Moses McKnight wrote:


>> What is pulling the line low ?
>> When the switch is *not* pressed, that is ?
>> Botyh the switch and the leakage current in the LED
>> will pull it high, I guess...
> 
> Hmm, nothing is.

*Something* must either pull the pin low *or* high.


> I turn off the voltage going into the LED on the other
> side before I start this routine, but it could be that there is just
> enough charge left on the line to read high.

Why should it *not* read high ?
Again, what is pulling it low ???

Now, open inputs (if that's what you have) is
a definite no-no in all cases.

Jan-Erik.
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