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 Basic Electronics Projects | Arduino IoT Projects | Arduino Robotics Projects | Arduino AI Projects | Arduino Home Automation Projects | Raspberry Pi Projects | ESP32 Projects

While using the BLE HM-10 module, you must encounter some really frustrating problems like you cannot send or receive AT…

Graphical representation is always helpful to visualize the data and it becomes very easy to find trends and patterns by…

As a kid I was fascinated by a toy music car which gets triggered when you clap your hands, and then as I grew up I wondered if…

When you take your phone in sunshine or in high lighting, then it automatically adjusts the brightness according to the…

In the previous tutorial we learned about Modbus RS-485 Serial Communication with Arduino as Slave. In continuation with that…

Bluetooth is one of the most popular and easy to use wireless technology. Over the few years there have been many upgrades of…

We previously interfaced Joystick with Arduino UNO to understand how it works and controlled four LEDs on its left, right, up…

As the name suggests, color sorting is simply to sort the things according to their color. It can be easily done by seeing it…

Few years back if you were to tell someone that the Geyser and bedroom lights in your home are connected to internet, they…

Development in Arduino and Arduino IDE has always been easy and fun with their simple user interface. The Arduino IDE is open-…

Biometrics has been used as a reliable authentication system for a long time now. Today there exist complex biometric systems…

The multitasking has led the computers to a revolution where one or more programs can run simultaneously which increases…