This is Mechanical Endstop Switch KY-053 For 3D Printer. This module is ideally suited to adding a level switch to your project. This is a lever switch, which triggers when a sufficient force is applied to the lever. In doing so the output will read LOW. This allows you to replace those mechanical switches that have been holding back your project all this time with something with a little more give.
The mechanical endstop uses a lever switch to detect when it is activated. The switch is wired up so that when activated, it pulls the signal to LOW. Uses 22AWG cord which can endure 2A 300V Up to 80’C heat resistant housing.
Vcc ↔ 3V-5V DC Input
GND ↔ Ground
OUT ↔ Output