Yes, CERAMIC resonator on a 16f84a at 20mghz.  The digikey part # is
X909-ND - it has caps and all in one package.

The project is an animal feeder that I would like to have no more than 5
minutes error a week.  I am working on a serial interface (possibly using a
16f284 that will allow me to reset the time through a PC making the current
error tolerable.

Thanks



> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of David W. Gulley
> Sent: Friday, May 31, 2002 11:16 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC] Crystal Resonator Reliability
>
>
> Rex Byrns wrote:
>
> > I tried the one-sec routine that was recommended by Roman.  It
> is working
> > better than my old code, but I still come up short, over 6 hours I
> > accumulated almost 20 seconds of loss. (assuming it hadn't
> completely lost
> > over a minute)
>
> Your subject line says crystal resonator, your accuracy seems more like
> a ceramic resonator.
>
>
> Just what device are you using?
> What is the spec'd accuracy of the device?
> What components do you have on the oscillator (e.g. trim caps)?
>
>
> David W. Gulley
> Destiny Designs
>
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