12 v DC Load tester

Discussion in 'General Electronics Chat' started by ahitechs, Sep 30, 2010.

  1. ahitechs

    Thread Starter New Member

    Sep 30, 2010
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    we want to test the load of 12 v DC supply , up to what maximum current limit it can deliver to load , any good load tester can you suggest ?
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
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    What range do you need? 0 to 1 amp? 0 to 10 amp? 1000 amp?
     
  3. ahitechs

    Thread Starter New Member

    Sep 30, 2010
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    tanks fot the reply , we need atleast 10 -20 amp load test
     
  4. Wendy

    Moderator

    Mar 24, 2008
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    There is a piece of test equipment called an Electronic Load, basically it is a programmable constant current source with lots of fans.

    You could always get lots of resistors, around 10-15W resistors X20 should do it.

    Or you could make a quick and dirty electronic load with a bank of transitors on a heat sink.
     
  5. ahitechs

    Thread Starter New Member

    Sep 30, 2010
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    Thanks Bill
    Will you please help me to design that circuit, I need some more detail .
    Hope for your support.


     
  6. retched

    AAC Fanatic!

    Dec 5, 2009
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  7. marshallf3

    Well-Known Member

    Jul 26, 2010
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    This weekend Harbor Freight has a 12V battery load tester on sale for something like $12.99. I haven't looked at it but if it's like most normal battery testers it will have a simple ammeter movement included, although the scale may only be good/?/bad but easy enough to interpret.

    Yup, here it is and it won't be much higher than $12.99 if you can't make it over there by tomorrow.
    http://www.harborfreight.com/100-am...=finalday&utm_medium=email&utm_campaign=3910B

    You want item #90636
     
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