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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!
Touch Based Doorbell
This touch plate doorbell makes use of enhancement-mode MOSFETs forming part of CMOS quad NAND gate CD4007B in conjunction with a detector and Darlington driver stage.
Remote Emergency Alarm for Unmanned Lifts
In unmanned lifts or elevators, sudden power failure cannot be detected from the remote operating room, and this can prove dangerous for the lift...
Bicycle Indicator
The electronic bicycle turn indicator unit described here uses low-cost components and is a good substitute to many commercially available versions. It works in...
Electronic Dice
This electronic dice has no chance of wear and tear but all the features of a wooden or plastic dice used for Ludo game.
Electronic...
Locker Guard
Protect your valuables from burglary using this simple locker guard circuit. It generates warning beeps when someone attempts to open the locked safe. The...
Bell-Cum Light Controller
This is a circuit for a bell and light controller that consists of a doorbell with porch light. When someone presses one switch, the bell rings and the light turns on for 3 minutes. Another switch turns on only the bulb for 3 minutes.
PC Table Lamp
This useful circuit is built around well-known timer IC TLC555. It activates an electric bulb when your PC is switched ‘on’. When you shut down the PC, the lamp also automatically turns ‘off.’
Seismic Sensor
This circuit detects the movements of humans or animals. Whenever it detects any movement, a buzzer starts beeping and a red LED starts to blink.
Water Tank Overflow Indicator
Simple Overflow Stopper For Water Tanks
Stop Tank Overflow With Wireless Water Level Indicator and Controller
Water Level Indicator Circuit (LED...
Mains Supply Failure Backup Light
In the event of a sudden blackout at night, this mains supply failure backup light switches on automatically to provide sufficient light for around...
Versatile Power Supply
Using this versatile power supply circuit, you can obtain the following voltages (approx.) at a current limited to one ampere: 3.3V, 5V, 6V, 9V,...
Atmel AVR ISP Dongle
Atmel’s AVR microcontroller chips are in-system programmable (ISP), i.e. these can be programmed directly in the target circuit. A special programmer software is used...
Smart Switch
To switch on the mains voltage, either a mechanical switch or a relay offers a simple solution. However, the relay and its associated components...
Transistor Tester
With this transistor tester, you can test both npn and pnp transistors using this circuit. The circuit indicates whether the transistor is good, open...
Portable Lamp Flasher
Here is a high power incandescent electric portable lamp flasher. It is basically a dual flasher (alternating blinker) that can handle two separate 230V...
Overspeed Indicator
This speed indicator circuit is designed for indicating over-speed and direction of rotation of the motor used in mini hand tools, water pump motors,...
220V Live Wire Scanner
Presented here is a 220V live wire scanner. The clock input of the IC is connected to a wire, which acts as the sensor....
Telephone Conversation Recorder
This is a circuit for a telephone conversation recorder that can record conversations over the telephone in a tape recorder...