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???
02/29/08 14:31
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#151669 - it does NOT work
Responding to: ???'s previous message
One way to do this is to let the other output cause an interrupt. The other output is then sampled being low/high. It will indicate the direction.

I fell in that trap some years ago and then (now lost) did draw uou all 16? possible states at a direction change.

You WILL get an error of 1 in (if i recall 2 of 16 cases.

Erik

List of 18 messages in thread
TopicAuthorDate
Quadrature Encoder interfacing            01/01/70 00:00      
   Use interrupt            01/01/70 00:00      
      it does NOT work            01/01/70 00:00      
   'differential' is more than obe thing            01/01/70 00:00      
      Why does clock/direction fail ?            01/01/70 00:00      
      I got it .....            01/01/70 00:00      
         a quadrature detector ....            01/01/70 00:00      
      Possibly differential            01/01/70 00:00      
         if so, then datasheet would be needed or            01/01/70 00:00      
      Datametrics            01/01/70 00:00      
         need that scope picture (description)            01/01/70 00:00      
            Decoder timing diagram            01/01/70 00:00      
               Scope Waveforms            01/01/70 00:00      
                  485 will be fine, I suggest LT1785            01/01/70 00:00      
                     My original question            01/01/70 00:00      
                        Encoders With Differential Outputs            01/01/70 00:00      
   IC Chip Decoder Solutions            01/01/70 00:00      
      Project details            01/01/70 00:00      

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