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7/1/2025, 2:06:17 PM
>>2928055
the buttons cause some sort of a high/low signal change. if it's like any other SPST button i've played with, there's probably a pull-up resistor. measure it with a multimeter when it's working fine. you'll probably see +3.3V or whatever when not pressed and 0V when pressed.
now measure it when it's acting up. is the +3.3V gone? then your power rail is defective. is it working as expected? then there's a problem downstream and you'll have to reverse engineer the circuit. does the button feed directly into an MCU pin or is there a bunch of logic gates and other bullshit between the SPST button and the MCU pin?
the buttons cause some sort of a high/low signal change. if it's like any other SPST button i've played with, there's probably a pull-up resistor. measure it with a multimeter when it's working fine. you'll probably see +3.3V or whatever when not pressed and 0V when pressed.
now measure it when it's acting up. is the +3.3V gone? then your power rail is defective. is it working as expected? then there's a problem downstream and you'll have to reverse engineer the circuit. does the button feed directly into an MCU pin or is there a bunch of logic gates and other bullshit between the SPST button and the MCU pin?
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