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

Road accidents became a matter of concern due to the huge increase in traffic. The primary cause of accidents is due to the…

When it comes to liquids, turbidity is an important term. Because it plays an important role in liquid dynamics and is…

In this article, we will learn how to build a touch-based color-changing plant using Arduino. When you touch the plant, the…

In recent years, robotics has witnessed significant advancements, enabling the creation of intelligent machines that…

In this tutorial, we'll guide you through interfacing an Arduino with an ultrasonic sensor…

In this tutorial, we are going to design an Arduino Uno based Robotic Arm from some cardboards and servo motors…

Nowadays visual indication is a must feature for any electronic device, which will make user interaction much easier. There are…

The biggest crisis we are heading into is the climate change due to excessive use of fossil fuels and to overcome these…

A flex sensor is a low-cost, easy-to-use variable resistor that is designed to measure the amount of deflection it experiences…

Adding sounds or music to our project will always make it looks cool and sounds much more attractive. Especially if you are…

The soil moisture sensor is the first thing that springs to mind when it comes to building your smart irrigation…

Voice Controlled Home Automation Using Arduino is an exciting project that aims to automate…