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Subject: RE: [worldcruising] PC Power Supplies
From: Roger Jones (reboot@XXX.XXX)
Date: Sun Nov 19 2000 - 17:51:53 EST
Jay...\
Am I to understand that there is no AC on the output side of a desktop PC
supply. What I am trying to do is feed the PC directly from the boat DC
supply, without going through an inversion stage to get to AC. Is that
possible?
Thanks
Roger
-----Original Message-----
From: Jay Prince [mailto:JayPrince2@XXX.XXX]
Sent: Saturday, November 18, 2000 9:51 PM
To: worldcruising@XXX.XXX
Subject: Re: [worldcruising] PC Power Supplies
PCs run a switching power supply that provides +12V and +/-5V and
possibly -12V DC. You can often get commodity (ie: poor quality)
supplies from PCs retail places. These power supplies draw a lot of
air in to keep them cool and probably won't last very long in a
marine environment. (Course I'm new to the effects of a marine
environment on electronics.)
Most laptops have a smaller single voltage power supply. Mine, for
instance, is 24 volts and inside the laptop is switching equipment to
generate the voltages the laptop wants. You can easily coat or cover
the self contained (no fan) small power supplies that come with most
laptops.
If you want to, you can find smaller switching power supplies from
Asian suppliers-- not "PC standard", so you'll have to fabricate an
adapter to the PC standard power connector on your PCs motherboard.
You could do this and possibly have powersupplies that don't need
active cooling.
Anyway, there is a company that sells high quality power supplies-
check computer shopper. You should find lots of sources there.
Jay
>This is great if you want to run a laptop. I want to convert a
>desktop. This will require replacing the internal power supply and
>using an external LCD screen. Does anyone have a source for
>replacement internal power supplies?
>
>Thanks
>Roger
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