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?
The logical and high-tech solution would be to simply use an RTC which has a precision 1Hz output!
The logical and high-tech solution would be to simply use an RTC which has a precision 1Hz output! Or, you could use a receiver for the time signal radio service wherever you are on the planet. Is there some reason you don't even reveal which continent you are on?
QuoteLine frequency is not that accurateFor the purposes of long-term time accuracy, power mains frequency is just as accurate as the NITS Atomic Clock. Because all the utility companies maintain the grid frequency against WWV.
Line frequency is not that accurate
If you have a 12 bit counter, why not go all the way to 15?http://focus.ti.com/lit/ds/scls704a/scls704a.pdf
Yeah that 'NITS' atomic clock isn't all it's hyped up to be ;-)