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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!
White LED Based Emergency Lamp and Turning Indicator
White LEDs are replacing the conventional incandescent and fluorescent bulbs due to their high power efficiency and low operating voltage. These can be utilised...
IR Receiver Module Tester
Here is an IR receiver module tester for on-board testing of IR modules used for remote control of TV sets and VCD players. The...
IR Music Transmitter and Receiver
This IR music transmitter and receiver contains two circuits - one transmitter and one receiver. The transmitter transmits musical tones through an IR LED and the receiver receives those signals through a photo transistor.
Safety Guard: Time Delay Circuit
When voltages suddenly changes, the change is not smooth, it may go on fluctuating for a short while. This may not be a good...
House Security System
This is a circuit for a home security system that sets off an alarm when someone interrupts a laser beam that continuously falls on LDR of the circuit. A combination of 6 plain mirrors is used to direct the laser beam around the house to form a net.
Shock Warning Circuit
Electrical leakage can cause lethal shocks. But such an unfortunate situation can be avoided with this shock warning system. It uses minimal number of...
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...