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Digital Luxmeter

Description: 

Digital luxmeters are more efficient and reliable as compared to analog luxmeters. These smart devices are useful for light-sensitive engineering projects. Whether you are designing a student-level project or an industrial automation system, digital luxmeters help in acquiring precise illuminance reading in any particular area. Digital Luxmeter (UNI-T UT383) Front


Main Features of Digital Luxmeter

  • Efficient and Precise readings
  • Easy to carry
  • Durable
  • Power saving with auto power-off feature
  • Backlight in LCD


Digital Luxmeter Specifications:

  • Illuminance range: 0-199999 Lux ±(4%+8) or 0-19999FC ±(5%+10)
  • Resolution: 1Lux or 1FC
  • Sampling range: 2/s
  • Operating environment: 0 ~ 40°C <=80%RH
  • Storage environment: -20 ~ 60°C <=75%RH
  • LCD dimensions: 32x26mm
  • Device dimensions: 160x50x28mm
  • Power Source: 4.5V (1.5V battery AAAx3)
  • Weight: 118g

Digital Luxmeter (UNI-T UT383) Back

How Does a Digital Luxmeter Work?

Luxmeter uses photodiode, a light-sensitive sensor for measuring the intensity of light. The current passing through the sensor is dependent upon the intensity of light, as the intensity of light varies, the reading on the luxmeter also varies. The output of the sensor is processed and sensed by a microcontroller and according to the voltages, the microcontroller generates light intensity reading.

Modern luxmeters have several more functions such as storing readings, applying filters, pausing a value and connecting with computers via USB.


Applications of Digital Luxmeter:

Luxmeters have several applications, especially in engineering discipline. Whether an engineer is ensuring the directions of Solar Panels is according to the light orientation or the light intensity in an office is being monitored or a student-level home automation project is being developed, a luxmeter can be helpful.

  • When a new Solar Power System is installed, it is essential to keep the direction of Solar Panels according to the orientation of Sunlight. Ensuring proper direction may result in maximum power generation. The luxmeters are helpful in monitoring the light intensity at various positions and accordingly Solar Panels are tilted at a certain angle.
  • Low light or high light intensity in offices and schools can result is fatigue, it is necessary to keep proper light in places that are illuminated through synthetic light. Luxmeters works well for measuring indoor light intensity.
  • When it comes to home automation, switching off lights, closing/opening curtains according to the light intensity are one of the most interesting features. For precise handling of light intensity, luxmeters are used for reading light intensity.
  • Street lights can be automated to turn on/off according to the availability of light. But a more interesting project can be to develop a more power-saving project that controls the intensity of street light according to the need. A street light that illuminates partially at low sunlight and the intensity of light increases as the sunlight starts vanishing.
  • Professional Photographers and videographers always consider light intensity before shooting. Digital luxmeters are useful for such people as these smart devices auto turn off if not attended for long, they are lightweight and easy to carry anywhere, and their low power consumption enables the batteries to last for long.

Digital Luxmeter (UNI-T UT383) in hand


FAQs:

1- What is the maximum range of this luxmeter’s reading? 

This device is capable of reading light intensity up to 199999 Lux or 19999FC.


2- Is it useable for outdoor applications? 

Yes, it can be used for outdoor applications such as reading sunlight intensity or synthetic light’s intensity but the device must be protected from extreme temperature and humidity (maximum 40°C <=80%RH).


3- How much time does this device take for auto power off? 

The device turns off after 5 minutes of inactivity.


4- What is the sample rate of this device? 

This device takes approximately 2 samples per second.

Catalog: 

Price: $59.99

Digital Laser Photo Tachometer

Description: 

Laser Tachometer DT-4434C package

Digital tachometers are smart devices that enable the user to measure the speed of any motor’s shaft or any other rotating object such as the chuck of a lathe machine. The device is designed to measure the rotational speed of objects without any physical contact.

