> >Of course variations in Vcc, temperature and the phase of the moon will
> >affect the WDT interval.
>
> At the Masters, Microchip had an app-note to do rather accurate (< 1C as I
> recall) temperature measurement using internal RC and WDT timeouts.  The
> RC osc is temp comp'd but the WDT is not.  This allows you to use the
> differential in a loop counter to give a pretty good idea of temperature.
>
> Andy

One of the things I was hoping to quantitise, finding the % spread over a
couple of dozen F84s. Don't need a thermometer right now but I might do
one day and it'd be nice to have my own empirical results for reference

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