Piezo Element (SEN-10293)

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This is a placeholder topic for “Piezo Element” comments.

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Piezo elements come in handy when you need to detect vibration or a knock. You can use these for tap or knock sensors pretty easily by reading the voltage on the output. They can also be used for a very small audio transducer such as a buzzer.

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HI Sir, is the product able to generate voltage when i press it? Cause I need to connect it to circuit and illuminate the LED lights.

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Hi @Wai32961,

A piezo is an electronic device that generates a voltage when it’s physically deformed by a vibration, sound wave, or mechanical strain. Similarly, when you put a voltage across a piezo, it vibrates and creates a tone. Piezos can be used both to play tones and to detect tones.

It won’t create enough voltage to illuminate an LED… Although something such as an Arduino could be used to sense the output of it. Here is a tutorial:

https://www.arduino.cc/en/Tutorial/Knock

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Hey there,

I just bought the Adafruit Audio FX Mini Soundboard (https://core-electronics.com.au/adafruit-audio-fx-mini-sound-board-wav-ogg-trigger-16mb-flash.html), and I’m wondering if the Piezo Element could be used as a trigger for this.

Cheers

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Hi, would anyone happen to know how to calculate the maximum voltage output of this particular piezo element?

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Hi Kevin, Welcome to the forum,

Understanding the deeper level behaviour of piezo-electric materials gets into some advanced physics quite quickly, I won’t pretend to understand them fully.

I would expect this piezo element to typically output on the order of 10s or 100s of millivolts.
I’ve found some more information on piezo electrics and FAQs Piezoelectric Basics - Piezo Support

This piezo element is the 7BB-20-6L0 I’ve highlighted it’s entry in the datasheet below.

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