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Makers and Making: Nixie Clocks
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super_J_dynamite
Feb 27th 2006
I've come into possession of six new <a href="http://en.wikipedia.org/wiki/Nixie_tube">nixie tubes</a> with sockets.

Now all I need is schematics for a) real-time clock circuits and b) high-voltage nixie drivers. Or a schematic that combines them both. One design idea I had was to take a thrift store alarm clock that drives multi-segment LEDs and modify it to drive nixie tubes. If I go that route I'd only need the driver side.

I know there are a bunch of pages on the Internet about nixie clocks and kits, but I figured it couldn't hurt to ask in case somebody knows of a resource that I don't.

Thanks!
johns_az
Feb 27th 2006
There is a very active Yahoo group dedicated to all things nixie (I'm a member). Once you join, there's a fairly extensive file section...

http://groups.yahoo.com/group/NEONIXIE-L/

John
johns_az
Feb 27th 2006
I forgot to ask .....

What kind of tubes did you get?

John
super_J_dynamite
Feb 27th 2006
I'll check out the group -- thanks.

The tubes are Burroughs 5025 tubes.
johns_az
Feb 27th 2006
Okay. When you're looking at clock circuits, bear in mind tat you have a "biquinary" type tube. Most nixie tubes have one anode, and ten cathodes (one for each digit). A biquinary tube has two anodes; one for the even digits and one for the odd digits. Then, the cathodes are doubled; 0 and 1 share one pin, 2 and 3 share one pin, etc. Reducing the pin count on the tube is the only reason I can think of for doing it this way.

You can find more info on your specific tube at:

http://www.tube-tester.com/sites/nixie/data/b-5025-sh1/b-5025-sh2.htm

John
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