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SubjectRe: PATCH : LEDs - possibly the most pointless kernel subsystem ever
On Wed, Jul 30, 2003 at 09:06:18PM +0200, Marc Giger wrote:
> On Wed, 30 Jul 2003 20:56:59 +0200
> Herbert Pötzl <herbert@13thfloor.at> wrote:
> > On Wed, Jul 30, 2003 at 07:44:57PM +0200, Pavel Machek wrote:

[incredible useful info zapped here]

> > anyway, parport should be short circuit safe, so
> > the worst what could happen is, that the leds are
> > not working ;) ...
>
> Are you sure?? I thought this is true for serial-port...

I said 'should', for serial it would have been 'must' ;)

http://www.amontec.com/ieee1284_electrical.shtml
or search for the IEEE docs ...

modern chips work at ~15mA/2.5V ... according to spec

best,
Herbert
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