19 Oct
2006
19 Oct
'06
9:35 p.m.
I have a small handful of crystals and was wondering what the easiest
way to divine their frequencies... I can say that I'm reasonably
certain that all of them are between 32.768Khz and 50MHz, but some are
blank, and some have non-obvious cryptic markings. What I'm looking
for is some simple way to get them to oscillate and measure them with
a frequency counter (i.e. - assume one is starting with a working,
trustable frequency counter).
Is it as simple as a pair of inverters/NANDs in the classic crystal
loop, or is that circuit massively frequency dependent (i.e. - works
for 1Mhz-10Mhz, not faster or slower...)?
Thanks for any suggestions.
-ethan