Hi ALl!
I just have built a scope clock with an AVR 89C4051controller at 24 Mhz.
I found the project on this page:
http://www.jogis-roehrenbude.de/...
Building was straight forward, except the scope tube there are no hard to get parts.
If you are interested I can email you where to get the tube for ~30 Euros.
If you want a "special" unique clock this on is really worth to think about.
Cheers
Rubi