COMPUTER MOUSE???????????/?

why does each wheel have a series of holes cut through their rims?

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  • 1 decade ago
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    there is an ir (infrared led) on one side of the mouse wheel that is pointed to a photo sensitive diode on the other side, when you move/scroll the mouse this creates an interruption in that laser and the mouse recognises this and sends a signal to the computer.

    look at http://en.wikipedia.org/wiki/Mouse_(computing) a third of the way down

    you've been taking apart an old mechanical mouse, optical ones work a little different described in the article I just listed.

    Source(s): took one apart a while ago and wondered how they worked too
  • 1 decade ago

    They don't all do (I have a wireless mouse that doesn't) but it is done to improve traction with your finger. Theory is a slick surface can slip more depending on the material the wheel is made of.

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