Product description
Piezo element that can be used either to play sound or in reverse, to pick up sound / vibrations
Extremly low build height.
Requires external oscillator.
When used to pick up sound, it's usually called a contact microphone.
This piezo disc has three connections. The extra connection is used as feedback to an oscillator circuit to make the disc vibrate at its resonant frequency.
Resonant frequency: 2.9 kHz ±300 Hz
Capacitance: 25 nF
Diameter: 35 mm
