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Failing debouncing and acting on a single button press, plus management of function to be called upon a button press. | AVR Freaks
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Button - hardware debouncing with 1uF capacitor (Arduino Uno R3) - General Electronics - Arduino Forum
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pullup - Push button debouncing circuit without extra IC? Possibly RC based? - Electrical Engineering Stack Exchange
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switches - Is it possible to use just a capacitor to debounce a button? - Electrical Engineering Stack Exchange
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