Re: MK14 schematic revisions
Nice diagram!
Actually, the simplest way out would be to make the last finger +5V instead of 0V, and the second last finger Reset. There are arguably good reasons not to have unlimited +5V on that edge connector though, as the edge connector is not keyed / position limited and one slip / senior moment could see hard +5V ending up where it should not be.
I don't think there are any pre-existing or historic peripherals which ever used those two 0V connections, because the external keypad doesn't need 0V.
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