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 our previous tutorials, we have learned about How to interface GPS module with Computer, how to build a Arduino GPS…

In this project we make a Cool Speedometer for bikes or any automotives by using Arduino which broadcast…

This is an interesting project in which we explore the power of an Arduino and Android to create a Surveillance device which…

Today we are going to build an Arduino wight machine,  by interfacing Load Cell and HX711 Weight Sensor with Arduino…

In this article, we are going to make a Sun Tracking Solar Panel using Arduino, in which we will use two LDRs (Light-…

Smoke Detectors are very useful in detecting smoke or fire in buildings, and so are the important safety parameters. …

In this article, we are going to Control the Robot Car through the G sensor of our mobile phone and you will be able to move…

In this post we are going to control a Servo Motor using a web browser with the help of Arduino and Wi-Fi module ESP8266. The…

In this project we are going to make a Heart Beat Detection and Monitoring System using Arduino that will detect the heart beat…

Whenever we go out of town for few days, we always used to worry about our plants as they need water on regular basis. So here…

In this project we are going to make an IoT Based Air Pollution Monitoring System in which we will monitor the Air Quality over…

In this tutorial we are going to design an 8x8 LED Matrix Scrolling Display using Arduino Uno, which will show scrolling…