On Wed, 12 Jun 2002, Pic Dude wrote:

>There are other little bits and pieces too, other than the
>1Mhz req.  See 15.103 for specifics.
>
>BTW, I wanted to use a 1Mhz on the petfeeder, but the
>odd thing is that digikey lists these for $7+ ea, while
>131.072khz, and 4MHz crystals are approx $2 ea.
>
>What gives?

1MHz is fairly rarely used and it could be a special cut. You need to
order a special-cut crystal to realise just how cheap $7 is ...

Anyway when I have something really slow to do (like clocks and such) I
try to do them using 32kHz crystals. I have made two timers so far that
used 50Hz as clock (12C508).

Peter

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