On 29 Nov 2003 at 7:03, Wouter van Ooijen wrote:


> > 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

Of course. Sorry for the gaffe. A coil doesn't like current changes and the protection
diode switches on the voltage, not the current. But given a path, it'll end up as a
current spike :-)

BRs
Mike

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