I am thinking about making a no-microcontroller clock/timer/stopwatch (74 series ICs only + passive components, preferably). To make it as simple as possible I want to have a 1Hz clock as the basis for the system. Any ideas on how to get an accurate 1Hz clock? I was thinking of either using a 555 timer (is that accurate enough, though?) or a 32.768kHz crystal w/ a frequency divider.