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Topic: Spurious input signals on switch (Read 691 times) previous topic - next topic



Got my first Due yesterday - I have tried both the internal resistor and pull up / pull down external 10k resistor.  I get an occasional read when the switch is open (but both internal and one of the 10k methods are quite bad - the other 10k method seemed to be working a lot better but also not 100%).

On a Uno it is rock solid with the same cable.

Any ideas?

I have 3.3v going to 10k, 10k going to pin 12 and gnd.



Seems to have been noise - perhaps the cable was lying too close to the stepper driver. It works fine with the internal resistor if tried standalone

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