Re-engineering diodes in a Battery Charger

Discussion in 'The Projects Forum' started by Gdrumm, Feb 6, 2010.

  1. Gdrumm

    Thread Starter Distinguished Member

    Aug 29, 2008
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    I'm working on an old automotive battery charger that had no diodes to convert to DC. I made something from scratch, which ties (8) 4002 diodes to the back plate, and I am now getting 9.6 volts DC.

    AC Output from the transformer is between 12.6 and 16 volts, depending on cycle and amp selections.

    I'm not sure if I should use less diodes, or more diodes, to achieve 12 volt DC output.

    Any insights would be helpful.

    Thanks,
    Gary
     
  2. mik3

    Senior Member

    Feb 4, 2008
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    63
    You need only 4 diodes to convert an AC soucre to a DC one. Google bridge rectifier.
     
  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Probably should be a 35A or 50A bridge, at that.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    It would help a great deal if you could post some photos of the charger.
     
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