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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!
Playing with Robotic Eye (IR Sensors)
There are various applications of IR sensors such as TV remote controllers, burglar alarms and object counters. Here we have used IR sensors (infrared...
Digital Timer Enhancement
This simple circuit automatically activates or deactivates an electronic device at the time of alarm preset in a clock. When the alarm rings, the...
Solar Battery Charging Indicator
Here is a battery charging indicator circuit of a simple charging monitor that indicates whether the storage battery of a solar power unit is...
Digitally Adjustable Dancing Lights
You might have come across several types of adjustable dancing lights (flickering LEDs). Most of them use presets (variable resistors) to adjust the rate...
PC-Based Wireless Control for Toy Car
Here we show how you can control a wireless toy car through your PC’s serial port using a pair of ASK transmitter and receiver...
Low-cost Stopwatch
Here is a simple circuit of a low-cost stopwatch that can count up to 99 seconds. The circuit uses CD4060, CD4013, CD4033, LTS543 and...
Square Root Generator Circuit
This square root generator circuit generates the square root of the input at a reference voltage. Such type of square-root output is normally used...
PC Power Manager
Very often we forget to switch off the connected peripherals like monitor, scanner and printer while switching off our PC. This leads to needless...
Crystal AM Transmitter
Here is the circuit of a medium power AM transmitter that delivers 100-150 mW of radio frequency (RF) power.
AM transmitter circuit
At the heart of...
Digital Soil Moisture Tester
Here is a simple and compact digital soil moisture tester to check whether the soil is dry or wet. It can also be used...
Versatile Probe
You can use this versatile probe for continuity testing and identification of transistor type and transformer windings. The N-side or P-side of a transistor...
Multitone Siren
This multitone siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more ear-catching than a...
Overheating Indicator for Water Pipe
This circuit monitors the temperature of the water pipe. If the temperature of the pipe goes above certain limit, it flashes an LED.
Sixth Order Butterworth Low Pass Filter
Low-pass filters are widely used in the audio domain. Their most important application is in communication receivers and communication audio circuitry. These filters, when...
Smart Laptop Docking Station
You can easily convert your ordinary docking station into a smart electronic laptop docking station with an anti-theft alarm. The circuit presented here can...
Multi-utility flashlight
This multi-utility flashlight consists of three sections: a flasher, a sound-to-light display and a white LED-based flashlight.
Multi-utility flashlight circuit
The flasher circuit is built around...
White LED Light Probe for Inspection
This white LED light probe circuit is useful for inspecting narrow spaces like the inside of the CPUs, monitors, PCB modules and other electronic...
Digital Night Vision Goggle
At night, on highways, the high-intensity light from the headlight of heavy vehicles blinds oncoming light vehicle drivers (bike riders and car drivers) for...