[10.0] I/O Devices and Concepts

This is the data and instructions entered into the memory of a computer.

Ex. keyboard, pointing devices, touch screens, pen input, motion input, voice input, video input, scanners

This input devices contains keys you press to enter data and instructions into a computer or mobile device.

Modern keyboard devices translate _____________

• digital signals into physical key presses
• audio signals into visual displays
• light signals into tactile feedback
• keystrokes into electric signals

This keyboard has a thin rubber/silicon layer with individual domes per key that collapse when pressed. Though it is quiet and low-cost, you have to press it fully to register.

• dome switch keyboard

• mechanical keyboard

• ergonomic keyboard

This keyboard individual switches per key. While it is expensive, it can register even if pressed halfway

• dome switch keyboard

• mechanical keyboard

• ergonomic keyboard

This keyboard reduces the chance of repetitive strain injuries of wrist and hand (providing comfort, safety, and efficiency)

• dome switch keyboard

• mechanical keyboard

• ergonomic keyboard

These input devices translate spacial position of a pointer into numeric values in a system of 2D coordinates

This mouse uses a roller ball to move wheels which specify movement along the X and Y axis

• Mechanical

• Optical

• Trackballs

• Touchpad

This mouse uses an optical scanner that scans the surface under the mouse. The microprocessor in the mouse compares many scans per second to determine the direction and speed of movement.

• Mechanical

• Optical

• Trackballs

• Touchpad

A pointing device that consists of a ball held by a socket containing sensors to detect the rotation of a ball. Its like an upside down mechanical mouse.

• Mechanical

• Optical

• Trackballs

• Touchpad