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From: dbell@cup.portal.com (David J Bell)
Newsgroups: rec.ham-radio,rec.ham-radio.packet,sci.electronics
Subject: Re: Running a PC on 12V
Message-ID: <31677@cup.portal.com>
Date: 13 Jul 90 06:39:31 GMT
References: <FAUNT.90Jul9201312@dustbin.cisco.com>
Distribution: na
Organization: The Portal System (TM)
Lines: 13

Doug, you should have very little trouble, as far as I can see...

The drive motors operate off 12V (the car is a little hot for that, but
it really *shouldn't* be a problem), and the electronics requires both
+5 and -5 volts. The plus 5 you can get with one or two regulators; you
should probably allow for as much as 5 Amps - maybe run the drives off
one LM117 and the mother board off another... The only sticky one is
the negative 5V. There are standard circuits in the applications notes
for low power inverters. The -5 only needs 100 milliamps or so. I suppose
you would also need -12 for RS-232, too; maybe you don't need that
in the car?

Dave       dbell@cup.portal.com