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

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…

We have seen numerous examples of Blinking an LED using different Microcontrollers and different programming languages. Today,…

LoRa is getting increasingly popular with the advent of IoT, Connected Cars, M2M, Industry 4.0 etc. Because of its ability to communicate to long…

Self-driving cars and connected vehicles, is sure to change the way we commute in the future. Today companies like Tesla are…

Modbus is a Serial Communication protocol which was discovered by Modicon in 1979 and it is used for transmitting data over…

There are several critical machines or expensive equipments which suffer damages due to vibrations. In such a case, a vibration…

Choosing a communication protocol for communication between microcontrollers and peripheral devices is an important part of…