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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!
Resolving Interference in a Crowded Wi-Fi Environment Using BAW Filters (Part 2)
Read part 1
There are any number of strategies that consumers can try to fix interference problems with Wi-Fi in their homes — moving the...
Wireless VU meter
VU meter is a standard device that indicates the signal level in audio equipment. Unlike other devices, this meter doesn't require a physical connection...
Super Simple Intercom
This intercom circuit based on IC LM380 audio amplifier requires very few external components. So the circuit is very easy to assemble.
Intercom circuit
Circuit diagram...
How Not to Run Hot: Overcoming Thermal Challenges in Wi-Fi Front-End Designs (Part 1)
For wireless access points or customer premises equipment (CPE), it can be hard to fully account for thermal management and the parameters affected by...
Interfacing Multiple LCDs With Arduino
Here we describe the interfacing of three 16x2 LCDs with common data lines to an Arduino Uno board. Four data lines of all the...
Water Pump Controller
Here is a simple water pump controller circuit for controlling the water level in an overhead tank. The main components of this pump controller...
Simple Sensitive Remote Control Tester
This handy remote control tester circuit for testing infrared-based remote control transmitters used for TVs and VCRs etc. The circuit is built around 7805 IC,...
Dew-Point Sensor
A dew sensor is used in sensitive electronic equipment like cameras and copiers etc, to protect them from moisture failure by fast detection of...
Bipolar Transistor Tester
This bipolar transistor tester can indicate the type of the transistor as well as identify its base, collector and emitter pins. The circuit is...
Strain Meter
This strain meter shows whether the strain is compressive (reducing the length) or tensile (increasing the length) when an object such as a strut...
Linear Timer For General Use
This simple linear timer can be used to control any electrical appliance that needs to be switched off after a certain time, like a...
Digital Pulse Tester
Here is a small digital pulse tester that can be used to test and troubleshoot digital circuitry. The circuit is essentially a pulse generator...
Laser Based Communication System
In this circuit, an electrical signal is transmitted from one place to another riding over the laser beam.
Object Detection Circuit using IR Sensor
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...