You guys are great. I especially like the more creative solutions that could take this project to a different level.
I should have known that my request was not a simple one. :) While going from 1 PPS to 32.786 is not as easy as I had hoped what I find odd is that others must have been looking for this same solution. Hard to believe an innovative chip designer has not solved this problem. I have been able to find solutions that come close. For example Epson /Seiko makes a RTC chip with a built in TCXO that will let you use the devices 32khz oscillator and it allows for 1 PPS input. BUT (always a but) I don't think it corrects the oscillator just the RTC clock. (I think). http://www5.epsondevice.com/en/products/i2c/rx8803sa.html I have to tell you guys the recommendations I am getting are great even if they don't solve my exact solution. The reason is you are giving me a lot to think about and research which means I am learning. I LOVE That ! :) Keep the ideas coming and thanks for your patience. Lee On Oct 19, 2016, at 9:15 AM, Dave Martindale <dave.martind...@gmail.com> wrote: > If the "big digital clock" doesn't display the time with fractional-second > precision, then it only needs to be updated at 1 Hz, which can be done with > the 1 PPS directly. Consider replacing the 32 kHz crystal, divider chain, > and microprocessor with a new microcontroller that takes 1 Hz input and > drives the display in the same way. > > For an extra bonus, use a microcontroller with a serial port, and connect the > GPS receiver serial output to the serial port on the micro. Then you can > decode the serial data stream from the GPS, and automatically set the clock > to the correct time after a power failure - something the original clock > could not do. As a double bonus, make the clock display leap seconds > correctly when they happen. > > - Dave > > On Tue, Oct 18, 2016 at 10:03 PM, Lee - N2LEE via time-nuts > <time-nuts@febo.com> wrote: > > 1. Does anyone know of a device that will take a 1PPS GPS timing signal and > generate a 32.768 kHz sine wave output ? > I have big digital clock that uses an 8 bit micro processor and an external > 32.768 crystal. Obviously the external crystal is > awful for accuracy. > > _______________________________________________ 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.
