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  1. #8
    Join Date
    May 2008
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    Italy
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    Default Re: 16f84A to 16f628A

    RA4 is an open collector pin so it will not turn from zero to 5 volts as all the digital pins.

    If all you need is to turn your led on & off, then connect your 330 ohms resistor to 5 volts and RA4 pin to junction from led and 330 ohms resistor.

    Remember then when pin is on your led will be off.

    Cheers

    Al.
    Last edited by aratti; - 27th June 2012 at 17:06.
    All progress began with an idea

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