Traditional analog tachometers worked by physically contacting on revolving parts and they were comparatively harder to operate. Changing their tip according to the shaft type and holding tip onto running shaft wasn’t as easy as just directing laser light on the shaft from a distance. Laser tachometers are much safer with their no-contact feature as the user doesn’t need to make physical contact of the device with any fast-moving object like a lathe machine’s chuck. Furthermore, recording values is easier with digital display.

Main Features of Digital Tachometer:

  • Digital display
  • Reliable results
  • Easy to operate
  • Smooth and easy to carry
  • Light weight
  • Strong case
  • Durable device

 

 Digital Tachometer Specifications:

  • Min/max/last reading recording feature
  • Test range 2.5-99999 RPM
  • Sampling time: 0.8 seconds over 60 RPM
  • Accuracy: ± (0.05% + 1 digit)
  • Operational environment: 0-50 degree Celsius, Humidity <80%RH 
  • Dimensions: 160x76x40mm
  • Resolution: 0.1 RPM (2.5 to 999.9 RPM), 1 RPM (over 1,000 RPM)
  • Power Source: 4.5V (1.5V battery AAAx3)
  • Weight: 280g (including battery)

 

How Does a Laser Tachometer Work?

The laser tachometers emit laser light and when the light strikes on any dark surfaces, no or very less light is reflected back to the tachometer. But, when the light strikes on a bright or shiny surface, a comparatively higher level of light reflects back. The photosensor in tachometer detects the light signal over a specific time period and accordingly measures the speed of the motor. When a piece of reflective tape is pasted on the shaft of the motor, every time the laser strikes on the tape, the tachometer counts a revolution.

Apart from taking speed readings, digital tachometers also store min/max speed readings for better performance. The test button enables the user to calibrate or practice before taking any readings.

For more details on how to use Laser Tachometer, check this video

https://www.youtube.com/watch?v=QVSQLfnKytk

Laser Tachometer DT-4434C front

 

Applications of Tachometer:

The applications of tachometers are usually related to the measurement of a motor’s speed. But they can be used for measuring the rotational speed of any object.

  • In order to calibrate the speed of a motor’s speed, it is essential to measure its speed. Tachometers are widely used for calibration in the industry for monitoring the speed of motors on conveyor belts and other parts of operations.
  • The speed of the lathe machine is directly affective on its performance. While working on sensitive projects, the operators check its speed and set as needed.
  • Motor windings can often burn due to excessive heating or overloading. In such cases, the motors are rewinded but once rewinded, the RPM of the motor may no longer be the same as before. In order to measure the new RPM, tachometers can be helpful.
  • Tachometers are useful in all places where the speed of a motor has to be monitored. Similarly, the speed of a generator’s shaft can give an idea of how much energy will be generated, for such details, a tachometer can be helpful. In small scale hydral generators on canals and wind turbines, the rotational speed has to be analyzed for determining the power and frequency parameters.

Laser Tachometer DT-4434C side view


Projects Related to Motor Speed Control: 

555 timer-based DC motor speed control

https://www.electronicshub.org/speed-control-of-dc-motor-using-pulse-width-modulation/

 

DC motor speed control with Arduino and potentiometer

https://www.instructables.com/id/Arduino-DC-motor-speed-control-potentiometer/

 

Arduino based AC motor speed control

https://create.arduino.cc/projecthub/saulius-bandzevicius/arduino-based-universal-ac-motor-speed-controller-a4ceaf

 

FAQs:

1- What is the maximum range of this tachometer’s reading?

This device is capable of reading RPM up to 99999.


2- Is it useable for measuring the rotational speed of objects other than motors?

Yes, it can be used but the device may not perform well if proper conditions are not met.


3- Is it necessary to use reflective tape for measuring?

Yes, the reflective tape ensures that the laser light reflects back toward the photosensor and the tachometer counts a revolution. However, in case of some motors, a part of the shaft is already shinny or a shiny sticker is already present for the same purpose. In that case, using a reflective tape is not necessary.

 

 

Catalog: 

Price: $35.99

LightDrive: Solar powered magnetically levitating machine

Description: 

Solar power is one of the most abundant sources of energy, Light Drive uses the solar power to drive a tiny motor which is magnetically levitated.

