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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!
Intruder Detector Using Laser Torch
Here is a simple, low-cost intruder detector using laser torch to detect the intruder. The laser beam is produced using a 3V DC or...
Low-Cost Hearing Aid Using IC 741
This low cost hearing aid circuit offers the advantages of high sensitivity, low current consumption and light weight.
Audio signals are sensed by the condenser...
TV Pattern Generator
This single-IC TV pattern generator is useful for fault finding in TV sets. You can correct the alignment of the timing circuits of the...
Mains Interruption Counter with Indicator
This mains interruption counter circuit counts mains supply interruptions (up to 9) and shows the number on a 7-segment display. It is highly useful...
Resistance Measurement Using Sample and Hold Method
A sample and hold circuit, as the name implies, samples an analogue input signal and holds its value until the input is again sampled....
Digital Thermometer
This digital thermometer can measure temperatures up to 150C with an accuracy of +_1C. The temperature is read on a 1V full scale-deflection (FSD)...
Solidstate Signal Lamp
This solidstate signal lamp is a good alternative to revolving mechanical signaling lamps used in ambulances. It uses ultra-bright blue LEDs for signaling. However,...
PC Driven LED Display
Here is a PC driven LED display circuit to generate sequentially running light effects using a simple program written in C. The output of...
Parallel Telephone with Secrecy and Call Prevention
This parallel telephone circuit provides secrecy when two or more telephones are connected in parallel to a telephone line. The circuit also prevents incoming...
False Triggering Eliminator for Timer 555
Normally, false triggering of timer IC 555 takes place during power on, resulting in unwanted output, which starts the timer’s time cycle. The circuit...
ESP8266 Based Wireless Web Server
This ESP8266 based wireless web server project is built around an arduino. Currently, ESP8266 is gaining popularity in the field of electronics because it...
Garage Light and Security Control
Useful for vehicle owners, this garage light control & security system automatically turns on indoor/outdoor garage lights and raises an alert when an automobile...
5-Band Graphic Equaliser
This graphic equaliser uses low-cost op-amps. Good quality op-amps powered by a single voltage supply are readily available in the market. The op-amp should...
Lead-Acid Battery Charger With Voltage Analyser
Nowadays maintenance free lead-acid batteries are common in vehicles, inverters, and UPS systems. If the battery is left in a poor state of charge,...
IR Remote Switch
Imagine the convenience of selecting TV channels using your remote and then pointing the same remote to your switchboard to switch on/off the fan...
LED Hourglass Timer
This circuit (Fig. 1) simulates the old hourglass timer. A total of 32 LEDs create the effect of sand grains passing from the upper...
PWM Based Speed Control for DC Motors
There are several methods for controlling the speed of DC motors. One simple method is to add series resistance using a rheostat. As considerable...
Number Guessing Game
This number guessing game is quite simple. In this game the player thinks of any number between 1 and 99. Then he scans the...