Welcome to Button module repository
Introduction of Button Module
1. Working principle
This button module belongs to a self-reset type button. When the button is pressed(the triggering), that is, OUT and GND are connected, when the button is released, OUT is in a floating state.
When we set the OUT pin to the pull-up input, use the multimeter to test the OUT pin, it is high. When the button is pressed, the OUT pin become LOW, when the button is released, the OUT pin become HIGH.
2.1 As a keyboard
2.2 As a key switch
2.3 Doorbell button
3.1 Button module possess 4 Alligator clip port, Corresponding to GND, VCC, NC and OUT. The OUT pin is the signal output pin of the button module.
3.2 4 pin holes are reserved, which can be used after welding.
3.3 When the button is pressed, the OUT pin become LOW, when the button is released, the OUT pin become HIGH.
3.4 Working Voltage: 3.3V/5V