A neon-filled nixie tube has multiple filaments, one for each digit zero through nine. We use IN-12A type nixies for the "From Russia with Love" effect.
Each NIXIE DUO board supports two nixie tubes and mates with a NIXIE DRIVER board. You can stack 'em and string 'em together end-to-end for large important numbers.
We've got lots of projects in the works for these digit pair modules, all driven by open source tools.
Web site: http://www.ogilumen.com/nixie-2xd2x-p-92.html
Video URL: http://www.ogilumen.com/ogilab/images/electrowave2.gif
David Floren
Electronic artist and sculpture technician. Toiling towards all things having luminance with optical tricks and electronics.
http://ogilab.ogilumen.com