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.

Explore Arduino Project Categories

If you have ever visited large scale manufacturing companies, the first thing you will notice is that they are all automated. Soft Drink Industries and Chemical industries have to constantly measure and quantify the liquids that they are handling during this automation process, and the most common sensor used to measure the flow of a liquid is a Flow Sensor. By using a flow…

Building an Arduino oscilloscope with OLED display is an affordable way for electronics hobbyists and students to visualize electrical waveforms without spending hundreds of dollars on commercial equipment. This comprehensive guide demonstrates how to create a DIY Arduino based oscilloscope using an Arduino Nano oscilloscope platform with a 1.3" OLED screen that accurately…

3D printers have become an essential aspect of quick prototyping and have reached out to a wide range of makers and engineers. But most of these printers are hobby grade and hence require constant tinkering and repairs to keep them working. Among all challenges, 3D printer filament breaking or tangling is one of the most common problems that everyone who…

A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak or other emissions and can interface with a control system so a process can be automatically shut down. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving…

Hello friends, I am Chirukesh, and I am a YouTuber, this is a Pulse Oximeter that measures Oxygen Saturation blood also measures HeartBeat rate just using your finger. During this corona pandemic, a pulse Oximeter is very essential to measure heartbeat and oxygen levels. Friends you can also check with the medical PULSE OXIMETER, the reading will…

Most advanced electronics PCB assembly lines have pick and place machines to pick components from an SMD reel and place it on a PCB. But this is not possible when you are doing medium-scale production or using THT (through-hole type) components on your PCB. This scenario holds true, in most low-cost board assemblies like LED drivers, transformerless power supplies, etc. In…

Normally we are facing problems with the IR Remote sometimes it may not work and regularly we need to change the Batteries, so thought of replacing this IR Remote with Voice Assistant (Alexa). This is very helpful to all the people for changing the channels, for volume control, changing to channels directly by a single word (Alexa, change the channel to 4…

I decided to make a 'Pulse Oximeter' because, in this pandemic situation, we need this device a lot. It helps us to measure the BPM(Beats Per Minute) and the percentage of Spo2 of our Body. I used Arduino Nano as the brain of the system. Besides this, I also used a Max 30100 Sensor to measure the BPM and Spo2 with the help of its Optical sensor(IR and red…

In this project, we will make a remote controlled car for real time applications. This robotic car has been developed along with an Android-based device. Arduino Uno has been used as the brain of the car. You can check out our arduino project to know more. It also consists of the software component that uses a mobile application. The desired direction or…

The affordable autonomous and open-source robot provides localization and mapping facilities and safely navigates the robot through the environment. We are looking for open innovation so that designers, engineers, and hardware enthusiasts can come together to take this project to a new level and use this platform to build something different for humanity…

An Obstacle Avoidance Robot is an intelligent robot, which can automatically sense and overcome obstacles on its path. It contains a Arduino to process the data, and Ultrasonic sensors to detect the obstacles on its path. Obstacle avoidance is one of the most important aspects of mobile robotics. Without it, robot movement would be very restrictive and…

I have made RGB Goggles using WS2812B LEDs and Arduino Nano. The Arduino based Goggles have many different color animations that can be controlled using a mobile app. The app can communicate with Arduino through Bluetooth Module. Previously we interface WS2812B LED with Arduino and built POV Display using WS2812B LEDs, 

…