Hi Christopher: I made up some prototype boards and have a couple of them out for beta testing, see: http://www.pacificsites.com/~brooke/PRC68COM.shtml#TVB There's been an issue with the SYNC function that depends on the source impedance of the 1 PPS. It seems that some sources are "weak" and can not drive a 50 Ohm load so the input load resistor needs to be selected.
My current project is a PIC based "precision clock" that uses a frequency standard as the external oscillator input. I've been working on versions of this for a number of years. For the current version see: http://www.pacificsites.com/~brooke/PRC68COM.shtml#PC3 and scroll down for a photo. I've got the leap year calculations working for Year/4, Year/100 and Year/400 and almost have Zeller's Congruence working for the Day of the Week. These are to replace the Microchip TB028 Day of the Week method that has a limited range. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Christopher Hoover wrote: >Tom Van Baak wrote: > > > >>>TVB-DIV is a frequency divider, designed by TVB, >>> >>> >>Quite a few people have used it over the years. >>The free source code is at: >> >>http://www.leapsecond.com/tools/ppsdiv.zip >> >> >> > >Are people just building these up ugly style, or is there a board design >floating about? > >-ch > > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
