29 Feb
2008
29 Feb
'08
6:35 p.m.
On Feb 29, 2008, at 6:45 PM, Tony Duell wrote:
Some of these were sold under the name "numitron". I have a few
here; I like them, they've got personality. Here are some pics of one
in operation:
http://www.neurotica.com/misc/numitron-powered.jpg
http://www.neurotica.com/misc/numitron-incrementing.mov
-Dave
--
Dave McGuire
Port Charlotte, FL
Does anyone
know when seven segment displays first appeared on the
scene?
Presumably the first ones were VF, and LED came later?
There were some filament ones -- 7 long filaments in the obviosu
pattern,
in an evacuated envelope. Some looked like vavles (but were generally
wire-ended), others were ina flatter package, looking a bit like an IC. 