500+ DIY Arduino Projects with Code & Circuit Diagram

Arduino is a popular open-source development board used by engineers, hobbyists, and makers to develop electronic projects and prototypes easily. 

The below list consists of a large collection of free Arduino Projects that was built by us here in Circuit Digest. All the projects that we have provided here consist of neatly illustrated Arduino circuit diagrams and detailed explanations, the relevant Arduino code is also provided for a complete do-it-yourself tutorial. If you want more projects you can also check out our collection at Arduino IoT Projects | Arduino Robotics Projects | Arduino AI Projects | Arduino Home Automation Projects | Raspberry Pi Projects | ESP32 Projects

In this project we are using the concept of ADC (Analog to Digital Conversion) in ARDUINO UNO. We are going to use a Hall…

In this tutorial we are going to design a system to read the ID of RFID cards. RFID stands for Radio Frequency Identification.…

In this tutorial we are going to control a servo motor by ARDUINO UNO. Servo Motors are used where there is a need for accurate…

In present time almost all the people are familiar with robots. Robots play a very important role in human life. Robots…

This LED DIMMER is an Arduino Uno based PWM (Pulse Width Modulation) circuit developed to get variable…

In ARDUINO we have 20 I/O pins, so we can program 20 pins of UNO to be used as either input or output. Although there are more…

In this arduino based project, we are going to build a temperature-controlled fan using Arduino. With this circuit,…

Robots are playing an important role in automation across all the sectors like construction, military, medical, manufacturing,…

Humidity and temperature are common parameters to measure environmental conditions. In this Arduino based project we are going…

ARDUINO UNO is an ATMEGA controller based board designed for electronic engineers and hobbyists. Arduino based program…

After designing this line follower robot using arduino uno, I have developed this computer controlled robot. It can be…

You must have seen automatic door openers in shopping malls and other commercial buildings. They open the door when someone…