"Mike Gilmour" wrote
Thanks, your post just nudged my memory & brought back to me something I'd
completely forgotten about. Countless years ago while doing radio training I
designed and built a 12 hr digital clock using lots of 74 series ic's & 6
nixies hh/mm/ss compete with nixie drivers. Can remember thinking the logics
out on how to go from 12 to 1. The clocking was initially 50hz mains freq
& schmitt trigger to square it , remember messing around with Xtal clocking
later on. It kept time really well but trouble was everytime there was a
lightening storm the thing went haywire. Never got around to 'scoping the
clock during a storm.....went on to another project.

Yeah, embarrassingly, I clocked my freq counter off 50Hz mains! Pretty
useless really, and I intended to raid a cheap garage digital watch
or perhaps with more prospect of luck, an electromechanical quartz-driven
clock movement, for a 1Hz source, but again, never got round to it.

Also a coincidence that you mention nixie clocks, because I
REALLY WANT ONE now! But I've looked at the prices on the web,
and can't justify that at the moment, and can't be bothered
going though the hassle of making one myself now, because I don't
really do electronics any more.

But one day, I would really like to get my hands on a nice
nixie clock; it's in the same category as valve stuff with me.


Martin
--
M.A.Poyser Tel.: 07967 110890
Manchester, U.K. http://www.fleetie.demon.co.uk