[time-nuts] Best Nixie clock, ever.
dforbes at dakotacom.net
Thu Dec 15 15:03:07 EST 2005
That is quite the nixie clock. A real labor of love.
It's interesting to note that he used none of the tube-saving tricks
that HP used in their nixie instruments. Another nixie clock builder
in the USA did use these tricks and ended up with a smaller, but not
as lovely, all-tube clock:
For example, HP used a 4-bit BCD counter to drive 8 neon bulbs, then
made a BCD-to-decimal decoder from a hybrid photoresistor network to
drive the nixie cathodes. The German fellow used tubes to do the
He also didn't use phantastron divider circuits, which will divide
frequency by ten with one tube (but only for fixed frequency, such as
you get in a clock).
I have an old HP frequency counter that uses about 60 tubes to achieve
a 5-digit display with A and B trigger inputs, 10 second gating
derived from a 1 MHz crystal, etc. Its fan is rather too noisy to be
in a clock, though.
Whatever... nixie clocks are wonderful, no matter how they're made.
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