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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!
Versatile LED Display
This versatile LED display circuit uses an erasable programmable read-only memory (EPROM) to display various light patterns on LEDs. Since bicolour LEDs (comprising green...
Chant Player
Chanting combines singing and music with mantras. The sweetness of chanting stills the mind, dissolves worries and opens the heart. Chanting forms an integral...
Electronic Street Light Switch
Here’s a simple and low-cost street light switch. This switch automatically turns on the light at sunset and turns it off at sunrise. The...
Sound Operated Intruder Alarm
When this sound operated intruder alarm detects any sound, such as that created by opening of a door or inserting a key into the...
Twilight Blinker Lamp
During sunset or sunrise, the ambient light is not adequate to lead you through the open doorway or make your way around obstructions. To...
Multipurpose White LED Light
Standard fluorescent lamps and their smaller versions called compact fluorescent lamps (CFLs) radiate light in all directions (360°) and tend to increase the room...
Soldering Iron Temperature Controller
When soldering, sometimes the need arises to control the temperature of the soldering iron. It is not possible to change the solder iron every...
Noise Meter
Normally, sound intensity up to 30 dB is pleasant. Above 80 dB, it becomes annoying. And if it goes beyond 100 dB, it may...
Automatic Heat Detector
This automatic heat detector circuit uses a complementary pair comprising NPN metallic transistor T1 (BC109) and PNP germanium transistor T2 (AC188) to detect heat...
Musical Alarm Timer
A timer is a specialised type of clock for measuring time intervals. Here we present a simple musical alarm timer that can be used...
Low-Cost Hearing Aid
Commercially available hearing aids are quite costly. Here is a low-cost hearing aid circuit that uses just four transistors and a few passive components.
On...
Keychain Light
A keychain light with white LED comes in handy to help you at your front door or search your valuables in the dark. The...
PC Based Candle Igniter
Here’s a PC based candle igniter system that lets you light up a candle using matchsticks by just pressing the ‘Enter’ key on the...
Flashing Headlight for Motor bikes
The dipper for a vehicle’s headlight changes the light from high beam to low beam or vice versa given a particular set of road...
Car Fault Indicator Alarm
Here’s a car fault indicator alarm circuit that sounds an alarm if your turn indicator lamps doesn’t glow, helping you to safeguard against any accident...
Electrolytic Capacitor Tester
Using this electrolytic capacitor tester you can detect leaky and dead (open) electrolytic capacitors. It operates based on the time constant (T) of the...
Mains Box Heat Monitor
This simple mains box heat monitor circuit monitors the mains distribution box constantly and sounds an alarm when it senses a high temperature due...
LED Torch
LEDs are becoming increasingly popular in many lighting applications. White LEDs are now common in torches. Here’s a simple and economical LED torch that...