Might take a longer time per sample;  you might want to median filter
(with sanity checking) a few samples to get an even longer effective
timebase?

  Mark

Russell McMahon wrote:
>
> The frequency meter which is being discussed at present sounds like
> an ideal solution to the electronic component - it should just
> require a rescaling of the time base to get the range correct.
>
> regards
>
>         Russell McMahon
>
> From: Andy Kunz <mtdesign@FAST.NET>
>
> >Anybody have any hints on designing an audio tachometer, or better
> yet, do
> >you know where I can buy one.  I need a 50Hz to 10KHz range.