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Engineering Projects For You
Free electronics projects, circuit diagrams and software codes available for students and hobbyists. Complete instructions on DIY electronic devices also available. These projects have been tested by EFY and are available with source codes. These are helpful with understanding concepts of electronics including basic components. The projects are designed to be helpful for engineering students and professionals building their own designs and circuits. The projects are also compiled from time to time to provide a single destination for project junkies. Let us know how you feel about the content and any thing you would like us to cover in the future. We hope you enjoy the content on this page!
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...
How To Build A Quadcopter?
Quadcopters are becoming more widespread because they are incredibly stable, fast and fun to fly. Newer technologies have allowed development of smaller and cheaper...
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...
Spy Ear
What binoculars do to improve your vision, this personal sound enhancer circuit does for listening. This light-weight spy ear gadget produces an adjustable gain...
Stereo Brick Amplifier
If you are looking for a compact and inexpensive add-on audio amplifier for your digital surround sound system or computer, then this subwoofer amplifier...
Green LED Flashlight with 555 Timer
Here is a simple green LED flashlight built around a 555 timer IC (IC1) and powered from a 3V battery pack.
Green LED-based flashlights are...