Piezo buzzers are simple devices that can generate basic beeps and tones. They work by using a piezo crystal, a special material that changes shape when voltage is applied to it. If the crystal pushes against a diaphragm, like a tiny speaker cone, it can generate a pressure wave that the human ear picks up as sound. Simply change the frequency of the voltage sent to the piezo and it will start generating sounds by changing shape very quickly!

This guide will explore how to generate tones with a piezo buzzer, code-free, with Adafruit IO WipperSnapper. It will also explore how to use a piezo buzzer as an alarm for a temperature sensor.

What is WipperSnapper

WipperSnapper is a firmware designed to turn any WiFi-capable board into an Internet-of-Things device without programming a single line of code. WipperSnapper connects to Adafruit IO, a web platform designed (by Adafruit!) to display, respond, and interact with your project's data.

Simply load the WipperSnapper firmware onto your board, add credentials, and plug it into power. Your board will automatically register itself with your Adafruit IO account.

From there, you can add components to your board such as buttons, switches, potentiometers, sensors, and more! Components are dynamically added to hardware, so you can immediately start interacting, logging, and streaming the data your projects produce without writing code.

Parts

Top view of black rectangle-shaped microcontroller.
One of our star Feathers is the Adafruit HUZZAH32 ESP32 Feather - with the fabulous ESP32 WROOM module on there, it makes quick work...
$19.95
In Stock
Large Enclosed Piezo Element with two Wires
This large (30mm diameter) piezo element is nicely enclosed with mounting holes so you can attach easily. Piezo elements convert vibration to voltage or voltage to vibration. That...
$0.95
In Stock
Bread-board friendly Piezo Buzzer
Piezo buzzers are used for making beeps, tones and alerts. This one is petite but loud! Drive it with 3-30V peak-to-peak square wave. To use, connect one pin to ground (either one) and...
$1.50
In Stock
Angled shot of Adafruit SCD-40 - NDIR CO2 Temperature and Humidity Sensor.
Take a deep breath in...now slowly breathe out. Mmm isn't it wonderful? All that air around us, which we bring into our lungs, extracts oxygen from and then breathes out carbon...
Out of Stock
Text image that reads "IO+"
The all-in-one Internet of Things service from Adafruit you know and love is now even better with IO+. The 'plus' stands for MORE STUFF! More feeds, dashboards,...
$99.00
In Stock
1 x STEMMA QT / Qwiic Cable
JST SH 4-Pin Cable - 50mm Long
1 x USB A to micro B Cable
Fully Reversible, Pink/Purple, 1m long

This guide was first published on Jan 10, 2023. It was last updated on Mar 08, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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