led matrix pic 16f84 and 4017 help me please


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  1. #14
    Join Date
    Feb 2007
    Posts
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    define osc 4
    porta = 0
    trisa = 0
    portb = 0
    this as well:
    trisb = 0

    porta = %10010
    pulsout portb.0,150
    pause 10
    porta = %11001
    pulsout portb.0,150
    so on .......

    Maybe worth changing the 'pause 10' to 'pause 1' if your display is flickering.

    does your 4mhz crystal have 2 caps (18 - 22pf) between each leg and ground?
    not shown on your diagram.
    Last edited by wellyboot; - 18th July 2009 at 20:49. Reason: missed something

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