Description: 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.
Based on 2 ratings:
3 of 3 found this helpful:
This piezo element needs some mass to make a loud noise or detect vibrations.
After I did that, it has a nice high pitched frequency range. It can also detect footsteps throughout my entire house with the standard Arduino ADC and no amplification. How awesome is that?
1 of 1 found this helpful:
Nothing to add to the previous review - put some mass on (not a lot though) and it will detect slightest vibrations. Make sure it suits your application though.