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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!

RGB LED Showcase Light

RGB LEDs are capable of generating a variety of colours by mixing red, green and blue colours. It is sometimes very interesting to replace...

Anti-Petrol Theft Alarm

Petrol/diesel theft of parked vehicles is quite common. Presented here is an audio-visual anti-petrol theft alarm circuit that can help prevent this crime. The...

Mixer and Preamplifier for String Instruments

Most of the small musical bands have up to four string instruments like guitars and violins. The signal from the transducers of these instruments...

Telephone Sentry

It is quite common to find extension phones in homes these days but this kind of convenience also comes with a distinct disadvantage: the...

Multifunction Ozone Generator

Ozone is a triatomic form of oxygen that is highly unstable and as such cannot be stored. It finds various applications in our daily...

A Simple Musical Light

The circuits for musical lights available in the market are highly expensive and based on microcontrollers. Also, their programming is very difficult. Here is...

JavaScript-Based Quick Response Code Generator Interface

Quick response code, or QR code in short, is a special bar code that is usually displayed as a matrix of black modules arranged...

Simple Crystal Tester

Here is a simple circuit that can be used to test a crystal before using it in a circuit. The circuit is built around...

Parked-Vehicle Highway Flasher

Often, at night, a speeding vehicle rams into another vehicle parked at the edge of a highway. Cars have parking flashers, but trucks, buses...

Artificial Neural Network Simulation in Labview and Matlab

Artificial neural network, in essence, is an attempt to simulate the brain. When the user enters the inputs (say, p1, p2 and p3) and...

Microcontroller-Based DC Motor Controller

Motion control plays a vital role in industrial automation. Manufacturing plants in industries like chemical, pharmaceutical, plastic and textile, all require motion control. And...

Solar Lamp With Variable Power Supply And Charger

A simple circuit of a solar lamp with variable power supply and charger is described here. It is useful where mains power failure is...

Simple Morse Code Trainer

Morse code contests are still held in some parts of the world. Practising the Morse code with a simple Morse key kit is interesting. The...

Versatile Object Counter

Object counters are extensively used in industries. Normally, these are made of expensive microcontrollers or processors. For small-scale industries, this means a lot of...

Smart Bicycle Light

JULY 2012: With this circuit built, boxed up and installed in your bicycle, you can look forward to safely riding your cool bicycle at...

Relay Actuating Circuit with Millivolt Sensitivity

Common electromagnetic relays with coil voltage of 5V, 6V or 12V can operate power circuits in the range of 250 to 300 volts and...

Night Lamp From Scrap CFL

Compact fluorescent lamps (CFLs) are available in different shapes and power ratings. These consist of an electronic ballast circuit and a programmable-logic-controlled tubelight. Most...

Simple Stereo Power Amplifier With 7905

79xx is a widely known series of low-cost, fixed-negative-voltage regulators. These integrated circuits are available with output current of 100-150 mA (L series), 0.4-0.5A...
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