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echo: tech
to: Roy J. Tellason
from: Tom Walker
date: 2004-12-11 09:57:14
subject: dying burner?

-> Switches are funny things.  I remember years back when I was reading a book
-> that had to do with electronic musical instruments (which is pretty close to
-> the title of the book,  though he primarily talked about organs),  and how in a
-> discussion of keyswitches they author pointed out how a normal switch may have
-> a reasonable life expectance of maybe a few thousand operations,  while a
-> keyswitch may be required to operate several million times over its life. 
-> Which makes me wonder about how they expect to get away with this cheap crap
-> that they sell for computer keyboards these days,  with the clear plastic
-> "boards" and the metallic "contacts" that just
flat-out don't work after a
-> while.

The Buy/Use/Throwaway Mentality in action.
 In the old days I used to like the keyboards that used Actual Micro
Switches. As far as I know they have faded away into History.


-> I had a whole mess of scrap keyboards here,  some pc but some were from other
-> types of computers,  mainframe terminals and such.  The cheaply made ones were
-> mostly tossed,  but the ones where each key had an individual switch were set
-> aside.  And when I need to come up with some "buttons" for
a project or
-> something where I don't want to screw around with reliability,  I'll snag some
-> out of those.  Sure they'll be bigger than the little bitty buttons in most
-> remotes,  but they'll be one heck of a lot more reliable too!  :-)

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