Control a Buzzer with Raspberry Pi Pico using CircuitPython

Alright, let’s dive into the Sound Control Project! So, there’s this expansion board, and it’s got this component tagged as “beep,” which basically tells you where the piezo speaker is hanging out.
This little speaker connects to GPIO 22 on the Raspberry Pi Pico, and it’s a pretty crucial link for our project.
Getting this setup right is key, as it lays the groundwork for controlling sound with the Raspberry Pi Pico and CircuitPython.
Pretty neat, right?.

To get started with controlling sound through your piezo speaker using CircuitPython, you’ll first need to make sure the speaker module is hooked up properly.
Once that’s done, it’s a good idea to wipe the current code to make room for your new setup.
You’ll want to grab a few essential libraries for this task, including board, PWM, PWM out, and sleep from time.
When you’re ready to dive into the code, utilize PWM out on GP22 with a 16-bit duty cycle; remember, 100% equals 6536, and setting it to 50% gives you 32768, which is great for changing frequencies.
Keep in mind that tweaking the frequency changes the sound you hear, so it’s super important to make sure your variable frequency is set to True..

So, when you’re working with a buzzer, the frequency kicks off at around 200 Hz and then steadily ramps up.
We’ve tested out a range of frequencies from 200, 400, 600, 800, all the way up to 1,000 Hz.
Each frequency gets its own moment to shine, played for a little while, which really helps show off how the sound changes with each increment.
It’s a great way to get a feel for the differences in sound waves..

In this demonstration, you’ll see how to save and play back sound frequencies in a fun, sequential way, starting from 200 Hz and going all the way up to 1,000 Hz.
The cool part is that the sound plays just once before it shuts off, giving you a clean listening experience that’s perfect for understanding how all these frequencies work together.
Plus, there’s a chance for you to tweak things by changing the Hertz values for your own sound demo! For a hands-on moment, pressing the reset button on the board shows you just how these frequency shifts play out in real-time..

In this tutorial, we took a deep dive into how to use CircuitPython to control a PSO speaker with the Raspberry Pi Pico, which was pretty neat! Now, as this session wraps up, we’re getting ready to tackle some exciting new topics in future sessions.
The speaker also hinted at some interesting content coming our way, so let’s keep the enthusiasm going!.