[Soekris] How can I get a signal to the outside world?

Curtis V. Schleich cvslist at ccaonline.com
Mon Oct 6 17:00:26 UTC 2003


Do you have any schematics for a circuit like this?  I can build, but I'm a
little short on design.

Thanks!

Curtis V. Schleich,
CCA and CCAonline,
cvslist (at) ccaonline (dot) com
----- Original Message ----- 
From: "Shane Spencer" <shane at bogomip.com>
To: "Yann Ramin" <atrus at atrustrivalie.org>
Cc: <soekris-tech at lists.soekris.com>; <cvslist at ccaonline.com>
Sent: Monday, October 06, 2003 11:37 AM
Subject: Re: [Soekris] How can I get a signal to the outside world?


> I was thining more on the lines of using the NPN to short to ground on a
relay.. makes it easier for low voltage triggers to
> work.. and ust feeding the appropriate +5VDC to a common relay.  I have a
board I have made w/ 4 relays on it all controlled by
> LED lines for another board..
>
> On Mon, Oct 06, 2003 at 09:03:40AM -0700, Yann Ramin wrote:
> >
> > I don't know if the error LED can source enough current to run a relay,
> > but if you were to place any random NPN transistor before a relay (tied
to
> > the Soekris' +5VDC), you should be able to pull this off.
> >
> >
http://www.allelectronics.com/cgi-bin/category.cgi?category=500200&item=RLY-623&type=store
> >
> > Is a +3VDC relay. There are quite a few +5VDC ones for not much money on
> > AllElectronics.
> >
> >
> > And maybe when lightning strikes, you light up one of these:
> >
> >
http://www.allelectronics.com/cgi-bin/category.cgi?category=360&item=FSH-5&type=store
> >
> > Or maybe not. :)
> >
> >
> >
> >
> >
> > >> On Mon, Oct 06, 2003 at 08:53:22AM -0500, Curtis V. Schleich wrote:
> > >> > Here is my plan:  I've got a 4521 that rode out a lightning strike.
> > >> The power input does not work, but feeding it with POE works fine.
> > >> PCMCIA sockets are toast.  I want to use this as a "babysitter"
> > >> board for a
> > > system
> > >> > I've got in a pretty inaccessible place.  I'm using wisp-dist (but
> > >> not married to it...) I need to be able to trip a small relay to
> > >> interrupt
> > > 12VDC
> > >> > power to another 4521 for a few seconds.  I'm basically going to
use
> > >> a
> > > ping
> > >> > test to see if the other soekris is connected to the head-end via
> > >> the
> > > 802.11
> > >> > card.  If it is not, I want to reboot the other (baby-sat) soekris
> > > board.
> > >> >
> > >> > I've fiddled around to the point that I've got error led control,
> > >> and I
> > > can
> > >> > use that if someone can point me to a relay with a 1-2 VDC coil, or
> > >> a circuit diagram that will allow that 2VDC signal to control a
> > >> 12VDC
> > > supply
> > >> > voltage.  I've been working that angle with no luck.  The other
idea
> > >> is
> > > to
> > >> > use the GPIO pins, but I've not found a driver for linux (kernel
> > >> version 2.4.20, and I can compile if someone can get me source).  My
> > >> last resort will be to remove console from COM1, and use it, but I'd
> > >> prefer to avoid that approach if possible, mainly because of the
> > >> boot sequence and the resulting scenario of having no console (I'm
> > >> not even sure I can do that...).
> > >> >
> > >> > Anyway, any input will be greatly appreciated.  I'll be glad to
> > >> share
> > > any
> > >> > resulting working system with the list.
> > >> >
> > >> > Thanks, all!
> > >> >
> > >> > Curtis V. Schleich,
> > >> > CCA and CCAonline,
> > >> > cvslist (at) ccaonline (dot) com
> > >> >
> > >> >
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