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

June 23, 2015

While LPG is an essential need of every household, its leakage could lead to a disaster. To alert on LPG leakage and prevent…

June 18, 2015

Line follower Robot is a very simple robot that follows a line, either a black line or a white line. These type of robots are…

June 16, 2015

Thermometers are useful apparatus being used since long time for temperature measurement. In this project we have made an…

June 7, 2015

In this tutorial we are going to interface a DC motor to Arduino UNO and control it's speed using PWM (Pulse Width Modulation)…

June 6, 2015

In this tutorial we are going to interface a seven segment display to ARDUINO UNO. The display counts from 0-9 and resets…

June 5, 2015

In this tutorial we are introducing concept of ADC (Analog to Digital Conversion) in ARDUINO UNO. Arduino board has six ADC…

June 4, 2015

To establish a good communication between human world and machine world, display units play an important role. And so they are…

June 4, 2015

Arduino has become the most popular Microcontroller among students and hobbyists in very less span of time. So everyone try to…

June 3, 2015

DC motor is the most used motor in Robotics and electronics projects. For controlling the speed of DC motor we have various…

June 2, 2015

In this project we are going to interface RGB (Red Green Blue) LED with Arduino Uno. A typical RGB LED is shown in below figure…

June 1, 2015

The name Arduino is typically buzz word among most of the electronics students or hobbyists alike. Its ability to build things…