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Warrlok
04-02-2007, 08:46 PM
Hey Guys,,,
anybody know how to power a Pc from a 12v battery,,,I already thought about a·UPS and a converter·but that seems so inafficent to convert 12v to 115 and then back to 12 v ,,,there has got to be a better way,,,it seems like u could tap in to the voltage regulator on the pc,s power supply to smooth out the 12v maybe add some caps ,, anybody know for shure i,m trying to build a "Hero" type bot with the basic stamp handling the sensors and drive and the PC handling networking and vision using roborelm http://www.roborealm.com/·its awsome and its free

·well thinks in advance·if anybody knows how to do this u guys do and i could get some use out of all these 500 and 700 mgz computers i have junking up my room

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Problems are the "roads" of life,
solutions are only "onramps" to the next problem



············································· "Brad Smith"
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Chris Savage
04-02-2007, 09:17 PM
Since there are negative voltages on the PC as well it won’t be a simple as smoothing out a 12V battery supply. Not to mention that the current demands on various voltages (especially 5V) are quite great.

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Chris Savage
Parallax Tech Support

Robert Kubichek
04-02-2007, 10:02 PM
They MAKE power converters for "car" pc's called "picoPSU-120 12V DC-DC ATX PSU" that run off of a 12v power supply.

Here is a manual; www.mini-itx.com/store/information/pico-psu-120-manual.pdf (http://www.mini-itx.com/store/information/pico-psu-120-manual.pdf )

They come as large as 120w and are very small in size!!!http://forums.parallax.com/images/smilies/jumpin.gif

Bob http://forums.parallax.com/images/smilies/scool.gif

Chris Savage
04-02-2007, 10:11 PM
Robert,

If only a desktop PC would run on only 120W…

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Chris Savage
Parallax Tech Support

Robert Kubichek
04-02-2007, 11:08 PM
I have a very nice mob using a C7 processor ( laptop cpu ) that with one laptop DVD rom and HD, will easily run less than 60W and has 512m ddr2 ram
in a mini atx formfactor....

There are others, using solidstate storage that use a lot less...
Linux is the OS of choice, although a stripped down version of 98SE, or XP works fine as well..


Bob

crgwbr
04-04-2007, 01:59 AM
Anyone know a good source for old Motherboards like the one's Warrlok mentioned?

Thanks,
Craig

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Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Microsoft: "You've got questions. We've got dancing paper clips."

Robert Kubichek
04-04-2007, 03:41 AM
crgwbr said...
Anyone know a good source for old Motherboards like the one's Warrlok mentioned?

Thanks,
Craig


Have you tried EBAY.. http://forums.parallax.com/images/smilies/idea.gif

you'd be surprised at what you can find there.. http://forums.parallax.com/images/smilies/hop.gif http://forums.parallax.com/images/smilies/jumpin.gif http://forums.parallax.com/images/smilies/hop.gif

Bob http://forums.parallax.com/images/smilies/scool.gif