On Sunday, Jan 18, 2004, at 13:33 US/Pacific, Jinx wrote:

>>
>> True, but just using the closest divisor from the 5MHz instruction
>> clock is still far more accurate and stable than a 555 timer.
>
>
I'm curious.  Why do you expect the PICs internal (RC, right?) clock
to be more stable than an external (555 based, and still RC) clock?
I thought on-chip resistors and caps tended to be a bit LESS stable
than (good) discrete parts...

A bit academic in this case; for an automatic firing circuit, it might
be handier to have a pot you can twirl to change rate, compared to
having exactly 60Hz...

BillW

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