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About computer mouse

Discussion in 'Electronic Equipment' started by [email protected], Feb 21, 2005.

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  1. Guest

    Many of you may have opened a computer mouse and have seen two slotted
    wheels which rotates in one or another direction depending on how you
    move the mouse.. (I am talking about an ordinary rolling ball mouse)
    I was wondering how the bidirectional motion of these wheels are
    detected by only one pair of sensors for each wheel.Or are there two
    sensors embedded in one single module ? so that IR to one of the
    sensors is cut first depending on which direction the wheel rotates ..
     
  2. Robert Baer

    Robert Baer Guest

    One LED, shines thru slotted wheel to dual sensor; offset gives timing
    difference to allow determination of direction.
     
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