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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!
FM Bug
This FM bug transmitter circuit will let you spy on people. The transmitter can be placed in the desired room and the conversation heard...
Calling Bell Using an Intercom
Here is a simple calling bell circuit that can be used in small offices to call the office boy using an existing intercom system....
Simple Stereo Level Indicator
Usually, low-priced home stereo power amplifiers don’t have output level indicators. An output power level indicator can be added to each channel of these...
Circuit Design Calculator Using ‘C++’
While designing electronic circuits, component values are calculated using formulae from the circuit’s theory. These calculations waste a lot of time. This circuit design...
JavaScript Based Man-Demon Puzzle Simulator
Man-demon puzzle is like a classic river-crossing puzzle. The missionaries-cannibals—one of the river-crossing puzzles—is a well-known game problem in artificial intelligence, where it is...
Rainbow Clock
Here is a simple circuit using different colour LEDs that makes your clock glow in different colours of rainbow. The clock’s dial (shown in...
Buffer and Driver for Square-Wave Signals
Most square-wave generators have a single output that doesn’t have a high driving capability/slew rate or is not adjustable in the required amplitude range....
Phonebook for PC Using Memory Access Functions in ‘C’
Programming languages like ‘C’, Assembly and Java are used in embedded system development. Of these, ‘C’ is most commonly used because it is more...
Phone Bell Auto Silencer
Telephone ringing all of a sudden in the middle of a serious meeting is quite irritating. The automatic bell silencer circuit described here is...
Programmable Industrial On-Off Timer With RF Remote
In most of the modern manufacturing and processing industries, there is complete industrial automation through sophisticated hardware and software like programmable logic controller (PLC),...
Getting started with Raspberry Pi
SEPTEMBER 2012: The Raspberry Pi (Fig. 1) is powered by a BCM2835 system-on-chip from Broadcom that contains an ARM processor (running at 700 MHz)...
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...