018mg has less torque but faster speed horns are included model gs9025mg mounting hole centretocentre 28mm weight 13 g analog metal gear dimensions 230 x 121 x 288 mm wire length 180mm standard jr style plug operating voltage 48 v 60 v speed 12 sec 60º 48v 11 sec 60º 60v torque 326 ozin 235 kgcm 48v 347 ozin 25 kgcm 60v spline diameter 48 mm range 170 degree motors price 899  


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   wireless data logger data acquisition system application data logger used to measure home insulation how good is my home insulation  with this data logger you can have a fairly good idea of how well your home insulation is working for you knowing the insulation performence allows you to make informed decisions on improving investing your home how does it work  this data logger has two precision temperature sensors one is external with a 12 m cable and the other one is internal in the box by locating the two temperature sensors in two different areas eg indoor and under floor data logger will measure and log the temeperatures to a sd card the temperature variation of the two areas can then be plotted and analysed no need to open up the box to retrieve the data this data logger allows you to retrieve its data wirelessly via bluetooth this data logger embodies a few very cool technologies real time clock sd card read write bluetooth and one wire digital temperature sensor it can be easily turned into a general purpose wireless sensor logger it is also a fantastic educational kit after all what is included in this kit  this kit includes all the neccessary bits to construct a fully working data logger the package includes arduino mega 2560 arduino mega sensor and servo shield usb cable real time clock module onboard temperature sensor incl sd card module kingston sd card 1 gb bluetooth module temperature sensor waterproof case cable gland x 2 some wires and accessories follow this 3step tutorial to assemble this amazing kit step 1  interfacing real time clock and temperature sensor to arduino mega step 2  interfacing sd card module to arduino mega step 3  interfacing bluetooth module to arduino mega diy kits price 11900  


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   nema17 stepper motor nema17 stepper motor which is also called 42 stepper motor it is the standard stepper motor used for reprap or other 3d printers specs model hy42dj48 supply voltage 12 v max supply current 12 a max torque 53 ncm number of phases 2 number of wires 4 resolution 18 degree weight 350 g wire color phase red phase a blue phase a return green phase b black phase b return 3d printing motors price 2999  


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   ac current sensor sct013030 noninvasive ac current sensor sct013030 30a split core current transformer ideal for energy monitoring and machine automation core material ferrite external material plastic input current 0a30a opening size 13 x 13mm output plug 35mm dielectric strength 6000v ac 1min working temperature 2570 c antiflaming rate ul94v0 mechanical strength 50020 c  datasheet link how to use the current sensor and the input current to sensor current ratio table sensors price 1299  


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   inspection camera usb endoscope 5m long  if you want to look inside a machinery and see what is going wrong or inspect electronic parts without taking it apart how about looking for what s in your house ceiling and under floor without going in there this is the tool for the job led light around the lens so working in the dark is not a problem this inspection camera has many applications including electronic boards parts inspection home insulation leakage inspection vent pipe machine equipment car engine automotive  boat aircraft inspection this is the tool to have in your toolbox its uses are many and it is like the electronic swiss army knife image sensor 300k pixels cmos led 4 white led bright lights resolution vga 640 x 480 pixels qvga 320 x 240 pixels frame rate 30 fps lens f24 usb interface usb 20 waterproof level ip66 cable length approx 5m cable diameter 4mm camera dimensions approx 10 diameter x 50 l mm approx 38 diameter x 2 l inch software interface usb plugandplay no driver required windows 7 please this link to setup the camera  we recommend you use the free software debut video capture to capture videos diy tools price 3900  


