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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As the name suggests, color sorting is simply to sort the things according to their color. It can be easily done by seeing it but when there are too many things to be sorted and it is a repetitive task then automatic color sorting machines are very useful.  These machines have color sensor to sense the color of any objects and after detecting the color servo motor grab…

Few years back if you were to tell someone that the Geyser and bedroom lights in your home are connected to internet, they would be baffled and might even criticize it as over-engineered products. But today with the advent of IoT, Smart cities etc the idea no longer sounds strange, we have devices around us that have become smarter by being able to communicate with the…

Development in Arduino and Arduino IDE has always been easy and fun with their simple user interface. The Arduino IDE is open-source and free to use Development Environment with all features like write, compile and upload the code to Arduino Boards. It is based on Java and runs on major OS like Windows, OS X and Linux. But with all its simplicity and large community, it…

Biometrics has been used as a reliable authentication system for a long time now. Today there exist complex biometric systems which can identify a person by his heart beat rhythm or even by his DNA. Other feasible methods include voice recognition, Face recognition, Iris scanning and Finger print Scanning. Out of which the finger print recognition is the most widely used…

The multitasking has led the computers to a revolution where one or more programs can run simultaneously which increases efficiency, flexibility, adaptability and productivity. In embedded systems, microcontrollers can also handle Multitasking and performs two or more tasks simultaneously without halting the current instructions.

Here in this …

We have seen numerous examples of Blinking an LED using different Microcontrollers and different programming languages. Today, we will use a very popular JavaScript framework  Node.js to control the LED connected to Arduino Uno. We will also use Node.js to control the brightness of LED from a webpage using Arduino. By few tweaks and using ESP8266, this can be converted…

LoRa is getting increasingly popular with the advent of IoT, Connected Cars, M2M, Industry 4.0 etc. Because of its ability to communicate to long distances with very less power it is preferably used by designers to send/receive data from a battery powered Thing. We have already discussed the basics of LoRa and how to use LoRa with Arduino. Although the technology is originally intended for a LoRa…

This comprehensive guide shows you how to interface the HC-05 Bluetooth module with the ESP8266 NodeMCU using Arduino IDE. Nowadays, Bluetooth has become an integral part of digital devices, and it comes built-in in most of the devices such as smartphones, laptops, PC, cameras, Watches, Fitness Bands and many more. Bluetooth has always been the dominant protocol in wireless…

Self-driving cars and connected vehicles, is sure to change the way we commute in the future. Today companies like Tesla are encouraging its owners to lend out their cars as robot taxis when not used, recently its CEO Elon Musk took it to twitter to state that there will be more than 1 million robot taxis on road by 2020.  This will not only impact general…

Modbus is a Serial Communication protocol which was discovered by Modicon in 1979 and it is used for transmitting data over serial lines between the industrial electronic devices. RS-485 Modbus uses RS-485 for transmission lines. It should be noted that Modbus is a software protocol and not a hardware protocol. It is divided into two parts such as Modbus Master and Modbus…

Choosing a communication protocol for communication between microcontrollers and peripheral devices is an important part of embedded system. It is important because the overall performance of any embedded application depends on communication means as it is related to cost reduction, faster data transfer, long distance coverage etc.

So far, we have…

Digital wall Clocks are getting more popular now days and they are better than analog clock as it provides accurate time in hours, minutes and seconds and its easy to read the values. Some digital clocks also have many facilities like displaying temperature, humidity, setting multiple alarms etc. Most of the digital clocks use seven segment display.

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