Input and output peripherals

Input and output peripherals

 

Input and output devices are typically housed externally to the main computer chassis. The following are either standard or very common to many computer systems.

                                            

                                       Wheel Mouse

Input device

• Pointing devices
• Mouse - a pointing device that detects two dimensional motion relative to its supporting surface.
• Optical Mouse - uses light to determine mouse motion.

• Text input devices 
• Keyboard - a device to input text and characters by depressing buttons (referred to as keys or buttons).

Trackball - a pointing device consisting of an exposed protruding ball housed in a socket that detects rotation about two axes.

• Touch screen - senses the user pressing directly on the display

• Gaming devices

• Joystick - a control device that consists of a handheld stick that pivots around one end, to detect angles in two or three dimensions.

• Game pad - a hand held game controller that relies on the digits (especially thumbs) to provide input.

• Game controller - a specific type of controller specialized for certain gaming purposes.
• Image, Video input devices 





• Image scanner - a device that provides input by analyzing images, printed text, handwriting, or an object.
• Web cam - a video camera used to provide visual input that can be easily transferred over the internet.
• Audio input devices
• Microphone - an acoustic sensor that provides input by converting sound into electrical signals.
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