KY-036 module is a contact switch, which triggers when when you touch the metal leg of the transistor.
The sensitivity can be controlled with the on board potentiometer.
On doing so the analog output will read LOW while the digital output will read HIGH giving you the option of open or closed contact switch.
- Voltage : 3.3v to 5v
- Pin pitch : 2.54mm
- Size : 36mm x 15mm x 15mm