Rotary encoder direction

Discussion in 'The Projects Forum' started by Konstabel, Apr 25, 2008.

  1. Konstabel

    Thread Starter Active Member

    Jan 31, 2008
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    Can any body tell me how to determine the direction of rotation of a rotary encoder using logic gates only?

    Basically how do I determine which of the A and B signals comes first?

    Thanks
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    That kinda depends on the rotary encoder, doesn´t it?
     
  3. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    230
    Google: quadrature decoder circuit

    Ken
     
  4. kinkyknob

    New Member

    Apr 25, 2008
    5
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    i think it is left. or clockwise.
     
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    All that is required to decode a quadrature encoder is a D-type flip-flop.

    hgmjr
     
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