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

In a present-day scenario, we all are so busy with our work that we don't have the time for cleaning our house properly. The…

Nowadays most of the car comes with keyless entry and push-button ignition system, in which you only need to carry the key in…

We are living in the era of 5G and 5G-enabled devices; however, old technologies like the walkie-talkie system and RF…

Robotic Arms are one of the fascinating engineering creations and it is always fascinating to watch these things tilt and…

There are many pulse-oximeter sensors available in the market for medical purposes, and in one of our previous projects,…

In this tutorial, we are going to build a handheld game console using Arduino Pro Micro, Arduboy package, and a handful of…

Digital load scales are another miracle of modern-day engineering and design. Yes, we are talking about the weighing scale we…

Ultrasonic sensor, also known as a SONAR sensor is an electronic device that is used to measure the distance of a…

In 2019, Arduino Platform introduced Arduino Cloud IoT which is an end-to-end solution to help IoT enthusiasts and…

The need for home security alarm systems nowadays is a serious demand. As the number of crimes is increasing every day, there…

In this project, we will be exploring AD8232 ECG sensor working and will connect it with Arduino to…

Most connected IoT devices today are connected to the internet using a Wi-Fi connection. Although a Wi-Fi connection enables…