Max Skop wrote: > How does one get a 32.768KHz signal from our 10MHz reference. > There does not appear to be a nice divide ratio to do this. > With a locked 32.768KHz signal one could lock the oscillator of any of the > cheap (low cost) LCD clocks that are available with nice big digits, > temperature sensors and calendars, etc. > Any suggestions on how to do it??
I would consider locking a 8,192 MHz crystal to the 10 MHz. The comparator frequency of 16 kHz using a division of 625 from the 10 MHz and a 512 from the 8,192 MHz oscillator. The 32,768 kHz output can be generated by first dividing by 125 and then a division by 2 for propper 50% pulse ratio. Not too complex and the comparator frequency is high enought for a nice filter should be able to do it. I would use a SR flip-flop for phase detector. For this kind of work they work very well IMHO. Cheers, Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.