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Getting started with the Zerynth App: how to build an IoT Thermometer

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In this tutorial we will develop a simple but powerful Iot thermometer using 32-bit SAM MCU,some mikroElectronika clickboards and Zerynth App.

]]>Zerynth App]]> is a mobile application for Android and iOS that allows fast prototyping of graphical interfaces for your IoT projects.

With Zerynth App you can turn any mobile into the controller and display for smart objects and IoT systems! In particular, you can manage and control the connected devices programmed with Zerynth, enabling a bidirectional communication channel between them and your mobile.

Emergency System for Mine Workers


Pawan Kumar
Emrgency System at MiningMine workers have a harsh job. They have to work deep down the earth. At such depths, they are almost disconnected from the everything and everyone. Even the mobile network does not work at those depths. The loss of connectivity leads to delay in any help in case of a danger or underground mishap. This project is built to detect any danger in advance and relay alert among the mine workers. Though most wireless networks don't work underground, small-distance radio communication can be used in such situation.
The project uses a gas sensor, temperature and humidity sensor and light sensor to detect any sign of danger. The data from the sensors is sent to a computer through radio communication for continuous monitoring.

Plastic Road: A Revolutionary Concept to Build the Roads

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Neha Rastogi
Plastic Road: A Revolutionary Concept to Build the RoadsThe abundance of plastic waste dumped in the environment and its harmful effects call for an urgent action. In response, many countries have actively taken up the responsibility of recycling as much plastic as possible. There are different ways of utilising the recycled plastic, one of them is to utilise it for the construction of roads. 
India is one of the few countries which has already started the use of recycled plastic in road construction from the past few years. In fact, a government order in November 2015 made it mandatory for the road developers in the country to make use of plastic waste alongside bituminous mixes for road construction. On the other hand, some similar projects are being initiated by other countries as well.

Virtual Retinal Display

Written By: 

Shalem Pravas

A machine consists of many sub systems working together to perform a certain task. The information from the electronic devices are retrieved from the machine sub systems as binary code. All this information is presented in a user readable formatthrough a display device. The display technology has seen a rapid growth in the past few decades from the old CRT (Cathode Ray Tube) displays to the presently in demand LCD (Liquid Crystal Display) and LED (Light Emitting Diode) displays. The LCDs and LEDs consists of two dimensional arrays of individual display units (pixels) whose number to size of display determines the clarity of the display (resolution).

Stepper Motor Driving Modes


AM Bhatt

Stepper Motor Driving ModesAny 4 phase unipolar stepper motor can be driven in 3 different modes: Single coil excitation mod, double coil excitation mode, and half step excitation mode. The given project demonstrates how to drive any unipolar stepper motor in these three different modes. It uses arduino UNO board and unipolar stepper motor library to drive the stepper motor.

It also controls speed (RPM) of the motor and displays the current speed and driving mode on LCD. So let us first see the circuit diagram followed by its description and working. Complete functionality of project is because of the program downloaded into arduino board microcontroller ATMega328. The program is the soul of the project. The program (also known as sketch) is written and compiled in arduino IDE software tool.

Building a DIY Water Presence Sensor using Raspberry Pi

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Shalini Verma

Private eye pi is a Raspberry Pi projects website that deals in programming and electronics of building home security. In one of their post, they have explained the process of building a flood or water presence sensor in your house, if you experience water leak in your area on frequent basis causing expensive damages. This sensor is connected to your Private EyePi alarm system which can trigger the alarm or send email alerts.

It provides a dual opportunity where one can wire the sensor directly to the Raspberry Pi or to wireless water sensor. The sensor is designed with pleated strips of metal which change as soon as it detects the presence of liquid and consequently changes the resistance for activating the internal switch. It is mounted at some height with the attached wire along with the wireless sensor or Raspberry Pi.

Arduino Based Air Pollution Control


Pawan Kumar

Arduino Based Air Pollution ControlAir pollution has become a serious issue in the present times. The CO2 level is increasing due to human activities. the effect of pollution is greater in closed spaces like living rooms, cars and offices. This project is developed to detect the level of air pollution and control the pollution level in a restricted area by activating an air purifier as the level exceeds a threshold limit.

The system can be installed in houses, offices or cars. The project is developed in an adaptive manner. The device first takes multiple samples of air and determines a threshold level. If the level of CO2 increases the threshold level, the air purifier is activated through a relay circuit.

Gesture Based Home Automation System


Pawan Kumar

Home Automation is the new trend in a consumer market. There are many home automation systems with different features and facilities. All the home automation systems are used to control home appliances through a remote control. The remote control can be a stationed unit or a wireless remote. The remote used for controlling appliances usually have keys or touch-based sensors.

In this project, a home automation system is designed which can be controlled by gestures. The system designed in this project controls four appliances which are taken 15-watt bulbs for demonstration. The user can select the appliance to be controlled through a display which shows the list of appliances in a drag-able fashion.

Adjustable Constant Current Source (Part 13/13)


Ayush Jain

Adjustable Constant Current SourceA constant current source is used to provide a constant current regardless of the input voltage and output load. These type of circuits are also used as a current limiter. Most electronic devices have a maximum current rating and if current above that rating is drawn by it, the device may get damaged or not work properly.

Therefore a lot of times constant current power supplies are required to operate electronic devices. In this project, an adjustable constant current source which supplies 25 mA constant current at the output regardless of load resistance and input voltage is designed.

Intel Movidius Provides Visual Intelligence Technology to the Ultra-Compact DJI Spark Drone

Submitted By: 

Neha Rastogi

Intel Movidius Provides Visual Intelligence Technology to the Ultra-Compact DJI Spark DroneIntel Movidius, a leading provider of low-power computer vision and embedded artificial intelligence, is offering visual intelligence technology to the ultra-compact DJI Spark, company’s first mini-drone. The Intel Movidius Myriad 2 vision processing unit (VPU) is a unique processor, which accelerates machine vision tasks like object detection, 3D mapping, and contextual awareness through deep learning algorithms.

Discussing the drone, it’s the most compact drone in DJI’s product portfolio. The device uses Myriad 2 VPU for onboard computer vision processing and deep learning algorithms at high speed, enabling applications like sense-and-void, optical tracking, and gesture recognition. DJI has implemented Myriad’s cutting edge vision and deep learning algorithms.