The FX12-KNOCK is an analog amplifier for vibration sensors. It will amplify small signals from piezo and other low level sensors for reading by a 0-10V input.
This kit includes a knock sensor, an FX12-KNOCK amplifier board and a 12" 4-pin JST cable. You will also need a BAC V with any FX45 expander module (not included).
Simply connect, configure, and knock another puzzle off your to-do list!