regulated car battery charger schematics

Discussion in 'General Electronics Chat' started by tinkerman, Dec 26, 2012.

  1. tinkerman

    Thread Starter Member

    Jul 22, 2012
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    Anyone have suggestions or schematics for building/converting a 12 volt car battery charger to one that has more control for float and current limit? I have an old schematic modifed from a large industrial 120 volt circuit. It works fine but there ought to better modern units.
     
  2. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    How much current required?
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,138
    1,789
    Gee the ones you can buy at Walmart or Sam's Club for $40.00 look pretty impressive to me. Don't think I could build one for several times that price. They handle 10-15 Amps of charging current.
     
  4. tinkerman

    Thread Starter Member

    Jul 22, 2012
    136
    34
    My chargers are 20 and 25 amp. Got lots of old parts and my old home built unit uses SCR and old common parts but I thought there might be something that use integrated circuits etc and wouldn't cost much. I don't have the ability to design such a circuit. I haven't looked at what Wallmart has for sale.
     
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