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Engineering Projects For You

Free engineering project ideas, circuit diagrams and software codes for students and hobbyists. Complete instructions on DIY electronic devices. EFY tested circuits with source codes.

ATMEL AVR ISP DONGLE

Atmel’s AVR microcontroller chips are in-system programmable (ISP), i.e. these can be programmed directly in the target circuit. A special programmer software is used to download the program from the PC into...

PHONE BROADCASTER

Here is a simple yet very useful circuit which can be used to eavesdrop on a telephone conversation. The circuit can also be used as a wireless telephone amplifier. One important feature...

Milliohm Meter

Milliohm meter is used to check low resistance of connecting wires. It can deduce the resistance of thick wires, condition of contacts and the length or quality of wires. Although the...

PIR-Sensor Based Security System!

Passive Infrared (PIR) sensor based motion detectors have become very popular for intrusion detection in homes and commercial places. These sensors could be put to use in places like keyholes, kitchens,...

PC-Based Candle Ignitor

Here’s a PC-based lighting system that lets you light up a candle using matchsticks by just pressing the ‘Enter’ key on the PC’s keyboard. It is especially useful when celebrating such...

Beginners Guide to Resistor Colour Codes

This table will help you with managing resistor colour code, so that you don't burn up your circuit due to a wrong resistor. Right below this image is a little tutorial to...

0-100°C Temperature Detector

Here’s a temperature monitoring system capable of remote temperature reading without transmission losses in the conditioning circuit. The IC AD590 (IC4) is used as a temperature transducer. This semiconductor transducer provides...

Game Station Entry Card Software Using RFID Tags

In this article we describe how to create a game station entry card so that a player can enter the game station only once using that card. A radio-frequency identification (RFID) reader,...

Implementing Capacitive-Touch Interfaces in Low-Cost LED Lighting Designs

In recent months, there has been a move to integrate capacitive-touch and capacitive-proximity user interfaces (UIs) into lighting applications. The simplicity of the UI, the ability to use irregularly-shaped sensors and...

Get started with NOT Gate IC | 7400 Series Tutorials

Logic gates are the basic building blocks of digital electronics. More common ones being the OR, AND, NOR, NAND, EX-OR and NOT gates. Typically, a gate takes input from two input...