MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Every week, we publish 2 to 3 projects, sometimes even more! They range from simple circuits for beginners, to advanced projects that you can use to develop complete innovative products! Most projects have been developed by enthusiasts like you. Some by experts. And, some by our team. Many are tested at EFY Labs, and some are not–but they typically have a proof-of-concept video.
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.
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...