This model blends in multiple technologies together to achieve its operation. It uses magnetic levitation to create a very low friction rotation mechanism which allows it to sping for a very long time with the smallest amount of sunshine.

This makes it a great science toy to have on your desk and have it spinning for hours on end with a glimmer of sunshine.

Inside the LightDrive is a simple Mendocino motor which is clever system developed by Daryl Chapin from Bell Labs, it has been refined many times over  to get to the LightDrive.

The 4 donut magnets provide the magnetic suspension and the pancake like magnet on the bottom provides the magnetic field for the solar motor.

One end of the motor is entirely suspended in air due to the magnetic fields from the donut magnets and hence the magnet has the least amount of friction when running.

This is great science toy for the inquisitive mind which give you hours of fun as well as displays the concepts of magnetic levitation and highly efficient Solar powered motor.

Catalog: 

Price: $49.99

Wifi Datalogger for temp & humidity with prolonged battery life

Description: 

Dataloggers are great tools which allows you to measure changes in parameters over time, Be it to track the change of weather over time or monitor the temperature and humidity in your green house the datalogger is the tool for the job.

We present a datalogger which has been tested to run 5 months on a single charge of battery. The datalogger works over wifi and provides a great graphical interface for you to view the data.

Not only does it show the live temperature and humidity, it also shows the battery level.

View the live graph here

Other applications of dataloggers:

  • Food processing: Monitoring temperature of food, cooking etc
  • Scientific and Industrial research
  • Monitoring buildings: Measureing the temperature and humidity in public buildings, galleries, homes and warehouses
  • Automotive: Monitoring temperature during vehicle testing
  • Environment & Weather: Monitoring weather and environment for changes over time
  • Datacenters: Monitoring server room temperatures
                                                 

Our loggers have been used to measure home insulation by tracking the temperatures outside the home vs inside the home to get the insulation characteristics of new home builds,

It can be used for frost detection in orchards and greenhouses. If you are into weather, there is no better tool to track the changes in weather over time and keep an eye on trends.

The logger allows to download the past data in Excel viewable format with.

Download & View sample data collected from datalogger

Specs:

Temperature sensor : DHT 22

Absolute accuracy: ±2%

Repeatability: ±1%

Long term stability: ±0.5% per year

Battery Life : 150 days on full charge ( approx 5 months)

Battery type: 1 x 18650

NOTE: Battery not included


FAQ:


1. How does the datalogger work?

    The wifi datalogger collects temperature and humidity samples every 15 minutes and uploads the data on to our cloud server,

    Each logger has a unique key to identify it (it is provided  on purchase), this key can be used to download and view its data from a browser or mobile phone.


2. How do I view the live data from the logger?

    Each logger has a unique key which is provided on purchase.

    To view the graph use below link:

    https://www.hobbyist.co.nz/sites/default/files/datalog/graph/graph.html?key=YOUR_KEY


    To download the excel readable data collected so far:

       https://www.hobbyist.co.nz/sites/default/files/datalog/data/YOUR_KEY.csv

3. How do I setup the datalogger to connect to my Wifi?

    Steps to setup the datalogger to connect to your wifi can be found here

    https://www.hobbyist.co.nz/?q=setup-wifi-access-for-datalogger


4. Is this product ready to use, is any assembly required ?

    Yes, once you put the batteries and configure the Wifi its ready to go, no assembly is required.


5. Can this logger connect to other sensors, like voltage, soil moisture etc?

    Yes, the logger is designed to connect a variety of sensors, based on a minimum order quantity we can build loggers with your required sensors.

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Catalog: 

Price: $179.00

Arduino

What is Arduino

Arduino is an open source computer hardware used for building digital devices and interactive objects that can sense and control objects in the physical world. The project's products are distributed as open-source hardware and software, which are licensed under the GNU Lesser General Public License (LGPL) or the GNU General Public License (GPL) permitting the manufacture of Arduino boards and software distribution by anyone. Arduino boards are available commercially in preassembled form, or as do-it-yourself (DIY) kits.

