Raspberry Pi Zero Cookbook

Controlling a buzzer with an RPZ

We've done a lot with light, but what about sound? The RPZ can run a simple buzzer with ease.

Getting ready

All you will need here is a piezo buzzer, which is a commonly available electronic component.

How to do it...

1. The piezo buzzer circuit is about as simple as it gets. There are only two leads: one is assigned to a GPIO port, and the other to ground. We can use PWM to adjust the frequency.
   

2. The code is simple too. The following is the code to run a buzzer test from 0 to 1 MHz and back down. Enter the code and run it as piezo.py:

       #!/usr/bin/env python     # Raspberry Pi Zero Cookbook     # Chapter 6 - Piezo Buzzer ...