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.
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...
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...