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???
03/04/06 07:49
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 		 #111222 - RFID and RF transpoders
Responding to: ???'s previous message
RFID is limited to the legal power of the RFID reader.

at 900MHz the typical max power is 4watts EIRP which equates to 7metres in IDEAL conditions.

For transpoder RF chips you might try www.integration.com

It both cases... you can implment anti-collison protocols,

JG


List of 34 messages in thread
TopicAuthorDate
CHEAP, SIMPLE local RF link?            01/01/70 00:00      
   Details?            01/01/70 00:00      
      more detail            01/01/70 00:00      
         go for optical            01/01/70 00:00      
            really            01/01/70 00:00      
               that might be appealing ... IF ...            01/01/70 00:00      
                  there is a design            01/01/70 00:00      
                     that's probably too big ...            01/01/70 00:00      
            Optical doesn't look promising ...            01/01/70 00:00      
               neither RFID            01/01/70 00:00      
                  What???            01/01/70 00:00      
                     sure, but            01/01/70 00:00      
                        It seems so ... I wondered about that ..            01/01/70 00:00      
         Zig-Bee            01/01/70 00:00      
            I've got no idea ...            01/01/70 00:00      
               The Passive stuff is short range            01/01/70 00:00      
                  too bad            01/01/70 00:00      
                     RFID and RF transpoders            01/01/70 00:00      
                        a mite costly, but ...            01/01/70 00:00      
                           Integration            01/01/70 00:00      
                              uC in reader only, not the tag            01/01/70 00:00      
                                 I'm going to have an MCU for sure            01/01/70 00:00      
   try            01/01/70 00:00      
   thanks for the links ...            01/01/70 00:00      
   How about Micrel?            01/01/70 00:00      
      I'll have a look            01/01/70 00:00      
      isn't there a 'nordic"?            01/01/70 00:00      
         interesting variant            01/01/70 00:00      
            sometimes, Richard, you have to do the w            01/01/70 00:00      
               It's a good possibility ...            01/01/70 00:00      
                  Nordic            01/01/70 00:00      
   for some reason            01/01/70 00:00      
      Chipcon modules            01/01/70 00:00      
         That looks like the right sort of thing            01/01/70 00:00      

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