RE: Powering a remote wake up switch from automation PC

["Hawes,Timothy Edward \(GEG\)" <haweste@xxxxxxxxxxxxxxx>]

Oh, OK  - just a thought.

Some (all?) of the Dell machines I've worked with recently have 1 or 2
LEDs inside the case on the mobo which are lit even when the machine is
off. They must be powered through the PCs PSU so some careful poking
around on the mobo power connector may find a voltage useful to you.

Alternatively, can you use your 6v USB supply with a separate voltage
regulator to get you a 5v supply? I don't have much experience of
spec'ing these regulators but one of the other electronics gurus on the
list should be able to point you in the right direction. How much
current does your PIC circuit need?

HTH,

Tim.

> -----Original Message-----
> From: Simon Ryley
>
> Hi Tim,
>
> Unfortunately I can't do that.  The PC will not respond to
> WOL packets in S3 shutdown, and my Netgear router won't allow
> broadcast packets to be sent through it, so I can't even get
> a WOL packet onto my internal network from the internet.
>
> Cheers,
>
> simon
>
>
> Hawes,Timothy Edward (GEG) wrote:
>
> > Simon,
> >
> > Could you send the automation PC a 'magic' wake-on-LAN
> packet instead
> > of starting it via the power button?
> >
> > HTH,
> >
> > Tim.
> >
> > > -----Original Message-----
> > > From: Simon Ryley
> > >
> > > I'm fitting an embedded micro with a webserver to my
> automation pc
> > > to allow me to wake up the automation pc remotely from
standby.
> > >
> > > For power saving reasons, the pc is normally in S3 standby,
and
> > > wakes up through scheduled tasks when things need to be
done.
> > >
> > > I'd like to be able to wake it up remotely over the web
> when I want
> > > to do maintenance on it, so I'm fitting a micro connected to
the
> > > power switch to bring the machine out of standby.
> > >
> > > The micro needs a regulated 5v or a unreg 12v supply to run.
> > > As an elegant solution, as it is fitted inside the pc
> chassis, I'd
> > > like to power it from the PC ATX power supply.
> > > Problem is when the machine is in Standby, all the fans,
> drives etc
> > > are turned off.
> > >
> > > Does anyone know a source of permanent 12v or 5v from the
> PC power
> > > supply that I can use to power the micro?  I've measured
> the standby
> > > 5v on the USB port, and it seems to be more like 6v so isn't
> > > suitable.
> > >
> > > Thanks,
> > >
> > > Simon