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

Arduino has always been a powerful and an easy to use learning/developing platform when it comes to open source hardware…

In this project we are going to make a Buck Converter Circuit using Arduino and N-Channel MOSFET with a maximum current…

With a simple knowledge of Arduino and Voltage Divider Circuit, we can turn the Arduino into Digital Voltmeter and can measure…

CNC Machines are Computerized Numerical Control Machines which are used to draw anything or design any mechanical part…

Stepper motors are increasingly taking its position in the world of the electronics. Starting from a normal Surveillance camera…

In this project, we are going to make an AC Voltage Measuring Device using Arduino, which will measure the voltage of…

Stepper motors are increasingly taking its position in the world of the electronics. Starting from a normal Surveillance camera…

Detecting motions or movements has always been important in most projects. With the help of the PIR Sensor it has become very…

Attendance systems are commonly used systems to mark the presence in offices and schools. From  manually marking the…

We all know about Arduino. It is one of the most popular open source micro controller board which is highly useful for doing…

It’s all started with a small game from the dark ages called “Mario”, right from the time of being a tiny little guy jumping on…

We all are quite familiar with Electronic Voting Machines, where your vote gets registered electronically and you don’t need to…