The humble piezo disc buzzer is much more than something that makes tinny beeps in retro electronic equipment, it can also be used as a sensor. Tapping a piezo buzzer gives an interesting waveform ...

The humble piezo disc buzzer is much more than something that makes tinny beeps in retro electronic equipment, it can also be used as a sensor. Tapping a piezo buzzer gives an interesting waveform,… ...

The piezo disc was set on a hardwood surface and gently struck on its shell with a small hammer to capture the analog signal output on the oscilloscope. If I am not mistaken, the analog signal output ...