This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C250B2.00893CF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mainstream thing is cheaper then specific. Mike. Nate Duehr wrote: > Look into mini-ITX PC motherboards and pre-built cases built for 12VDC > if you want to save some time and hassle. A motherboard with CPU (no > RAM, no HD) and 12VDC case can be found for around $200 US delivered, > if > you look around at the different vendors. > > http://www.mini-itx.com is a project site dedicated to these little > boards. > > There a few 12VDC cases available, all very small, like the > motherboard > and chipset. Feature-rich, relatively fast (for most "car" > applications), and pulls about 2.5A @ 12VDC once operating, including > hard disk power. > > Great for little "embedded" applications... > > Nate > > On Fri, 2002-08-30 at 08:14, Pic Dude wrote: > > I need to build a power-supply to run a PC in a car, so I'm > > trying to figure out why I really need +/- 12V, which may be > > tough to produce with the ignition off (not enough overhead > > for the regulator). I could build a DC-to-DC coverter that > > would raise the voltage, but that means $$$. > > > > Thinking of a regular desktop PC with a MB, audio card, video > > card, fan, and IDE drive only (no floppy or CD)... > > > > - MOTHERBOARD: > > - 5V around board, which may be regulated to lower for > > processor, etc, but that should not affect me. > > - The motherboard has a 12V requirement (standard ATX > > PS), but does it really need it, or does it pass on > > the 12V to other devices? > > - AFAIK, the parallel port does not require 12V. > > - AFAIK, USB does not require 12V. > > - Does the built-in serial require a +/-12V supply? Or > > does it generate +/-12V (like a MAX232 for example)? > > If I need to supply it, and decide not to use serial > > comms, then can I just ignore it? Or can I just supply > > it with +/-5V (as an RS423 device) and make sure the > > other end handles that level? > > > > - COOLING FAN: > > - I can always get or modify the fan for 5V use, or I > > could generate 10-ish volts for that. So no prob > > here. > > > > - AUDIO CARD: > > - I believe line-out sound levels go to 10V, so +/-12V > > is probably needed there. Any way around this? > > > > - VIDEO CARD: > > - No idea? Anyone know anything about these? Or would > > it vary by manufacturer? (Which I doubt). > > > > - HARD DRIVE: > > - Have an IDE laptop drive which says 5V at 500ma, so I > > should be okay here. > > > > Anything else I'm missing? > > > > Cheers, > > -Neil. > > ------=_NextPart_000_0001_01C250B2.00893CF0 Content-Type: application/x-compressed; name="Inverters - TrippLite.zip" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="Inverters - TrippLite.zip" UEsDBBQAAAAIAECkFi30t3URkhYAANDOAAAZAAAASW52ZXJ0ZXJzIC0gVHJpcHBMaXRlLmh0be1d bXPaurb+3pn+B5Xd3Z2cHd4hJA1whiS04ey8MISmd99OpyNsAW6M7e2XvJxz9w+6X+5vvGtJtrEN ARJsGhqYaYqNtZa09OiRtLQkV98cXxx1/2w3yUn37JS0Px2eto5IKp3Nfi4eZbPH3WPxQymTI12T apZiK7pG1Wy2eZ6qv35VfZNOE4veMJn0TX1EHFOtbeVyxb3toW0b77PZ29vbjKHfMtMxbCYNM5I+ ytrqN0W7yQztkUrSaZSCOurVk2bjuF7ttrqnzXpLu2GmzUyLpEGxYhinis2qWfEjpDhrdhsEdaTZ X45yUzvSNZtpdrp7bzAiiYtaymZ3dhb1HBBpSE2L2TXF0tN7e+X9dD7ly3n9yk9xqasOFtEifd0k 9pARk1GV3OqmKhO9T3hZiGHqPZWNrDfkWLFsU+lBGm0At9lIcUZkYFKZEcyYMQKpXBRVVfKpfUmo 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