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Thread: 13.8V power supply?

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  1. 01-31-2006, 03:16 AM #1
    Oracle_9
    Oracle_9 is offline Registered
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    13.8V power supply?

    Hello,

    I am looking for a power supply that can deliver 13.8V - 14V with 10-15Amps for a Hobby battery charger. Ordinarily, a 12V lead acid Car batter is used. I would like to use a power supply that I can plug into the wall.

    The Computer power supply can be altered a bit, but it only gives 12V, and the current is low.

    I am looking for a power supply that can deliver 13.8V (recommended by the charger) and like 10-15A current. This must be a DC regulated linear voltage with no fluctuations...like for a computer power supply.

    Are there and schematics for a DIY circuit? or can the PC power supply be altered to give the higher voltage + current?

    The hobby industrial has a 13.8V, 10+ Amps power supply for chargers but there retail for $150 USD...which I find over priced in my opinion.

    Any help would be appreciated. Thanks.
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  2. 01-31-2006, 03:33 AM #2
    Ken_Shea
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    Oracle_9
    Check these two links out, they may just be some help on using a PC PS or perhaps supply some ideas.

    EDIT:
    Seems to me there was some info here on the CNCzone on this as well, maybe do a search.

    http://www.procooling.com/index.php?...s&disp=52&pg=2

    http://wiki.ehow.com/Convert-a-Compu...b-Power-Supply

    Ken
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  3. 01-31-2006, 05:29 AM #3
    Oracle_9
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    Thanks for the links. I did a search but I hoped to get more info here.

    I was interested in doing one from scratch from circuit schematics for the desired values I have listed. But the PC PS types looks like the only available choices.
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  4. 02-01-2006, 02:59 AM #4
    H500
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    Why not just buy a car battery charger? The newer designs are switchers, so the output is likely regulated.
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  5. 02-02-2006, 01:35 AM #5
    pminmo
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    15-16V 10A Linear filtered unregulated is no biggy, but adding the 10A regulation becoms more the issue.
    A $21 transformer -> http://www.herbach.com/Merchant2/mer...egory_Code=XFR
    with a bridge regulator and big filter cap will get you the 15-16VDC input for a regulator. Will your charger handle a few more volts?
    Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
    Vist my websites - http://pminmo.com & http://millpcbs.com
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  6. 02-02-2006, 09:26 PM #6
    NC Cams
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    Schumacher Electric makes many types of transformer based battery chargers. They are affordable and can be bought cheaper than you can build on at Kmart and many other stores like Home Depot, Lowes and goodness knows where ekse
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