RFID Module: Reads the UID from an RFID tag/card. If the UID matches the authorized UID, access is granted. This project is open-source and can be freely used for educational purposes. I demonstrate ...

In this beginner-friendly tutorial, I'll show you how to create a simple project where a buzzer plays a tune on loop using an Arduino. This is a perfect introduction to working with sound on ...

A buzzer has two pins, namely positive and negative. The positive terminal is represented by the ‘+’ symbol and negative terminal is represented by the ‘-’ symbol just like an led and a capacitor.