[time-nuts] LED reliability

Hal Murray hmurray at megapathdsl.net
Wed Apr 30 12:56:55 EDT 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.

These are my opinions, not necessarily my employer's.  I hate spam.

More information about the time-nuts mailing list