led matrix problem

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  1. - 4th September 2011, 09:42 #1
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    dellpc
    dellpc is offline Junior Member
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    Default led matrix problem

    i had made a 16*(5*7) led dot matrix scrolling display with pic 16f628a and 74hc595 as cathode column drivers and 74ls138 for driving the rows and pnp transistors to the rows its not working onling some colums were running from right to left some body help me
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