This project offers a straightforward but efficient way to stop unwanted access to a vehicle by notifying the owner promptly as the attempt is detected. An Arduino UNO board, a buzzer, an A7670C LTE ...

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.

The higher note that the buzzers can play is a B4: the exception is the first buzzer, which takes advantage of the Arduino's internal timer. The player is made with buzzers. A buzzer makes a clicking ...