JMRI track current meter

rva1945 Jun 27, 2016

  1. rva1945

    rva1945 TrainBoard Member

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    Hi:

    I don't understand how it shows the currnent drain. It shows something like

    2 : 9 %

    while I expected to see milliamps or amps.

    How should I read it?

    Thanks
     
    rva1945, Jun 27, 2016
    #1
    Scott Eric Catalano likes this.
  2. firecrac

    firecrac New Member

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    2.9 Amps
     
    firecrac, Jul 25, 2016
    #2
    Scott Eric Catalano likes this.
  3. rva1945

    rva1945 TrainBoard Member

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    No, it can't be 2.9 amps. The motor I'm using draws 600 mA when stalled.
     
    rva1945, Jul 25, 2016
    #3
    Scott Eric Catalano likes this.
  4. Jirka

    Jirka TrainBoard Member

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    29% ?
     
    Jirka, Jul 25, 2016
    #4
    Scott Eric Catalano likes this.
  5. conrailandrew

    conrailandrew TrainBoard Member

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    It's been a couple months since I had the time to mess with my DCC++ stuff, but if I remember right, I think it means that it's drawing 9% of 2 Amps, since the original motor board used was rated for two amps.

    That would mean it's drawing about .22 Amps, or 220 milliamps if my calculations are correct.

    I could be way off base here, TD will know for sure.

    Andrew
     
    conrailandrew, Jul 25, 2016
    #5
    Scott Eric Catalano likes this.
  6. Jirka

    Jirka TrainBoard Member

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    Compared with the Traffic Monitor which shows for example "9/1024". Arduino analog input has 1024 levels, so proximately the value shown by the Current Monitor is percentage of the full measuring range (whatever is the sensitivity set by DCCpp firmware) , I believe.
     
    Jirka, Jul 25, 2016
    #6
    Scott Eric Catalano and conrailandrew like this.

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