> I just purchased the kit and was looking at the parts list (schematic
> will come later, i'm at work right now) and found it a little
> disconcerting that there isn't a 32.768khz crystal (i.e. 1/2 second
> for a 16-bit register). This frequency of crystal makes it
> tremendously easier to build something that keeps time. Also, since
> they are relatively slow, they can be pretty accurate, even for a
> cheap one. Otherwise, you are at the mercy of either the internal
> oscillator of the uC, or in this case, the 16mhz external oscillator.
> It is not uncommon for these things to float a LOT (even though they
> say this one is 50ppm, according to Mouser) due to temperature and
> other environmental things, which would make a time system based on it
> float also.

> Unless I am missing something, which I very well could be.

> --Daniel