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Thread: Power Drain Sensor

  1. #1
    Newbie
    Join Date
    Sep 2008
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    21

    Power Drain Sensor

    FB received and is an amazing piece of hardware for its $$. Thanks!

    The software till you got the feeling how things work (thanks to the YouTube vids) is very usable and flexible. My skin is allready ready.

    BUT i have problems with the power mtr sensor (OS: Vista).

    Using the supplied with the soft skin i can see random values on the first 2 inputs and steady 0 to the others, no matter on what pins i connect the sensor.

    I find the rigth orientation of the sensor's plug from the start, no inverse connections. 5v on pin 1 on the sensor.

    i put a 2A load on it and tried all the ports, no change at all. BTW: analog inputs pin 1 is near the digital pins?

    Any ideas?

    thanks in advance
    Panos, SV1COX

  2. #2
    Fusion Brain Creator
    Join Date
    Mar 2005
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    2,221
    Can you take a screen shot of the sensor connected, and the virtual brain option enabled in MDX?

  3. #3
    Newbie
    Join Date
    Sep 2008
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    21
    i didnt really understand what is that about: "and the virtual brain option enabled in MDX?"

    but here are some screenshots:











    do you mean you need a photo from the board with the sensor connected too?

    thanks again
    Panos

  4. #4
    FLAC
    Join Date
    Oct 2006
    Location
    Las Vegas
    Posts
    1,286
    In the configurator, there is a little ladybug icon up top. click on it and you will see an option for running MDX in debug mode, one of the further options is to enable 'virtual' brains for any brain you have defined in the skin (or via configurator-same thing). Select debug and that option and save, and the next time you run MDX you will see the virtual brain that he's talking about.

    screenshots are broke.

  5. #5
    Newbie
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    Sep 2008
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    ok , got it, thanks.



    2.5V or ~62 (X25) with no load on pin 9 (port 8?).

    Panos

  6. #6
    Fusion Brain Creator
    Join Date
    Mar 2005
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    That's perfect, the sensor should be at 2.50 volts with no load.

    How about a 10 amp load, and retake the screenshot?

  7. #7
    Newbie
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    Sep 2008
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    10Amp???? no i can not do that, actually i need to monitor a load with a peak around 3Amps, now i can load it to 2A is that sufficient?

    Panos

  8. #8
    Fusion Brain Creator
    Join Date
    Mar 2005
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    sure, do that, but it's rated for 50 amps, so full scale at 50 amps is Vnominal + 2.5 volts. Thus, you will only be at 2.15 at your 3 amp load - pretty low resolution.

  9. #9
    Newbie
    Join Date
    Sep 2008
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    21
    aha i see, so the preconfigurated Current Sensor Function is out of date? (Vinput X 25 = A) ??

    i have to change it to: [Vinput - 2.5] X WHAT?

    what is the value of Vnomimal please? 5V?

    i will do tests with the new function and i will report tommorow (around midnigth here now).

    Can you confirm me that pin 9 is port 8 please?

    thanks again and congrats for the excellent product and suport.

    Panos

  10. #10
    Fusion Brain Creator
    Join Date
    Mar 2005
    Posts
    2,221
    (Vinput-2.5)/.05 = amps

    What do you mean about Pin 9 and Port 8?

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