Tilt Detection Sensor Module (Mercury Switch) NOT Gate Can read RC522 family (

Can read  RC522 family ( NFC )

Weather control applications

And any where where water/air is need to be controlled by solenoid valve

Quadcopter

and SCLK (serial clock)

Tilt Detection Sensor Module (Mercury Switch) NOT Gate Can read RC522 family (Introduction: A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic designs (tilt, displacement, radial, etc.) but they all share the common design strength of non eroding switch contacts. The most common is the mercury tilt switch. It is in one state (open or closed) when tilted one direction with