To all,
Can someone explain how the membrane power switch works?  My interest is purely for entertaining my curiousity.  I'm interested on the scientific principles behind it.
Thanks,
John
Hi John;
   Thanks for your recent inquiry about Bryston's membrane power 
switches.  This type of switch works as a normally-open momentary 
electrical contact. It consistes of two conductive elements 
separated by a small air-gap. Pressing on the outer membrane 
causes these conductors to come into contact. At that point there is 
a logic circuit whioch recognizes that the switch has been cycled, 
and either initiates startup or shutdown, depending on which was 
the previous command.
   I hope the above was clear, but please let me know if you have 
any other questions. Thanks again for your interest in Bryston.
Sincerely,
Chris Russell
Bryston Ltd.