Paul, thanks for the suggestions. The top of the minute is a good idea. Since the first second is part of the sync pattern it will always be 0 and the phase would be 0. A differential opamp with one input from WWVB and the other from the local source fed to the STM32 would tell if the signals were in phase. A single gate inverter controlled by the STM32 could be used to invert the local source if necessary.
I have worked with the Bluepill for the last year on a few small projects. The most complex one (which isn't really complex) was to control two stepper motors. I really like the boards and you can't beat the prices. I don't use the bootloader so I have no experience with it. Dana, I looked at the Costas loop and had sort of ruled it out. I may take another look at it as I get further into the project. I will probably use a 15.360 MHz oscillator and divide by 256 to get the 60 kHz local source. Once I get the front end working I will be able to start some "real" testing. Suggestions from others are welcome. Ray, AB7HE _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
