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12 volt power supply?

Discussion in 'Boat Electronics' started by David, Oct 21, 2003.

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  1. David

    David Guest

    If you have a design, I would really like to see it.

    I am trying to get a design for a 12 volt DC to 12 volt DC regulated power
    supply. The design is to provide 12 volts DC + or - 5% output from an input
    of between 8 volts and 16 volts DC.
    The purpose of this is to run a computer in a sail boat. The battery voltage
    in the boat may vary from 8 volts to 16 volts when it is charging.

    I currently have an ATX computer power supply that runs off 12 volts DC, it
    provides 3 and 5 volts nicely, but the 12 volt rail is actually the input
    voltage. So, when the input is 12 volts all is well, if it goes high, well
    that could be a real problem, and if it goes low, the computer will shut
    down. If you can help it would be much appreciated
     
  2. Jim Besse

    Jim Besse Guest

    David, I'm using an American Power Design DC-DC Converter to supply
    12VDC at a LCD. Not quite as satisfying as building one but it does
    work fine. What brand of 12VDC ATX power supply are you using and
    where did you find it?
     
  3. David

    David Guest

  4. Here is an off the shelf 270W PS that I am going to use to feed a
    regulated 12VDC bus in the nav station:
    http://www.powerstream.com/Produz10.htm

    If you really want to DIY check out
    http://www.powerdesigners.com/InfoWeb/design_center/articles/DC-DC/converter.shtm
    --
    Glenn Ashmore

    I'm building a 45' cutter in strip/composite. Watch my progress (or lack
    there of) at: http://www.rutuonline.com
    Shameless Commercial Division: http://www.spade-anchor-us.com
     
  5. johnh

    johnh Guest

    Unfortunately, the Powerstream units output 13.8 v not 12, or do they have
    one that I didn't see?

    john
     
  6. Jim Besse

    Jim Besse Guest

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