LM135 voltage ref

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  1. - 3rd April 2008, 12:32 #3
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    Acetronics2
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    Hi,

    Let's see

    Ambient temp is ~ 300°K LM 135 outputs 3v

    ADC Counts = 3/5*256 = 153 ... that's OK


    mmmmmmh, what about connecting AN3 input to Vss ... and making it an input (!)

    or MUCH BETTER correcting your ADCON1 settings ...

    cause , for now, you do not have any Vref at all ...

    AND you've forgotten to connect the second GND ( or VSS ) PIN !!!

    Alain
    Last edited by Acetronics2; - 3rd April 2008 at 16:09. Reason: GND PIn !
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
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