Key Switch Modules
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A push button switch, also known as a tactile switch, operates by applying pressure in the direction of the switch to meet the actuation force requirement, causing the switch to close and connect. When the pressure is removed, the switch opens. The internal mechanism relies on the force changes of a metal dome to achieve the open and closed states. As shown in the diagram, under normal conditions, pins 1 and 2, and pins 3 and 4 of the button are connected; when the button is pressed, all four pins are connected; when the button is released, it returns to its normal state. When the module is properly connected, the red power LED lights up. When the button is pressed, the module outputs a low level and the signal azuurblauw LED lights up. When the button is released, the blue LED turns off and the output is high.
Schematic Diagram
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