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echo: electronics
to: MIKE ROSS
from: Roy J. Tellason
date: 2003-01-16 20:00:50
subject: HVDC TRANSMISSION LINES

MIKE ROSS wrote in a message to Greg Mayman:

 MR> I think GM has it reversed, LCD's don't work well in the cold. They

 GM> True, but they die after too many spells of high temperature.

 GM> Hmmm... if they slow down in the cold, do they speed up and wear
 GM> themselves out in the heat? Just a thought...

 MR> Yes, in the cold LCD displays look like slowmo replays on the 
 MR> sports channel when the temps get below freezing. You can see each
 MR> segment turn on one at a time.

Wouldn't that be a function of the logic that's driving them?  I know that
some stuff is sensitive to temps,  but can't imagine anything slowing down
*that* much.



 MR> This happens accidentally for example if one forgets to turn off a
 MR> DMM and the battery dies overnight, in the morning the LCD will be
 MR> stained. Some of the stain goes away but some of it remains.

The one I have,  when the battery dies the display looks the same as it
does when it's off.  FWIW,  it takes a "9v" battery,  and I've
found that the lithium batteries last a *REAL* long time in there.  The one
that's in it now has been in there at least 4-5 years!

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