IR Based Automatic Hand Sanitiser Dispenser
This project is based on an infrared (IR) sensor, which detects the presence of hands and consequently activates the motor pump to dispense alcohol-based...
Make A 9V Battery Adaptor For Arduino Board
Arduino board requires a USB cable connected to a laptop/PC or an external AC/DC adaptor for power supply. If you want a portable Arduino-based...
Make A Simple Capacitive Touch Keyboard With Arduino
Certain shortcuts on your keyboard such as copy, paste or print can definitely simplify your work. And what if you can create these different...
Solar Day Lamp With Battery Backup
This solar day lamp with battery backup can be used in offices, homes, shops, warehouses, temples, etc. It offers a cost-effective way of harnessing...
Automatic Hand-Wash Timer
According to the World Health Organization (WHO) guidelines, people need to wash their hands with soap and water at least for 20 seconds to...
Make This Automatic LED Staircase Light
Going up or down a staircase can be a challenging task at night, especially for kids and elderly people. This Automatic LED Staircase Light...
Portable Solar Lantern Cum Bedlight
This portable solar-powered lantern with auto bedlight for everyday use can be made with easily available components.
The circuit diagram of the portable solar lantern...
This Stereo Amplifier Is Simple To Make
Here is a simple stereo amplifier you can make with a CD6283 audio amplifier and a few passive components. It provides an output of...
Build A Universal AC/DC Booster, Audio Amplifier Cum Line Driver
A universal AC/DC booster, audio amplifier and line driver can be used in sensor circuits, audio signal generators, electrical guitars and so on. Most...
Build This IoT-Based Smart Home Controller Using Blynk
Presented here is an Internet of Things (IoT)-based controller for a smart home. This IoT project can be used to control any four home...
Humidity Indicator and Controller
Presented here is a simple humidity controller and indicator. In industries such as textile, the change in moisture content has a direct impact on...
Human-Machine Interface through Electromyography
Electromyography (EMG) is a technique of recording muscular activities by measuring the potential difference across a muscle of interest. EMG signal acquisition is the...
Versatile Audio-Visual Alarm
This circuit uses a NE555 timer IC, some LEDs, a couple of piezo buzzers and a few other components to produce audio-visual effects as...
Alcohol Level Tester
Drunk driving is a big issue. This simple circuit can help prevent accidents by detecting alcohol concentrations. It's simple to use, inexpensive to manufacture,...
Make Your Own Breadboard Switch-Mode Power Supply
Some breadboard power supplies have adjustable voltage linear regulators to control the required output voltages. Efficiency of the linear regulators decrease as output power...
Make A Hi-Fi Stereo Audio Amplifier Using LA4601
Here is a simple 4W audio stereo power amplifier using a ten-pin LA4601 IC. Only a few passive components, including ceramic and electrolytic capacitors,...
Battery-Discharge Measurement Circuit
Battery-life measurement for a portable system is a time-consuming task and many methods used for it do not give reliable results. Presented here is...
Simple Interface for Digital Sound Synthesis
You can make a digital sound synthesizer, for experimentation with sound equipment or with peripheral devices, using special integrated circuits or digital-to-analogue converters (DACs)....