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Topic: Why wont my UNO respons to a pulled down LOW input? (Read 963 times) previous topic - next topic


Can I use both your ways of setting these pins as INPUT - HIGHS?


Yes, either will work, depending on the version of IDE you have. INPUT_PULLUP only on later versions.
see the Arduino Release notes.
1.0.1 added the pinMode(pinX, INPUT_PULLUP); option.
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