Problems with RC2 and RC3


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  1. #1
    Join Date
    Oct 2005
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    New Jersey
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    Paul,

    I have located something abnormal. I took off all of the ULN2003A's from the board and I can get all of the outputs activated at the same time. Maybe current is the issue but it will require further investigation to determine where the problem exactly is.

    Thanks,

    Chris

  2. #2
    Join Date
    Oct 2005
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    New Jersey
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    Default Success!

    I have located the problem. On the ULN2003A (the one for PORTC), the negative pin was not soldered.....I must have overlooked it. When the ULN was trying to draw more current, it wasn't able to because of the high resistance between ground and the negative pin. Thanks to all who helped.

    Chris

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