Limitator of amps.

Discussion in 'The Projects Forum' started by Lightfire, Apr 17, 2011.

  1. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
    690
    21
    Hello,

    Is there any device which will cut the power after the maximum amperes has been cast?

    For example, I have a 12 volt battery/12 AH. I want only 6 amperes to be used. So I will put 6.00 as the maximum amperes. after exactly 6.00 amperes has been used, then the liimitator will automatically cut off the power.

    there will be a sign there indicating how many amperes has been used...

    is there any like that???
    thanks!!!
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    I think you want a disconnect when half the charge is used (6Ah).
    It is difficult because you must have a circuit that measures the average current and multiplies it by the time used by the current.
     
  3. eng1ne

    Member

    Dec 4, 2009
    97
    3
    What kind of load will it be supplying?

    If current is drawn at a known, steady state, you could measure the terminal voltage to determine the charge state of the battery - as long as you have the battery charge curves.

    It will be affected by temperature though and any basic circuit might not be very accurate!

    Just make sure you know that you are dealing with a probably, potentially dangerous piece of electrical equipment there - SAFETY FIRST!
     
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