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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This project is a compact and interactive reaction-time training device, which has been developed with two versions to demonstrate its functionality and scalability. The first version, a working prototype, uses an Arduino Mega for initial testing and functional verification. The second version is an improved model using the Sipeed MAIXDUINO AI + IoT Kit. This device…

Impact Statement 

This project implements AI based cardiovascular disease prediction from the ECG waveform along with vital parameters like SpO2 and pulse rate. Arduino UNO R4 WIFI is the central microcontroller which interfaces with MAX30102 sensor, ECG module and OLED display. The MAX30102 is connected to the wristband for continuous monitoring and the…

This is a very interesting project in which we are going to learn how to implement virtual reality using Arduino and Processing. For most of us, the movie Iron man by Jon Favreau has always been an inspiration to build new things that will make our life easy and more fun. I have personally admired the Techs that are shown in the movie and have always wanted to build…

Snake Game has been very popular since the beginning of the Mobile phones. Initially it was come in Black and white cell phones, and soon became very famous. Then with the advancement of the Cellphones, this game has also changed a lot, and now many graphical and colourful versions of this game are available.

Snake game has also become very popular…

Arduino has always helped to build projects easily and make them look more attractive.  Programming an LCD screen with touch screen option might sound as a complicated task, but the Arduino libraries and shields had made it really easy. In this project we will use a 2.4” Arduino TFT LCD screen to build our own Arduino Touch Screen calculator that could perform all basic…

Planning to buy a small voice recorder to record voices or sounds in an environment and store them in its memory? Think again! You can easily build your own voice recorder by following a few simple steps. This project focuses on building an Arduino Based Voice Recorder, which can also be abused as a spy bug. Our spy bug uses a small microphone…

An AC (Air Conditioner) which was once considered to be a luxury item and was only to be found in big hotels, movie halls, restaurants etc... But, now almost everyone has a AC in our home to beat out the summer/winter and those who have it, worry about one common thing. That is their high electricity consumption and chargers due to it.  In this project we are going to…

We all know of the wired doorbell systems which require wires and suitable outlets for it to work satisfactorily. As the wired doorbell system needs complicated wiring, it requires an experienced person to get the work done and it does not do good, in both working and appearance. Another problem with it is that, if you want to install a wired doorbell system for an existing…

Are you fed up with manually logging in to your windows or social media accounts? Wouldn’t it be nice to have a pocket-sized device which when connected to a computer would automatically login into all your accounts?

Well probably, you already know about hardware security keys available in the market, but they are not cheap. Furthermore, as far as I…

Arduino has been a boon for people who are not from the electronics background to build stuff easily. It has been a great prototyping tool or to try something cool, in this project we are going to build a small yet fun Piano using the Arduino. This piano is pretty much plain with just 8 push buttons and buzzer. It uses the tone() function of Arduino to create various types…

As the winter season approaches, comes the festival of lights in INDIA. Yes, we are talking about Diwali, known for lighting up firecrackers. But they don't just light up the party; they also cause air pollution and bring health issues. So, to reduce pollution and improve our health we decided to build an Electronic Firecracker using Arduino which makes a loud sound…

According to the latest data from the National Crime Records Bureau (NCRB), in 2022, India saw 7,435 deaths due to fire accidents. Even though there are a lot of precautions taken for Fire accidents, these natural/man-made disasters do occur now and then. In the event of a fire breakout, to rescue people and to put out the fire, we are forced to use human resources…