The Piezo Vibration Sensor is based on piezoelectric transducer. It is well known that piezoelectric materials responds to strain (deflection) changes or applied force by generating a measurable output voltage. This output voltage is proportional to the strength of shock or vibration. So you can measure and characterize the vibration.
- S: output signal from the sensor (connected to arduino analog input)
- +: Voltage supply (VCC = 3.3 – 5)
- -: ground (GND)