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

October 25, 2015

In this tutorial we are going to design a Barometric Pressure Measuring System using BMP180 and ARDUINO. First of all for…

October 25, 2015

Tachometer is a RPM counter which counts the no. of rotations per minute. There are two types of tachometer - one is mechanical…

October 19, 2015

Security is a major concern in our day to day life, and digital locks have became an important part of these security systems.…

October 18, 2015

In this project we are going to interface TCS3200 color sensor with Arduino UNO. TCS3200 is a color sensor which can detect any…

October 13, 2015

Often we see visitor counters at stadium, mall, offices, class rooms etc. How they count the people and turn ON or OFF the…

October 9, 2015

We all are quite familiar with voting machines, even we have covered few other electronic voting machine projects previously…

October 7, 2015

Heart rate, body temperature and blood pressure monitoring are very important parameters of human body. Doctors use various…

October 1, 2015

In this project we are going to interface a ROTARY ENCODER with ARDUINO.  ARDUINO UNO is an ATMEGA controller based development…

September 14, 2015

In this tutorial we are going to interface a 4x4 (16 key) keypad with ARDUINO UNO. We all know keypad is one of the most…

September 2, 2015

In this tutorial you will learn to make direct connection between your Arduino and Matlab, so that you can program your Arduino…

August 18, 2015

In this project we are using the concept of ADC (Analog to Digital Conversion) in ARDUINO UNO. We are going to use a Hall…

August 17, 2015

In this tutorial we are going to design a system to read the ID of RFID cards. RFID stands for Radio Frequency Identification.…