Arduinos are programmed using the Arduino IDE which can be downloaded from here :

https://www.arduino.cc/en/Main/Software


Why is Arduino so famous?

Arduino's are simple to use and program. It is used by a wide variety of people some who have a programming background to other who range from artists and DIY enthusiasts.

Arduino comes with a lot of free libraries making it easy to connect to different hardware, like a LCD display or a smoke sensor or even controlling a robot.


We at hobbyist provide a lot of kits build around the Arduino ecosystem, all our kits comes with all the bits needed including the source code.

This makes it very easy for they buyer to build the kit and get it going, we provide awesome technical support if at all you get stuck using any of our kits.


Some of our tutorials include :


Mars Rover: A kits set to build a complete robot which can be controlled wirelessly from your mobile or laptop


Hobbyist Mars Rover, Arduino robotic kit


Weather Station: If you are into weather, this is a nice little kit with a display which shows your local weather


Hobbyist Arduino WeatherStation kit

Christmas lights dance to music: If you wondered how to make your lights dance to the music you play, this is the kit for you. The kit comes with strings of LED lights which when connected to your mp3 player or stereo dances to the tunes of the music

Keep forgetting keys, make a door lock using our fingerprint kit. No need to carry your keys anymore. This kit comes with a fingerprint sensor and electronic door lock and the source code to help you build the complete working fingerprint door unlocking kit

Arduino Fingerprint door unlocking kit


Arduino tutorials by Hobbyist:


Connecting relay to Arduino

Connecting LCD display to Arduino

Connecting OLED display to Arduino

Connecting Temperature and Humidity sensor DHT11 to Arduino

DC motor speed control with Arduino

Connecting Bluetooth to Arduino


Trouble shooting Arduino

Slow Arduino IDE windows

Fingerprint scanner : door security kit

Description: 

Having problems with memorising the password? Forgetting the combination code?
With the Fingerprint Sensor Kit you can protect your treasures or secrets using your biometric ID.
ie your fingerprint.

Fingerprint is your unique signature which you carry with you everywhere you go, so unique that you
can use it to open locks and use it as your password.

It is complicated to build a complete system to do your own fingerprint sensing and integrate it with a lock,
For this reason we bring a complete kitset with step by step instructions to get going a Biometric fingerprint kit
which can open a door lock.

Our Kit in action - Biometric Door Lock:

Fingerprint scanner, biometric system, biometric devices, attendance system, fingerprint reader, fingerprint technology, biometric card, fingerprint attendance system, fingerprint login,

Instructions:


1. Adding fingerprints to the reader

2. Assembling the fingerprint scanner kit parts and testing it works

3. Building the complete biometric kit with scanner and a OLED display

Catalog: 

Price: $119.00

Wireless Sensor and Data Logger

Description: 

What can this box do?

This kit takes measurement of its two precision temperature sensors, and logs the data to a SD card. Both real time readings and stored data can be sent wirelessly to a PC.

How is it useful?

One of the two temperature sensors is located inside the box, and the other one outside on a 1.2 meter cable. By locating the two temperature sensors in two different areas (e.g. 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 wireless 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

Follow this 3-step 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

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Catalog: 

Price: $149.00

WiFi Switch: Turn your kettle on from your mobile

Description: 

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 , usage of this plug is only limited by your imagination.

Plug in the device you want into this socket and you are free to turn it ON from anywhere with your phone.

The app is designed to allow adding multiple sockets in your house and label them "Kettle", "Lights", "Heater" etc 

Effectively with this device you have the control of you entire home right in your pocket.

Control web, server control, web based,control application, iot, internet of things, power ethernet, wireless switch, power outlet control, phone controlled, app controlled, home automation, ip power, light remote, control switch, switch internet, pdu, remote pdu, remote outlet, network controlled, power outlet control 

Catalog: 

Price: $59.99

Android app development Kit for Starters

Description: 

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 (3.0 or later) mobile/tablet with Bluetooth


4 Step Tutorial

tags: developers android, android development, android sdk, app development, mobile development, android books, started with android, android programming, android application development, learn android, make android, app tutorial

Catalog: 

Price: $129.00

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