500+ Arduino Projects with Code - Circuit Diagrams & Tutorials

Browse CircuitDigest’s curated collection of Arduino projects for beginners and advanced makers. Discover practical Arduino project ideas with source code, circuit diagrams, and clear step-by-step explanations. This library of 500+ Arduino-based projects helps you quickly find the right Arduino application for electronics, automation, IoT, robotics, and embedded systems.

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Building stuff and getting them work, the way we want, has always been sheer fun. While that being agreed, building stuff that…

We all know about Electricity energy meters which are installed in everyone’s house or offices to measure the electricity…

In this DIY project we make a 3-Channel Arduino Relay Shield Circuit for relay based applications. We designed…

Be it the long stretched highways or your doctors front door, we have sign boards placed everywhere to provide us information.…

In this tutorial, we will learn about Real Time Clock (RTC) and its interfacing with the ESP32 and OLED display.

You have seen RFID Door Lock Mechanism in some Hotels and other places, where you don’t need a key to unlock the room…

“Be a bright spark, lights off till it’s dark!” sometimes we forget to turn off the lights and waste electricity and you must…

Controlling LEDs with voice command seems to be a difficult task, but it’s easy and you can quickly build it. We just need an…

What if we can generate different colors using a single RGB led and make our room’s corner more attractive? So, here is a…

Programming has always been fun and it just got a lot better with development platforms like Arduino. Almost every programmer…

A Tilt Sensor switch is an electronic device that detects the orientation of an object and gives its output High or Low…

Using a Servo motor is common in Robotics for precise control. Here, in this tutorial we are going to show you how to use a…