Has anyone ever tried to make 1960s-type incandescent digital displays?
ethan.dicks at usap.gov
Thu Aug 28 22:29:24 CDT 2008
I was recently watching "Goldfinger" and oggling the countdown timer
on the bomb. I don't think I've ever seen that type of display
technology up close, but in principle, it shouldn't be hard to
I was thinking that some sort of modern CNC would make short work of
the digit faces - just CAD up some outlines and bang out a few sheets.
Alternately, a pantographic sign engraver might do the trick, with
suitable templates whipped up either by hand on on a CNC.
The compact design for the type marked "KGM M4" looks intriguing as
well - a few slits cut in an aluminum back, and a simple PCB layout
for the bulbs (though I must confess I was contemplating white LEDs
rather than bulbs for a variety of reasons, including longer life
and simpler drive circuits).
As for driving it, I was thinking about something like a '145 O.C.
decimal decoder (as found in Commodore PET keyboard circuits and KIM-1
memory decoder and LED decoder circuits) per display. They aren't
particulalty expensive, and all you'd have to do is pipe in 4 bits and
let the '145 do all the work.
Nixies and other contemporary (and now faded) display technologies
are cool, but any of the glass-envelope types aren't exactly feasible
to reproduce in a home workshop.
Ethan Dicks, A-333-S Current South Pole Weather at 29-Aug-2008 at 02:50 Z
South Pole Station
PSC 468 Box 400 Temp -88.6 F (-67.0 C) Windchill -131.7 F (-90.9 C)
APO AP 96598 Wind 12.2 kts Grid 56 Barometer 657.5 mb (11489 ft)
Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html
More information about the cctalk