This is a Nixie Clock project I started back in 2000 and finished in 2005. It took me 3 years to finish because I fried it twice :) That's what high-voltage tube power supplies do to TTL logic when you short the rails outs with a screwdriver... Schematics are handmade and somewhat ratty, but they are what they are. Source code for firmware included. Some bugfixes were done in 2005, but I don't remember what they were :) The clock still works and was repaired 3 times (floor drops that made the chips pop out, etc.) Nixie tubes were graciously provided by Kevin Horton in 2000. Code is provided under the MIT license (see file LICENSE). Enjoy ! - Tennessee Carmel-Veilleux <tcv -at- ro.boto.ca> January 19th, 2012