Explain the uses of thumbwheels, Computer Engineering

Explain the uses of thumbwheels

Two thumbwheels are usually required to control the screen cursor in its horizontal and vertical position respectively.

As the name implies, a trackball is a ball that can be rotated with the fingers or palm of the hand to produce screen-cursor movement. Potentiometers, attached to the ball, are used to measure the direction and amount of rotation. Trackballs are often mounted on keyboards or other devices such as the Z mouse as explained earlier.

 

Posted Date: 9/3/2013 7:10:34 AM | Location : United States







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