another brain cramp...question

Discussion in 'The Projects Forum' started by iONic, Sep 20, 2008.

  1. iONic

    Thread Starter AAC Fanatic!

    Nov 16, 2007
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    I have a meter movement with Internal resistance of 1K Ohms. I don't know what it's full scale current is, but I want to set it to read from 0 - 14VDC.

    Any clues?
     
  2. hgmjr

    Moderator

    Jan 28, 2005
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    The empirical method may be your best bet.

    You could take a variable power supply and a series resistor and hook up the meter all in series. Then starting with the power supply set to zero you could increase the voltage very slowly until the meter was at full scale and then do a bit of calculating to confirm the value of the current.

    hgmjr
     
  3. iONic

    Thread Starter AAC Fanatic!

    Nov 16, 2007
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    Thought I might have to do that. Maybe I can put my AnyVolt with 20 turn put into good use!!
     
  4. iONic

    Thread Starter AAC Fanatic!

    Nov 16, 2007
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    That worked well. A 10K resistor brought 14V to full scale.
     
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