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.
12V Battery Absorb and Float Charger
Most battery chargers stop charging the battery when it attains its maximum charging voltage set by the circuit. This 12V battery charger circuit charges...
Raspberry Pi Real-Time Face Recognition Doorbell
In this DIY project, we are going to build a Raspberry Pi face recognition smart doorbell that identifies the person on the door, for...
5W Stereo Audio Amplifier
Here is how we can build a 5W stereo audio power amplifier based on TEA 2025 IC and two potentiometers for left and right...
Control Robotic Car With Voice
This project describes the implementation of a voice-controlled robotic car using Arduino. In this project, the user gives specific voice commands to the robot...
Distance Counter
Presented here is a simple pedometer (Distance Counter) circuit. It measures the distance covered by you while walking. It may not work very well...
Build Non-Contact Type Digital Tachometer
A tachometer measures the rotation speed of motors and other machinery. There are various types of tachometers. Described here is a digital non-contact type...
Real-Time Face Detection and Recognition for Security Purposes
This article demonstrates real-time training, detection and recognition of a human face with OpenCV using the Eigenface algorithm. Let us construct this OpenCV Face Recognition...
PC-based Oscilloscope Using Arduino
Oscilloscopes are an essential tool for electronics hobbyists and professionals to verify that their designs would work as expected. PC based Oscilloscope score over...
RFID-Based Automatic Desktop/Mobile Phone Login Device
We have so many login passwords to remember in order to access our laptops, emails or online banking. And forgetting password is something that...
Speed Control Of DC Motor Using Pulse-Width Modulation
Pulse-width modulation (PWM) or duty-cycle variation methods are commonly used in speed control of DC motors. The duty cycle is defined as the percentage...
Make This Simple Graphical LCD Scope
This scope reads input signal and displays the output waveform on a graphical liquid crystal display (GLCD) having 128×64-pixel resolution. The signal is fed...
Force-Operated Toy Organ
This toy organ for children uses a readily-available force-sensitive resistor (FSR) and an NE555 timer IC. Resistance of the FSR varies with the amount...
Wireless LCD Display Via Bluetooth
This wireless LCD display shows information sent from a smartphone. The user can send text messages with up to 32 alphanumeric characters to the...
ESP32 (Non-Standard) GPS Receiver
Introduction
GNSS – GG-1802 ($5 a piece)
Sometimes things do not fall in place and we curse ourselves for taking the wrong turn or making the...
Digital Frequency Meter Using Arduino
This article describes the implementation of a digital frequency meter using Arduino Uno to determine the sinusoidal frequency signal in the range of 20Hz...
ESP32 LoRa Gateway
In a boiler safety project, we completed, in which we are collecting 32 thermocouple readings from the deep of a 500 MW boiler 2nd...
Control With Authentication For Up To Four Devices
This circuit can be used to control up to four electrical devices through a cellphone or computer. The main advantage is that you can...
10-Watt Audio Amplifier Using LM1875
Here is a simple 10-watt audio amplifier using IC LM1875. The IC has five pins and can deliver a maximum of 18-watt output power...