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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!
Programmable LED Indicator
In this circuit, IC CD4017 has been used to program a bicolour LED indicator in 10 different modes which can be selected with a single push-button switch.
Wire Break Alarm With Delay
Here is a simple circuit of wire-break alarm that activates after a delay of 15 to 30 seconds. When the thin-wire loop running across the entrance door is broken, the alarm sounds after a delay of 15 to 30 seconds, the time period set through VR1.
Automatic Switch-off Battery Charger
Presented here is an automatic switch-off battery charger based on a 555 timer IC. This smart charger automatically switches off when your rechargeable batteries...
Car Porch Guard
Protect your costly vehicle from theft using this electronic car porch guard system. The system immediately switches on the porch lamp and sounds a...
Pressure Sensitive Alarm
Here is a low-cost, pressure sensitive alarm. The alarm uses a home-made pressure sensor, which works as a variable capacitor using two copper-clad boards...
Electronic Ignition System for Old Cars
In older carbureted cars, the contact breaker (CB) point ignition system is used to fire the spark plugs. You can convert the ignition system...
Security System Switcher
This is a circuit for a security system that can detect movement of any intruder through a transducer and activate any security device through a relay.
Digitally Controlled Precision Amplifier
This is a circuit for a precision amplifier with digital control that can provide a gain upto 100.
PC Multimedia Speaker
This is a circuit for USB compatible low cost and low power multimedia speakers for PC.
Stabilized Power Supply for Prototyping
This stabalised power supply circuit may be directly connected to 230V AC mains to derive output voltages of 3V to 12V DC for connection to the prototyping board.
Solar Lighting System
The world cannot continue to rely for long on fossil fuels for its energy requirements. Fossil fuel reserves are limited. In addition, when burnt,...
Fire Alarm
With the onset of summer, chances of fire accidents increase. Such fire accidents can be prevented if timely alarms are available. The fire alarm...
Mains Failure/Resumption Alarm
This mains indicator sounds an alarm whenever AC mains fails or resumes. It is very useful in industrial installations, cinema halls, hospitals, etc. The...
Remote Control Tester
Here is a simple remote control tester for checking the basic operations of an infrared remote control unit. It is low cost and easy...
Multidoor Opening Alarm with Indicator
This door opening alarm alerts you of intruders. You can use it for up to three doors. You simply need to fit a small...
Musical Touch Bell
Here is a musical call bell that can be operated by just bridging the gap between the touch plates with one’s fingertips. Thus there...
Visual AC Mains Voltage Indicator
You should not be surprised if someone tells you that the mains voltage fluctuation could be anywhere from 160 volts to 270 volts. Although...
Smart Cellphone Holder
This smart cellphone holder makes sure that you don’t forget to carry your mobile phone. Fitted in the car, it keeps searching for the...