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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!
Raspberry Pi Based SMS Server
Until recently, for sending an SMS we had to use third-party services from the Internet. We had to log on to a third-party server,...
Automatic USB-Controlled Power Switch
Almost all electronic gadgets now come with one or more USB ports. You can use the USB port as an automatic switch to control...
Door-Opening Alarm Using Hall Sensor
This simple door opening alarm using hall sensor produces sound when someone opens the door. The circuit can be installed at a workshop, office...
Wireless Baby Monitor Circuit
This wireless baby monitor circuit using FM is designed to operate at a frequency of 100MHz. Its range of transmission is more than 100...
Programmable Power Supply With TL431
TL431 and LM431 are relatively low-noise, stable and low-cost shunt regulators. These can be used to build all sorts of power supplies including programmable...
Light-Sensitive Fire Alarm
This light sensitive fire alarm circuit is extremely sensitive, low-cost and easy to assemble even by a beginner. It uses infrared photo transistor as...
Simple 12V, 1A SMPS
Most electronics enthusiasts require DC power supplies to operate various devices and accessories. The most popular and common supply is a 12V DC supply...
LME49710 Based Audio Amplifier
Listening to music on a self-made system is great. Good-quality audio amplifier circuits can be constructed with minimum components. Described here is an LME49710...
Dimming LCD Backlight
Presented here is a power-saving LCD backlight control circuit. An LCD is used in many projects for indication or information display since it consumes less...
Fastest Finger First Indicator
Quiz-type game shows are increasingly becoming popular on television these days. In such games, fastest finger first indicators (FFFIs) are used to test the...
GSM Based Messaging Using Arduino
Today, GSM networks are widely-used, whether for making calls or sending SMSes. But some places need urgent messages like in colleges, railway stations, events,...
Gas Leakage Alarm
LPG gas is supplied in pressurised steel cylinders. As this gas is heavier than air, when it leaks from a cylinder it flows along...
Real-Time Multiple Colour Tracking
This project uses the fundamentals of computer vision to track three different colours: red, blue and yellow. When you run this program, a camera...
Electronics Projects: Simple Line-Following Robot
Generally, line follower robot is microcontroller-based. Here we describe a line follower robot without microcontroller for those who are not familiar with microcontrollers. It...
Universal Power Supply
Linear regulators like LM317, LM337, 78xx and 79xx, Zener diodes (1.3W) and reference diodes (e.g., LM336) are quite inexpensive and widely available. So you...
Visitor Counter
Presented here is a simple counter circuit that counts the number of visitors entering or exiting an auditorium or any other place where you...
Stress Meter | Circuit Diagram With Full Explanation
This stress monitor lets you assess your emotional pain. If the stress is very high, it gives visual indication through a light-emitting diode (LED) display along with a warning beep. The gadget is small enough to be worn around the wrist.
Simple Low-Cost Visitors Counter
Here is a simple and inexpensive visitor counter circuit that you can build easily. Visitor counters available in the market are generally expensive and...