What are you planning to use for a readout/display device?  I've thought
about this but I never came up with a display device that was as easy to see
and read as a standard speedo.  Maybe rotating (fixed rate) pointer with
super bright LEDs a-la Bob Blicks clock might work well.



At 05:23 PM 2/23/97 -0000, you wrote:
>Hi.
>I plan to attempt to make a spedometer type thing.
>It's input is from a hall switch, which is passed by a magnet once per turn
>of the wheel.  I need a unit to take this sensory input and display the
>speed on an LCD display.
>I was thinking that the prog would revolve around...
>        wait for a pulse
>        time until next pulse
>        divide the distance round the wheel by the time between the two pulses
>        display it...
>
>I was planning on using a pic16C84 as it is easy (and cheap) to program.  I
>have very little experience with PICs, my main use of assembler based on
>6502.
>
>I was wondering if in the 16c84 there is a timer capable of this task, and
>how i would use it (preferably in mpasm).
>
>Thanks,
>        Daniel.
>
>
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