MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Every week, we publish 2 to 3 projects, sometimes even more! They range from simple circuits for beginners, to advanced projects that you can use to develop complete innovative products! Most projects have been developed by enthusiasts like you. Some by experts. And, some by our team. Many are tested at EFY Labs, and some are not–but they typically have a proof-of-concept video.
Demo Circuit for Over-Voltage Protection
Over-voltage protection circuits are used to protect voltage-sensitive loads. Voltage transients may occur due to a number of reasons such as transformer switching, load...
Propeller Message Display with Temperature Indicator
Here we describe a microcontroller-based propeller display that displays any message sent to it via hyper-terminal of a personal computer. Moreover, a temperature sensing...
Dual Motor Control for Robots
Presented here is a simple circuit that can drive two motors for a small robot, allowing the robot to negotiate an obstacle course. Two...
Stereo audio Distribution Buffer for headphones
Most audio signal sources have only one stereo output, which means they can drive only a single pair of headphones with a resistance of...
Wireless PA for Classrooms
In large classrooms, many a times the teacher’s voice is not audible to students in the back rows. So the teacher have to literally...
Stop Clock With Battery Backup
Stop clock is widely used in various fields to measure the timing of events. Science laboratory experiments, such as measurement of discharge rate of...
EEPROM Interface for Beginners
Electronic systems today incorporate a number of peripheral ICs that have to communicate with each other and the outside world. To maximise hardware efficiency...
Semiconductor Relay for Automotive Applications
Semiconductor relays provide the same function as electromechanical relays but have no moving parts, which increases their long-term reliability. These relays provide an array...
Part 1 of 3: USING AVR MICROCONTROLLERS FOR PROJECTS
The AVR 8535 microcontroller and its new version ATmega8535 are versatile, high-performance but low-cost chips. This article series covers typical applications of this processor...
Electronic Circuit Prototyping More Than Just An Artefact
Certain doubts in the design of an electronic product can be cleared by building and studying a prototype first. Here we discuss the challenges...
AC-Powered Led Lamps Without rectifiers
Usually, LED lamps require rectifier when connected to the AC mains power supply. Electrical isolation of the LED lamps from the mains is also...
Bedwetting Alarm
Bedwetting is one of the most common childhood problems that can have a significant impact on a child’s health if left unattended. During the...
Dummy Load for Amplifier Testing
If you want to test an audio amplifier, here is a compact fan-cooled dummy load that can be used to provide any of the...
Multifunction Power Supply
Many embedded systems these days need +5V power supply with some special functions such as power-fail detection, zero-crossing signals for mains power supply and...
GSM-based Dot-Matrix Display
Nowadays, LED message displays are becoming very popular for transmitting information to large groups of people quickly. These can be used indoors or outdoors,...
Cable Tester
Have you ever wondered if a particular cable is delivering mains power supply to your device or not? Here is a solution that helps...
Cupboard Light
Here is a simple circuit that can temporarily illuminate your cupboard or other such usually dark places where mains connection is either not possible...
Simple Antenna Preamplifier for AM Radios
AM radios are still used for capturing transmissions from long distances (DX reception). But AM radios normally require long (10-30m) outdoor antennae. That is...