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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!
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...
Precision 1Hz Clock
This precision clock uses just two ICs and one junction field-effect transistor (JFET) in conjunction with a commonly available crystal and a handful of...
RJ45 Cable Tester
Described here is a simple RJ45 cable tester circuit which can be used for testing the RJ45 network cables. The circuit can check...
8 Digit Code Lock for Appliance Switching
This 8 digit code lock is useful for appliances requiring exclusive or authorised use by those who know the preset code. If desired, the...
Light Operated Internal Door Latch
Using this light operated door latch circuit, you can close or open the door of your room remotely from your bed. You just have...
Cellphone Controlled Audio/Video Mute Switch
The circuit automatically disconnects power supply to the audio/video system whenever the mobile handset is lifted off the holder for making or receiving a call.
Dome Lamp Dimmer
A reading light inside the car greatly assists passengers during night, but often the interior dome lamp is too bright and distracting to the...