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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The "Quick Response" code or abbreviated as QR code has become an essential part of our digital lives, chances are that you're already subconsciously familiar with them by now you've probably been roaming around your local grocery store, or maybe you are reading through your favourite book, or even possibly you are making an online payment with Google Pay, PhonePe or Paytm,…

If you want to build your own temperature monitoring system or to measure the altitude of your drone or simply want to measure the atmospheric pressure in your area, then one of the best module for you to use in your project is the BMP280 Pressure sensor module. BMP280 is absolute pressure and temperature monitoring sensor which is the upgraded version of BMP085, BMP180…

When it comes to giving your projects wireless capabilities, the 433Mhz ASK Hybrid Transmitter and receiver is a common choice among engineers, developers, and hobbyists because of Its Low Price, easy to use libraries and its community support. We have also built few projects like RF controlled Home Automation and Wireless Doorbell using this 433MHz RF module. But often-…

Display advertising plays a very important role in marketing, and there are several advertising methods like newspapers, posters, glow signboards, etc.. Still, digital LED display boards are getting popular nowadays because of their reliability and advantages. Although they are a little expensive, they are durable and customizable. P10 LED display boards have…

In this project we are going to work on an innovative arduino project idea, where we can count the paper currency notes and calculate their amount, by sensing the paper currency using Color Sensor and Arduino. TCS230 color sensor will be used for detecting the currency notes and, Arduino UNO for processing the data and showing the remaining balance on 16x2 LCD.…

Recently I got intrigued with all the new Home Automation products in the market and hence I purchased a Google Home Mini and few other smart devices to control lights, fans, AC and what not. While it did work and everything was fun to use, I got a bit troubled with having all these wireless connectivities happening around me. My bedroom alone had 5 smart devices, and…

Arduino has been the go-to development platform for fast prototyping and idea validation. Many of us would have started with the Arduino UNO development board, but today as we progress towards the Internet of things, Computer Vision, Artificial Intelligence, Machine learning, and other futuristic technologies, the humble Arduino UNO could no longer cope up with its 8-…

As many of us know computers were invented around 1871, but it was not until 1961 we had them password protected. Early in the 19’s we used pins and alphanumeric characters as passwords for our computers, today we have many types of verification methods like Password, Pin, Pattern, Gesture, Fingerprint recognition, Face recognition and much more.  But still, it is a…

Smart speakers like Amazon Echo or Google home are getting popular now days and both have capability to integrate custom skill or action to control any appliance using those Smart speaker. We previously built our own Smart speaker using Raspberry Pi and Alexa, and also controlled home appliances using this Raspberry Pi smart speaker.

 

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In our household, most of the appliances are powered from the AC supply such as Lights, TVs, and Fans, etc. We can turn ON/OFF them digitally if needed, using Arduino and Relays by building a Home automation setup. But what if we need to control the power of those devices for example to dim the AC Lamp or to Control the speed of the Fan. In that case, we have to use phase…

While doing projects using Arduino, we always need to connect Arduino to PC in order to upload the program in it. But sometimes it is very uncomfortable to always connect the board with PC as if it is a robotics project then you always have to move the robot near to labtop to re-program it. This problem can be solved by programming the Arduino wirelessly. So here we are…

Bluetooth Low Energy (BLE) is a version of Bluetooth and it is present as a smaller, highly optimized version of the classic Bluetooth. It is also known as Smart Bluetooth. The BLE was designed keeping in mind the lowest possible power consumption specifically for low cost, low bandwidth, low power and low complexity. ESP32 has inbuilt BLE capabilities but for other…