AVR-Chat

I am doing a tach project and timing is important.

As I understand, resonators are lower accuracy than crystals, and many
resonators have internal caps.  Easier to install, and often not very
important.

I have wondered just how important the associated capacitors are for
accuracy?

But for the tach, timing becomes much more important.

As I understand, there are two ways to go.

count till you hit a number, then check how long it took. or to select
a time period and count how many pulses occured in that window.

If I'm missing something, please let me know.

If anyone has anything that might help, I'd be glad to find out.

So, the questions comes down to component selection.  For a tachometer
with a rate up to 35khz, what would be a good choice ?

Dave