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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!
DC Changeover System with Battery Protection unit
Emergency lights commonly available in the market come with battery over-charging protection but no discharging protection. Here is a DC changeover system that protects...
Numeric Display Digital Dice
This is a circuit for a digital dice with numeric display that generates random numbers from 1 to 6 and displays them on a 7-segment LCD. The circuit can be modified to increase the range from 1 to 9.
Appliance Timer cum Clap Switch
This is a circuit for an appliance timer cum clap switch that can operate devices with a clap or can switch them on/off by setting an advance timer ranging from one second to 100 hours in advance.
Panic Button
Useful for the elderly and ailing persons, this touch-sensitive panic button circuit sounds a panic alarm to catch the attention of others for immediate...
A Multipurpose Listening Device
This multipurpose listening device can detect very faint, remote sounds with a good clarity. It is useful in large conference halls, auditoria, cinema halls,...
Solid-state Relay
The basic function of a relay is to switch on power to a load using an electrically isolated, low-power control signal. Hitherto, electromechanical relays...
Hidden Alarm Switch
This simple hidden alarm switch produces a warning beep when somebody crosses a protected area in your home or office. The switch, hidden below...
Infrared Electronic Shooting Game
This is a circuit for an infrared electronic shooting game that consists of an IR gun and a target board. It consists of eight red LEDs and a green LED. Green LED lights up when a hit is made at the infrared receiver module and a buzzer sounds.
Touch Sensitive Musical Bell with Timer
Recently musical doorbells have become very common. Musical and continuous power doorbells serve as an attempt to bridge the gap between newer digital circuitry...
Three Colour Display Using Bicolour LEDs
Presented here is a three colour display that uses bi-colour LEDs for display. The circuit is built around two IC CD4017, some transistors & a...
Power Supply Reversal Correcter cum Preventer
When power-supply polarities of an electronic device are accidentally interchanged, the device runs the risk of damage. The danger can be avoided by adding...
Photodiode Based Fire Detector
This ultra-sensitive photodiode based fire detector protects your electronic devices like computer and television set. It uses a photodiode as the fire sensor and...
Audio Controlled Running Light
This mains operated audio controlled running light can be used in discotheques. The lamps glow in running sequence as per the sound of music....
Melody Generator With Instrumental Effect
This is a circuit for a melody generator that can provide various modes of melodies along with instrumental effect that can be chosen through dip switches.
Pulse Generator
This pulse generator circuit is very useful while checking/operating counters, stepping relays, etc. It avoids the procedure of setting a switch for the required...
PC Temperature Controller
Here is a simple temperature controller that turns your personnel computer (PC) off when the temperature of the PC increases beyond the optimal temperature value. Some of the larger integrated circuits become quite hot and if the temperature inside the PC
Musical Light Chaser
This music operated lighting effect generator comprises five sets of 60W bulbs that are arranged in zig-zag fashion. The bulb sets glow one after...
Ultrasonic Proximity Detector
This ultrasonic proximity detector comprising independent, battery-powered transmitter and receiver sections makes use of a pair of matched ultrasonic piezoceramic transducers operating at around...