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

June 14, 2019

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

June 12, 2019

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

June 10, 2019

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

June 4, 2019

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

May 28, 2019

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

May 23, 2019

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

May 21, 2019

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

May 14, 2019

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

May 10, 2019

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

May 9, 2019

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

May 7, 2019
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…
April 27, 2019

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