Is all this worth the effort to save 50 cents or whatever for a ceramic
resonator with built-in capacitors? The resonator even takes less board
space (unless you go surface mount with the resistor and capacitor).

Harold

On Fri, 17 Aug 2001 17:54:22 -0500 Jeff Frohwein <jeff@DEVRS.COM> writes:
>  "You can find a low-frequency, stable clock source and use it to
> calibrate a baud-rate generator or event timer. One source of a
> low-frequency, stable clock is the line voltage. This voltage is
> a good source 50- or 60-Hz frequency that you can easily interface
> to the microcontroller's 16-bit timer. By counting CPU cycles for
> a half cycle of the external clock, you can determine the frequency
> of
> the microcontroller's internal RC oscillator and calibrate the baud
> rate."
>
> Link to EDN story: http://www.devrs.com/pic/
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>
>

FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

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