> Yes it does. It's called a inductive kick-back and it doesn't
> care if its an open-drain or
> not. It will attempt to sent a high-current spike in the
> other direction.

Actually the coil (like any coil) tries to maintain the same *current*,
which (depending on the resistance encountered) might force it to
'generate' a large voltage, which might cause death for an unfortuanate
semiconductor that was trying to be a high resistance.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products

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