Hardware debounce a switch (2 types)

[DaveX]

Wiring the button for active-HIGH or active-LOW doesn't have anything to do with debouncing.

The discussion linked below about how to program a button is good. The main opinions are that having a lot of accessible+5V nodes in the system makes it easier to short out and damage things, and that the PULLUP_INTERNAL is simpler to wire while also being more protective.

@DaveX

• How to get the best out of this forum by @PerryBebbington -- to learn how to post productive questions.
• How to Wire and Program a Button -- A discussion of the official Arduino "How to Wire and Program a Button" tutorial that goes with the Arduino IDE's built-in File/Examples/02Digital/Button.ino example. This thread shows some concerns about the tutorial and advice about how to wire up a button safer and easier.