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
