25 May
2005
25 May
'05
4:14 p.m.
You might want to look at the following book:
"1966 Applications of Neon Lamps and Gas Discharge Tubes."
By Edward Bauman, Signalite inc
There's an online version of the book at:
http://homepage.ntlworld.com/electricstuff/oldbooks.html
Chapter V covers "neon memory switches". Pretty cool stuff. I
especially liked the bistable multivibrator (aka flip-flop) using 2 neon
lamps.
On Wed, 2005-05-25 at 15:55 -0700, Tom Jennings wrote:
On Wed, 25 May 2005, Eric Smith wrote:
--
TTFN - Guy
Tom wrote:
I stand corrected!
I think your idea is generally right, but this
detail seems wrong:
when X goes from +7.5V to 0V, the entire line will see 105V,
striking the entire line.
Nope. I wrote:
Ahh... the Nixie lit explicitly talks about element life. If one
element is held lit for long term you get a limited life; if it
varies as much as once a day life dramatially increases. I think
for memory purposes we'd be safe...
I think the numbers were "short" life 10K hours, "long" 100K hours.
I bet it's also dependent on current.
app note here:
http://wps.com/archives/Burroughs/index.html
I think paper N102.
Will neon bulbs have reduced lifetime if you run
them on DC?
Tom wrote:
As far as I can tell from reading literature,
basically the metal
electrodes develop non-conducting surfaces (eg. oxidation) from
impurities in and outgassing from the glass and metal.
Chicago Miniature Lamp says that DC operating life is 60% of AC.
However, the lifetime specs given for "circuit element" lamps (as
opposed to "indicator") are for DC.