Input Devices, Continued
Pressure
sensitive or
electronic
tablets
Light pens
Microphones
Pressure sensitive and electronic tablets are primarily freehand drawing
devices. Sensitive to pressure from the hand, the tablet recreates the thick
and thin strokes made on the tablet to the screen.
Figure 3-4 shows a pressure sensitive or electronic tablet.
Figure 3-4. —A pressure sensitive or electronic tablet.
Light pens are similar to ball-point pens; however, the drawing surface is the
screen itself. The light pen activates the photoelectric circuits of the screen
to produce an image.
Microphones prompt voice activated computers to perform specific functions.
The computer recognizes a voice pattern and responds by following the
command. Similarly, musical instruments can be fed through a computer to
create electronically enhanced recordings.
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