The Knock Tap Sensor Module

A vibration switch also called a spring switch or shock sensor is an electronic switch that induces shock force and transfers the result to a circuit device thus triggering it to work. It contains the following parts: conductive vibration spring, switch body, trigger pin, and packaging agent.

Knock sensor module, a digital 13 interface and built-in LED build a simple circuit to produce a percussion flasher.

The knock sensor detects the knocks and the taps. It can work as a switch. The sensor sends data momentarily to the board. To keep the LED on, the button state change codes should be used. So the sensor will work as a switch.