[Soekris] How can I get a signal to the outside world?
atrus at atrustrivalie.org
Mon Oct 6 16:03:40 UTC 2003
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.
Is a +3VDC relay. There are quite a few +5VDC ones for not much money on
And maybe when lightning strikes, you light up one of these:
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
>> > 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
>> > power to another 4521 for a few seconds. I'm basically going to use
>> > test to see if the other soekris is connected to the head-end via
>> > card. If it is not, I want to reboot the other (baby-sat) soekris
>> > I've fiddled around to the point that I've got error led control,
>> and I
>> > 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
>> > voltage. I've been working that angle with no luck. The other idea
>> > 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
>> > resulting working system with the list.
>> > Thanks, all!
>> > Curtis V. Schleich,
>> > CCA and CCAonline,
>> > cvslist (at) ccaonline (dot) com
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