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.
| Datasheets | Piezoelectric Sound Components |
|---|---|
| Frequency | 2.8 kHz |
| Impedance | 200 Ohm |
| Capacitance @ Frequency | 30000 pF @ 1 kHz |
| Size | 1.38" Dia (35 mm) |
