This one is WWVB. Interfaces with serial port. http://www.buzzard.me.uk/jonathan/radioclock.html
All the time decoding done in software - UNIX/Linux oriented. I bought the module from http://www.hkw-elektronik.de/ -- Björn "Rick Karlquist" <[EMAIL PROTECTED]> writes: > Slightly OT: Does anyone know if there is an "atomic clock" > (the WWVB driven type) that interfaces to a PC via USB or > something, such that the PC time is regularly updated? > This would solve my PC time problem. (I need this to work > w/o internet access). > > Rick Karlquist > > > Poul-Henning Kamp said: > > In message <[EMAIL PROTECTED]>, "W. D." > > writes > > : > > > >>Is there a 'HowTo' for this somewhere? How many pins are=20 > >>connected and to where? Where do you mount the chip? Any > >>batteries involved? > > > > This is a little bit beyond "HOWTO" stuff. > > > > You need to find a suitable PLL chip. ICST is a major manufacturer > > of these. Most of them have anti-DYI pin-spacing though. > > > > Then you need to locate the Xtal on your motherboard which drives > > the clocks. Again, a good place to start is to look for a PLL > > chip from ICST. Usually there is a 14.318MHz xtal right next > > to that, but some botherboards use different frequencies these > > days and generate the 14.318MHz by PLL instead. > > > > You can then either remove the existing xtal and feed your signal > > to the right of the two holes (experiment or read datasheet for > > the on-board PLL chip) or you can try override it while it remains > > on the motherboard by feeding your signal into it. Overriding > > gives jitter and most modern motherboards don't like that. > > > > -- > > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > > [EMAIL PROTECTED] | TCP/IP since RFC 956 > > FreeBSD committer | BSD since 4.3-tahoe > > Never attribute to malice what can adequately be explained by > > incompetence. > > > > _______________________________________________ > > time-nuts mailing list > > time-nuts@febo.com > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > > > > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts