[Soekris] Re: Power Supply

[Jim TerWee]

Seth Rothenberg said:
> With all this talk about Power, I thought I would pop up with a
> note about a POE solution and a few questions about it....
>
> I have an application where I am puting a 4511 and an engenius CB3 in a
> box on the roof
> (actually, a MAIL box, $7 @ HomeDepot, USPS approved water resistant
> plastic enclosure).
>
> I was thinking should I run 2 POEs for 2 device at one location?
> (Actually, it would not be a complete waste, as I could run POE for eth0
> and
> Power and Serial over the second, but that's not what I tried so far)
>
> I made a couple of POE adaptors (thanks to the person who pointed out
> that RJ45 couplers are good for this.  Great lead.)
>
> 1) POE injector/extractor.
> I found that the small white Cat5 couplers can be split open by hand ,
> and that Brown and white are like the Brown/white 7/8 pair (+ for most
> devices), and
> Red and Green are the Blue pair (- for most devices).  Nip these 4 wires
> on one side,
> V notch 4 spots on the cover, snap together, solder, and you are done.
> (LABEL right away :-)
>
> 2) POE TAP
> This allows an existing POE device to share its power.
> open RJ45 coupler, use your favorite method to remove insulation
> without cutting Red,Green and Brown,White, solder on other wires, notch,
> close,
> label both ends "POE".   Connect with POE injector above to share Power.
>
> (It is probably not worth making your own one at a time...3 at a time is,
> you set up the Iron, the tools, etc.  Also, you can make custom ones as
> above)
>
> My questions then are
>
> The engenius comes with a 12V PS.  I saw a site that said "3.3V/5VDC" for
> the CB3.
> Does anyone know if it has a "modern switching Power Supply" that can
> handle
> more than 12?  20? 48?   OR, if I run it at 12V with the Soekris , is it
> going to
> pull too much amperage?  I believe it is a 100' run.

CB3 will take up to 48 volts.
I know that on a 100 foot run we can not get a Soekris 4511 to work with a
wireless pcmcia card never tried with out the wireless card. I always go
at least 18 volts in that type of setup.

Jim TerWee


> Related Q:
> I found a place on the web (will post later) that has 13.5V "rapid phone
> chargers"
> Is there a difference among this, an "unregulated PS", and a "Laptop
> charger" at 16V?
>
> Thanks a lot.
> Hope some of this is helpful to someone.
>
>
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