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| overview 
           quicktime movie: 
           
 |         Interacting 
          with the physical box involves triggering one of two sensors mounted 
          to the surface of the object. Triggering the right sensor causes the 
          motor to turn clockwise while triggering the left sensor causes the 
          motor to turn counterclockwise. Triggering both sensors at the same 
          time causes the motion to stop. The electronics used for this box are 
          all analog.  
 
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| Casey 
        Reas 
        ( reas@media.mit.edu ) | |
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