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???
05/11/10 07:01
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 		 #175805 - a glass plate.
Responding to: ???'s previous message
For glass screen plate, the touch sense principles are same as Michael shown.
http://www.8052.com/forum/read/175802

But for this configuration, transparent electrodes (ITO) is used instead of metal one.
This electrodes are common for LCD.
And thin glass layer covers over the electrodes, instead of polymer film.

Tsuneo

List of 24 messages in thread
TopicAuthorDate
Capacitive touch sensor through glass            01/01/70 00:00      
   Research shows these sites for Touch Sense            01/01/70 00:00      
   a glass plate.            01/01/70 00:00      
      I do not know your app, but ...            01/01/70 00:00      
         Resistive sometimes an option            01/01/70 00:00      
         Agreed, mostly            01/01/70 00:00      
            Apple...            01/01/70 00:00      
            all very well ...            01/01/70 00:00      
               3-input olfactory sensor?            01/01/70 00:00      
                  sensitive nose... smelling ha ha ha            01/01/70 00:00      
                     yes, don't            01/01/70 00:00      
                        Risking life & limb?            01/01/70 00:00      
                           not touching the panel, but            01/01/70 00:00      
                              Batteries or isolated PSU recommended for debug            01/01/70 00:00      
                                 I get every thing but the suggestion to my original need            01/01/70 00:00      
                                    I gave you the best recommendation that I could...            01/01/70 00:00      
                                       Have you looked at proximity sensors or metal detectors yet?            01/01/70 00:00      
                                    Basic principles            01/01/70 00:00      
                                       Touch Sense Patents            01/01/70 00:00      
   Highly critical!            01/01/70 00:00      
      very enlightening            01/01/70 00:00      
   Previously, on 8052.com...            01/01/70 00:00      
      implementing touch screen buttons in nxp 89lpc922 chip            01/01/70 00:00      
         Can use discrete logic too            01/01/70 00:00      

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