After cleaning out the garage a few weeks ago and stumbling across my good old ZX81 (well, TS1000 really), I thought it would be quite interesting to turn it into a Nixie Clock!
Here's the result:
http://xiac.com/Images/ZX81NIXIECLOCK.jpgI designed it with TTL logic, no SMD components here. It is direct drive using 4 K155ID4 drivers.
If there is enough interest, I will offer this clock as a kit.
Michel