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12 volt charger

Discussion in 'Electronic Basics' started by kenny, Aug 12, 2003.

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  1. kenny

    kenny Guest

    Anyone know a simple 12 volt charge schematic with an auto stop when the
    battery is charged.
    I have been looking the internet but no luck yet.
    My neighbor had one but moved away. It was a simple 15 volt power supply
    with a small box ( 3 inches by 1 inch ) and two alligator clip at the end of
    that. The little box was part of the wire with a double led light, red
    charging and green charged.

    thank you
     

  2. Presumably you want a 12V lead acid charger right?


    Get yourself a decently robust DC powersupply (say good for 16V+ at 2.2
    Amps+, an old laptop computer powersupply would probably work well) and a
    PB137 device from some place like Mouser. Datasheet at:

    http://us.st.com/stonline/books/pdf/docs/6278.pdf

    Slap a heatsink on the device and call it a battery charger.
     
  3. roma

    roma Guest

    Go there http://members.shaw.ca/roma/twenty-seven.html
    roma
     
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