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

Sound direction detection is a fascinating concept in robotics and automation. It allows a device to "hear" and determine the direction of a sound…

Stress is a significant contributor to various health issues such as heart disease, high blood pressure, diabetes, and…

Our IoT-Based Smart Bin project features a custom-built IoT system and Firebase database, using the Arduino Uno R4 WiFi…

IntelliCart is a smart shopping cart system designed to transform the shopping experience by automating the checkout…

PRAVESH is an RFID-enabled Smart Entry-Exit System designed to replace manual logs with a seamless digital solution.…

The main idea of this project is to develop a test bed for Industrial Internet of Things to monitor parameters like…

This project is a compact and interactive reaction-time training device, which has been developed with two versions to…

Impact Statement 

This project implements AI based cardiovascular disease prediction from the ECG waveform along…

This is a very interesting project in which we are going to learn how to implement virtual reality using Arduino and Processing…

Snake Game has been very popular since the beginning of the Mobile phones. Initially it was come in Black and white cell phones…

In this project, we will build a remote-controlled Arduino Air-Boat that can be controlled wirelessly using the 433 MHz RF…

Arduino has always helped to build projects easily and make them look more attractive.  Programming an LCD screen with…