Hi Lee, It's not likely you can directly multiply 1PPS up to 32 kHz, but it's easy to divide 10 MHz down to 32 kHz. See http://leapsecond.com/pic/src/pd30.asm for a $1 PIC example.
A stand-alone 10 MHz OCXO or the simplest possible GPSDO would work for your digital clock project. Chris and Nick and many others have shared low-cost Arduino-class examples to the list over the years. Another example is the MCU-less James Miller design which uses a PLL at 10 kHz. Contact me off-list some day when want a Trimble Thunderbolt; they are still available. /tvb ----- Original Message ----- From: "Lee - N2LEE via time-nuts" <[email protected]> To: <[email protected]> Sent: Tuesday, October 18, 2016 7:03 PM Subject: [time-nuts] 1PPS to 32.768 khz First let me say this is first time I have posted to the group so go easy on me. :) Secondly I want everyone to know that you guys make me feel so NORMAL for wanting to use and understand accurate timing devices. I thought there was something seriously wrong with me now I know there are others affected with the same disease. hehe Now my questions. 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. I have searched every where using as many search terms as I can think of and can’t believe there is not a device that performs this function. I have found a couple of Epson RTC chips that might come close that 1pps but I don’t think that corrects the 32khz just the clock time. 2. 10 Mhz Freq Standard I am not in the same league as the majority of the list members and just starting to dabble in GPSDO stuff. I have tried to find a thunderbolt as a starting device but it appears those are either dried up or people want too much money. I wanted to get the opinion of anyone who has tried the Leo Bodnar GPSDO ? For the money it appears to offer a beginner a lot of features. Thanks and reading the daily digest of what you guys are working on. I have a feeling if I am not careful you guys could cost me a lot of money. hehe Lee _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
