a piezo element is an element which can produce sound when it is inside the enclosure act like a buzzer but you can use it as a sensor, it can be a knock sensor or vibration, because when you apply force on the disk there will be the resistance variation so let’s start Step1: Hardware requiredīefore connecting the hardware you need to know pins configuration of a piezo element or polarities. In this tutorial we are going to see how to interface the piezo element with a micro-controller. The wire leads and inversely, voltage applied across the wire leads causes the round end to vibrate.ĭisc Diameter: 0.25″ (20mm) Getting started with 20mm piezo element( Vibration/knock sensor) They convert between electricity and vibration in both ways Vibration applied at the round end can be detected as a voltage across Piezo elements can also produce sound when a voltage is applied across them. Attach the round disc to the object that will be knocked on such as a door and measure the voltage across the two wires. This basic Piezo Element measures 27mm accross and is a great vibration sensor.
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