Matrix _16f877 need help, please

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  1. - 7th February 2009, 17:27 #10
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    aratti
    aratti is offline Senior Member
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    Since you didn't use a limiting resistor, you have fried the pic!
    Replace it and put a 330 ohms resistor in series to every leds. Then use Joe snippet, given in post # 2 and you will see that leds will switch on and off without burning another pic.
    You will always read 1.6 - 1.7 V across a led, unless you have shorted one!

    Al.
    Last edited by aratti; - 7th February 2009 at 17:31.
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