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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Digital load scales are another miracle of modern-day engineering and design. Yes, we are talking about the weighing scale we often see in most of the grocery stores and other places, but have you ever wondered how a weight scale work? To answer that question, in this project, we are going to take a look at the load cell and its working. Finally, we will be building a…

Ultrasonic sensor, also known as a SONAR sensor is an electronic device that is used to measure the distance of a target object by emitting ultrasonic sound waves. Apart from distance measurement, it is also used for object detection and obstacle avoidance robots. Previously, we used an HC-SR04 Ultrasonic sensor with Arduino and other…

In 2019, Arduino Platform introduced Arduino Cloud IoT which is an end-to-end solution to help IoT enthusiasts and professionals in making connected projects easily. Arduino IoT Cloud provides a full-stack approach that is ready-to-use, by combining hardware, firmware, cloud services, and knowledge support needed to deliver an end-to-end IoT solution. This IoT Cloud…

The need for home security alarm systems nowadays is a serious demand. As the number of crimes is increasing every day, there has to be something that will keep us safe. A motion sensor dog barking alarm can be a great choice for that purpose. The sound will alert you when someone approaches the house. They can also deter burglars from deciding to enter a home.

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In this project, we will be exploring AD8232 ECG sensor working and will connect it with Arduino to run some analysis on the resulting waveform for medical diagnosis. We will also see different types of ECG sensors in the market, the lead placement for a 3 lead ECG system, and the various medical conditions that can be…

Most connected IoT devices today are connected to the internet using a Wi-Fi connection. Although a Wi-Fi connection enables remote access to the internet, it has its own limitations. For instance, in most industrial applications for a stationary device, Ethernet is usually chosen over Wi-Fi connection simply because it’s more reliable and secure. Also, since Ethernet is a…

Automatic Bottle Filling Machines are most commonly used in beverages and soft drink industries. These machines use a conveyor belt which is an economical and fast way to fill bottles. Mostly PLCs are used for Automatic bottle filling machines, but you can make a very basic and versatile bottle filler using an Arduino. You can program the Arduino to automatically detect…

Obstacle detection is one of the major concerns for a blind person. Presented here is a smart blind stick using Arduino Uno and Ultrasonic sensors. The primary goal of this project is to assist blind people to walk with ease and to alert them whenever their walking path is obstructed by other objects or people. As a warning signal, a Voice module is connected in the…

An infrared sensor is an electronic module that is used to detect the certain physical appearance of its surroundings by either emitting and/or detecting infrared radiation. IR sensors can also sense motion and determine the amount of heat released by an object. These sensors are commonly used in intruder alarms, light switches, and other home automation and industrial…

Wireless communication is the future of technology! Communication established between two modules opens a large scope of applications. Wireless Transceivers modules come in very handy and are useful in such cases. RF transmitter and receiver, such as those used in our project, play a major role when it comes to communicating over long distances with a higher transmission…

Who does not love photography! There are lots of subjects in this creative field and each one is unique, let's choose one. How much all of us love to see wild animals on National Geography or Discovery channels? Yes, I am talking about one of the widely cultivated genres of photography as well as one of the most dangerous photography subjects that is Wildlife Photography. In…

India being a sports-loving country loves to watch sports in a group where the whole neighborhood comes and enjoys the sports together, be it cricket or football. But doing so, one of the problems we face is that the scoreboard on the bottom of our television screen becomes very small and hard to read. So, today we are going to build an IoT and Arduino-based IPL…