[time-nuts] LED reliability
Hal Murray
hmurray at megapathdsl.net
Wed Apr 30 16:56:55 UTC 2008
> LEDs been viable since at least the early 70's? Talk about planned
> obsolescence...
How reliable were the early LEDs? When did they start to get used in high
reliability applications?
I remember getting a rack of memory for a PDP-10 that used LEDs because the
normal lights burned out all the time. That was back in the early 80s when
real computers had lots of lights. I think LEDs were pretty new then. (at
least new to me)
The best reliability story I heard (many years ago) was about installing
another trans-Atlantic telephone cable. They used tubes long after
transistors were out. They knew how long the tubes would last. They didn't
have much data on transistors yet.
--
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