[time-nuts] Odd request

[Tom Van Baak]

> 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