> As I type this, my solenoid actuated mechanical slave clock is being driven > by my GPS receiver. The 1PPS signal drives a two stage divide-by-sixty > counter. The two counter stages, 7490 divide by ten and 7492 divide by > twelve used as a divide by six, are interfaced to two large Nixie tubes to > display seconds and tens of seconds respectively. I use a 7420 four input > NAND gate to detect "59" which is output to the slave clock driver. The > slave clock advances when the drive solenoid releases, hence it increments > at the end of the 59th second. The output from the divider section drives > the mechanical slave clock which displays minutes and hours. I hope to > finish breadboarding the control panel tomorrow and then start boxing up the > unit. Now, I am just comparing the sound of the once per minute, 1PPM?, > click of the slave clock movement to the voice announcements from CHU. > Sure, it is a strange clock, but I like the mixture of mechanical, Nixie, > and GPS. > > John WA4WDL
That mechanical mixture is music to my ears. Nicely done. One question - what happened to your clock after the most recent leap second, 12/31/2005 ;-) /tvb _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts