In article ,
says...

MJC wrote:
In article ,
says...

* As an apprentice project, I built a clock that used four 5x7 blocks of
neons for a digital display.

See https://picasaweb.google.com/1117418...CEDRICProject?
authuser=0&feat=directlink

Nice case. How old is that thing? What's inside?

Kind of you to take an interest! The whole project was carried out in
1964 (when I became 21). The neons were directly driven via a diode
array which encoded from up to ten numeral lines per digit. But I don't
remember whether we fitted all those diodes (I still have circuit
diagrams squirreled away!) into the display box or whether the cable has
5x7x4 wires, one per neon. There was a much bigger box which held the
rest of the circuitry and the large battery...

Mike.