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.
Add-on USB Power Circuit For UPS
Most computer UPS have only 230V output and no USB output. Presented here is a USB power circuit that gives 5V USB output using...
Connected Message Lamps using ESP8266 | IoT Projects
It is not just another Engraved LED lamp that you see on the market nowadays. This is an advanced version of that lamps. In...
Solid State Voltage Stabiliser
In India, we have a large power distribution system with heavy distribution losses and variations in industrial/ domestic load. This results in voltage variations...
Car Stereo Player Circuit
Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful...
1-30 Minute Timer
Using this 30 minute timer circuit you can switch on an appliance for a desired time. The circuit provides selectable time settings of 1,...
Car Fan Speed Controller
Using this fan speed controller circuit you can control the speed of 12V DC fans used in cars. The circuit is built around timer...
Mini UPS System
This mini ups circuit provides an uninterrupted power supply (UPS) to operate 12V, 9V and 5V DC-powered instruments at up to 1A current. The...
Duophone: Multiple Numbers Through One Telephone
This simple circuit of a duophone allows you to access two telephone lines through one telephone set. Each telephone conversation will remain entirely separate...
IR Based Light Control
This IR-based light control circuit turns on the lights at the portico, car parking or other areas when a motorbike or car enters through...
Motion Sensor for Security Light
Here is a motion sensor system based on PIR motion detector module BS1600 (or BS1700) that can be used for security or corridor lighting...
Water Overflow Alarm
This water overflow alarm is built around two BC547 transistors and two 555 timer ICs
Generator Room Light
At night when power fails, one finds it difficult to reach the generator to start it. Here is the circuit for a generator room...
Photometer
An illuminance of 100 to 1000 lux is required for reading and doing close work without eye-strain. Specular illumination or bright sunlight provides 50,000...
Leakage and Continuity Tester
Here is a simple, chargeable leakage and continuity tester that can be operated in two modes: normal mode and gain mode. The gain mode...
Electronic Dice Using AT89C2051
This simple AT89C2051 based electronic dice circuit demonstrates the capability of an AT89C2051 microcontroller chip to function as a random number generator based on...
Pyroelectric Fire Alarm
Here is an ultra-sensitive fire sensor that exploits the direct piezoelectric property of an ordinary piezo element to detect fire. The lead zirconate titanate...
Parallel-Port Controller Using MATLAB
Many projects have been published in EFY on how to program a PC’s parallel port using C, C++ and Visual Basic. Here we attempt...
Triple Mode Tone Generator
Here is a simple triple mode tone generator circuit that generates three different tones. You can use it as a call bell, burglar alarm...