Build A Filter and Polarity Guard for AC/DC Adaptors
Presented here is a simple filtering and polarity reverse protection guard for AC/DC power adaptors. Wall adaptors have many advantages because these are low-cost,...
Protect Yourself With This Noise Level Monitor
Presented here is an Arduino-based noise/sound level monitor that displays sound levels in decibels (dB) and corresponding voltage levels on an LCD. A noise...
Make This Simple Tester For Operational Amplifiers
This is a simple tester with square-wave oscillator for single and dual operational amplifiers (op-amps). These op-amps are widely used in different projects. You...
Automatic Ambient Light System With IoT Home Automation
Wouldn’t it be amazing if our room light automatically adjusts its brightness according to our needs? Or if we can control the brightness of...
Stop Tank Overflow With This Wireless Water-Level Indicator-Cum-Controller
Described here is an electronic system for stopping tank overflow. It is capable of keeping the water-level between any two of the eight predetermined...
Hacking Bluetooth Headset To Control A Robot
In this project, an old Bluetooth headset can be used, along with a cellphone to make a robot controller, without a microcontroller (MCU) or...
Monitor Light Level In Underground Mines And Caves
This circuit monitors light in surrounding areas at all times, displays light level on the LCD and sounds an alarm when light level becomes...
Electronic Candle
Electronic or flameless candles are an alternative to traditional wick candles. These are used for home décor and do not carry the risk of...
Wi-Fi & Bluetooth Mesh Enabled IOT Smart Device For Athletes
This device can provide real-time data of the movements of players during trainings and games, like acceleration, angle and directions, as well as their...
Dual-Colour Stroboscope
Stroboscope is a device used to make a cyclically moving object appear slow-moving or stationary. This is realised by illuminating the object intermittently with...
Make Your Own Joystick for Robot
Here is a simple joystick to control a robot to move in forward, backward, right, left, clockwise (CW) and counter-clockwise (CCW) directions using six...
Make Your Own ESP8266-12E/F Module Programmer
This article describes a method for making an ESP8266-12E/F module programmer and also discusses the support circuitry required for real-time applications.
NodeMCU board is a...
Home Automation System For Up To Four Devices
This project is designed to control up to four home electrical devices using Node-RED, Raspberry Pi and local Wi-Fi network. Node-RED is a flow-based...
Appliance Guard To Prevent Damage
This circuit monitors the AC current flowing through an electrical appliance and automatically turns the appliance off when the current goes beyond maximum or...
Temperature Based Fan Speed Control Using Arduino
This project offers a stand-alone, automated fan speed controller that intelligently adjusts the fan speed in response to temperature changes.
Using embedded technology, this closed-loop...
Control Robotic Car With Voice
This project describes the implementation of a voice-controlled robotic car using Arduino. In this project, the user gives specific voice commands to the robot...
Distance Counter
Presented here is a simple pedometer (Distance Counter) circuit. It measures the distance covered by you while walking. It may not work very well...
Build Non-Contact Type Digital Tachometer
A tachometer measures the rotation speed of motors and other machinery. There are various types of tachometers. Described here is a digital non-contact type...