Palfreyman, Jim L wrote: > Hi Folks, > > What is the most accurate wrist watch you can purchase? Obviously the > radio controlled ones are the best, but I'm curious as to the fully self > controlled units. > > Oh and yes I have seen the photo of the caesium clock attached to > someone's wrist! > > Also, on the NIST website they talk about a new development - the atomic > clock the size of a grain of rice. I see this as having huge future > potential. Does anyone have any news on this development? > > Oh and yes I want one! > > > Jim Palfreyman
Jim, My Nixie tube wristwatch is pretty darn accurate for a wristwatch - it can be adjusted to about one second per week accuracy. It has a trimmer capacitor for fine tuning. I use an HP 5245L counter in period-average mode to do the adjusting. Its microcontroller chip is programmed with open-source code, so you can mess with the programming if you like. --David Forbes http://www.nixiewatch.com/ _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts