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Variable speed motor fan - Help Needed!

Discussion in 'Electronic Design' started by [email protected], Nov 9, 2006.

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  1. Guest

    Dear all, here is the situation I've struggling with:
    I have a DC variable speed motor fan that sometimes works and sometimes
    doesn't .
    It has 3 terminals, one common, one for 12 V and the other 9V. The 9 V
    terminal I believe is the one used to control the fan speed. I really
    don't have a clue why this motor is so unstable. Any hint???
    tks in advance
  2. default

    default Guest

    Give us a lot more information.

    tks in advance
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