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Mouses. graphics tablets, trackballs

Posted on 2000-02-23
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How do mouses, graphic tablets, trackballs work?? I would like to know how these devices are made and what the adv's and disadv's of them are!

Cheers


Melanie
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Question by:Meltz_99
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DontPanic earned 300 total points
ID: 2551352
Inside both mice and trackballs, there are two rollers that sense the horizontal and vertical movement of the ball.  This information is sent to a PS/2 or serial port on the computer, and a software driver decodes the information, and tells the operating system what the mouse is doing.
The main difference between a trackball and a mouse is user preference. (They both do the exact same thing).


I am not exactly sure about the grahic tablet, but usually they use a magnetic surface to detect the movement of the pointer. These devices are usually used when working with a complicated graphics design/presentation programs.

Mice and trackballs are more portable then a large graphic tablet, and unless the user was involved in a heavy amount of graphics design, a mouse or trackball would be best.
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Expert Comment

by:Gryphon031198
ID: 2551940
Tablets works on pressure senistive plates.  If you move the pen, the pressure you apply tells the computer where the pointer should be on the screen.

Ditto on the mouse/trackball

Gryphon
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