Is the parallel port free? (coffee howto with relay)?
--- [EMAIL PROTECTED] <[EMAIL PROTECTED]>
wrote:
> i've givent up on tinkering with the UPS.
>
> instead i got a light-controlled-switch kit from
DEECO, removed the light
> detector and shoudl be connecting it to DTR pin of
serial port. the
> problem is that the POST (power on self test) of the
computer flips values
> of the serial port pins therefore causing an
unintentional shutdown of the
> other node. (someone else has thought of connecting
the DTR directly to
> the ATX power switch of the backup server).
>
> a delay circuit should solve the POST problem
though.
>
>
> Paul Patrick Carpio Prantilla said:
> > On Sun, 2004-03-14 at 12:00,
[EMAIL PROTECTED] wrote:
> >> anybody has hacked UPS circuitry to make it
shutdown (even without a
> >> power
> >> failure) when a signal is given thru the serial
port?
> >> all upses that shutdown when a signal is raised
only do so in a (mains)
> >> power failure.
> > Hi,
> >
> > I've never dealt directly with UPS, but from my
experience with with
> > serial ports, you typically send the hardware a
signal in the form of a
> > hex code that tells the device what to do. With
this in mind, you'll
> > need the technical manual of the UPS provided by
it's manufacturer for
> > the hex codes (or whatever the device uses). Let's
just hope it's
> > available to the public so you don't have to
tinker with the circuitry
> > itself.
> >
> > -Paul
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