On Fri, Sep 29, 2006 at 11:20:12AM +1200, Jinx wrote:
>  
> > You could also do it all inside the PIC, having it run off a
> > 32kHz crystal.  Use the EEPROM or FLASH to hold the
> > event times.
> 
> My thought exactly, it takes very little processor time to
> check an interrupt count and compare to a table. Far less
> time than communicating with another device

True. But let me tell you from experience that the 32khz
crystal doesn't keep real good time. In my sunrise/sunset
controller there is definitly temperature drift.

Why isn't there an electronic component that works as well
as a $2 battery wall clock module?

BAJ
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