Interrupt RPM and Taylors Elapsed time on 18F4620


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  1. #1
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    I rive in China. The address in my bio is just to confuse people.
    Charles Linquist

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    Theoretically I should be able to swap oscillators and the problem will be on the 877A. Give me a bit and I will try that.

    Here is a link to the one I have on the boards.
    http://mouser.com/ProductDetail/Kyoc...XFVfiWpjmqo%3d
    Last edited by Tobias; - 29th January 2010 at 16:53.

  3. #3
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    I think Darrel nailed it with the oscillator problem. Nice catch. I just assumed you were
    testing different PICs on the same board.
    Regards,

    -Bruce
    tech at rentron.com
    http://www.rentron.com

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    its the osc. I had no idea there could be that much variance. Can you suggest a better part number?

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    Woohoo!
    I can taste it already.

    DT

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    Quote Originally Posted by Tobias View Post
    Can you suggest a better part number?
    The datasheet for that resonator shows that they have other versions of the same thing but with tighter tolerances (down to 0.1%).
    At least it will have the same footprint.

    With 0.1%, at 6000 RPM it will read between 5990-6010. (according to proteus).
    DT

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