I/O pin default low.

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  1. - 31st May 2023, 16:32 #13
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    Default Re: I/O pin default low.

    Quote Originally Posted by Acetronics2 View Post
    Top secret electronic ignition ??? ....
    MC3334P clone ?

    - ADC inputs have a maximum input feed impedance to respond as fast as required ... see Pic datasheet for details.

    so, I presume @ first sight your current detection is wayyyy too slow, and your coil enters saturation ...

    add to that your IPB protection is wayyy too weak and slow !!! be prepared for in-use failures, after some running time.

    Now, automotive circuits need lots of filtering to avoid pic supply surges ...

    Alain

    no - not a clone of MC3334P - it just turns on a load if IG is present.
    by the time I get the IG signal its been filtered.

    What coil?

    IPB?
    Last edited by pescador; - 31st May 2023 at 16:39.
    My dad never liked you...
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