I realize this is "zero long term error", but what would be the error during
short durations.  For example, what is the error per second for say a 5-10
second duration.  My application will require resolution to 0.001 sec for
about 5 to 10 seconds at which distance data will be plotted against time.
The actual "second period" created by my microcontroller only has to be
within +/- 1% of the actual scientific "Unit Second", but it has to be
accurate from second to second over that 5 to 10 seconds.

Thanks
Dan



> I just want to say that after reading Roman's page, I was
> thoroughly impressed
> with it!!! Good work Roman :-)
>
> Simple question though, and I think the answer is obvious.
> The "zero long term
> error" point is assuming the crystal (or whatever is used)
> doesn't vary over
> time and acts perfectly, correct? Or does this take that into account?
>
> Quoting Hazelwood Lyle <LHazelwood@MFGNC.COM>:
>
> > >> Anyways, my PIC application will require an accurate 1
> second internal
> > >> counter for timing, but does require a system clock
> speed of 4-20Mhz.
> > >
> > >Look in the archives for the thread, "[PIC]: simple
> one-second timer".
> > >Roman and Bob (Blick, I think it was) came up with a
> method I have used in
> > >numerous projects.  I can post C code for my
> implementation of it, but
> > >that's in the archives too from a few months ago.
> >
> > I believe that Roman has also posted some of this on his website.
> > http://www.romanblack.com/one_sec.htm
> >
> > Lyle
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu
> >
>
>
>
>
> ----------------------------------------
> This mail sent through www.mywaterloo.ca
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu