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  1. #1
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    USBexpension card and poteniometers

    Hi i do have a question about the USBexpansion card.
    there are pin J7 to J10 which are for poteniometers. Which of the 3 pin's is the negative.
    and if using potentiometers do I need a power supply or not?
    regards,
    henri

  2. #2
    500+ This must be a daytime job



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    Re: USBexpension card and poteniometers

    hi Henri,

    Taken from the USB expansion manual, d/l from o/c i/o cards section.

    J7, J8, J9 and J10 connectors: These are used to connect analog inputs (10 K linear
    potentiometers). In the IOCards software we’ll define how many of these inputs we are
    using. Pin #1 (left side, GND) is connected to any of the potentiometer pins except the
    center one, pin #2 (center) which is connected to the center pin on the potentiometer. Pin
    #3 (right side, +5 V DC) is connected to the last pin on the potentiometer.

    If all you are going to drive off the M/C -Exp is pots and switches then p/s not required but still a good idea to do so especially if you are going to drive leds from m/c.
    Hope this helps.
    Les
    P.S d/l the manual i suggested,very helpful.

  3. #3
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    Re: USBexpension card and poteniometers

    Hi Iwik,
    ThX , i've been looking in the wrong manual.
    henri

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