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

July 7, 2020

COVID19 is really a historic pandemic affecting the whole world very badly and people are building a lot of new devices to…

June 30, 2020

It is very exciting to see something floating in the air or free space that is exactly what an anti-gravity project is about.…

June 26, 2020

With all the technology available to us in recent times, it's not hard to build a safety device for women which will not only…

June 24, 2020

Since the outbreak of Covid-19, infrared thermometers are being used as a screening tool to scan the people at Airports,…

June 18, 2020

A potentiometer is a mechanical device using which one can set the resistance according to the desired value, thus changing the…

May 28, 2020

pH scale is used to measure the acidity and basicity of a liquid. It can have readings ranging from 1-14 where 1 shows the most…

May 7, 2020

HC-05 Bluetooth Modules are the go-to Bluetooth modules for any Arduino project! It’s easy to hook up and code in the Arduino…

April 9, 2020

In previous tutorials, we have covered the basics of FreeRTOS with Arduino and the Queue kernel object in FreeRTOS Arduino. Now…

April 6, 2020

In the previous tutorial, we introduced FreeRTOS in Arduino Uno and created a task for the blinking LED. Now, in this tutorial…

March 27, 2020

In this project, I am going to Interface an Alcohol Sensor with Arduino. Here I have designed an Arduino Shield PCB using…

March 26, 2020

The OS present inside the embedded devices is called an RTOS (Real-Time Operating System). In embedded devices, real-time tasks…

March 24, 2020

Corona Virus (Covid19) is wreaking havoc in the world. Almost every country is suffering from the Corona Virus. WHO has already…