Arduino Projects: 500+ Tutorials with Code, Circuits & Step-by-Step Guides (2025)

Arduino is a popular open-source development board perfect for creating electronic projects. Our collection features Arduino projects with code, circuit diagrams, and detailed explanations for makers at all skill levels. Whether you're looking for Arduino projects for beginners or advanced applications, you'll find complete DIY tutorials below.

Browse our comprehensive collection of Arduino project ideas built by Circuit Digest. Each tutorial includes:

  • » Step-by-step instructions
  • » Downloadable source code
  • » Detailed circuit diagrams
  • » Troubleshooting tips

In today’s modern world we all depend on mobile phones as our primary means of wireless communication. But, we all have faced…

In our previous tutorial we learnt how to install python on our windows machine and how to interface Arduino with python using…

Automatic floor cleaners are nothing new, but they all share a common problem. They all are too expensive for what they do.…

Ammeter is used to measure current flow through any load or device. Here in this Arduino Ammeter, we will explain about…

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…