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Chapter05 - Discovering Computers 2009 Chapter 5 Input...

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Discovering Computers 2009 Chapter 5 Input
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Chapter 5 Objectives Define input List the characteristics of a keyboard Describe different mouse types and how they work Summarize how various pointing devices and controllers for gaming and media players work Explain how voice recognition works Describe various input devices for smart phones, PDAs, and Tablet PCs Explain how a digital camera works Describe uses of Web cams and video conferencing Discuss various scanners and reading devices and how they work Explain the types of terminals Summarize the various biometric devices Identify alternative input devices for physically challenged users Next
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What Is Input? What is input ? p. 234 - 236 Fig. 5-1 Next Ø Input device is any hardware component that allows users to enter data and instructions Ø Data or instructions entered into memory of computer
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What Is Input? What are the two types of input? p. 234 Next § Unprocessed text, numbers, images, audio, and video Ø Instructions § Programs § Commands § User responses Ø Data
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The Keyboard How is the keyboard divided? p. 236 Fig. 5-2 Next Ø Typing area Ø Numeric keypad Ø Function keys, special keys that issue commands
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The Keyboard What is the insertion point ? p. 237 Fig. 5-3 Next Ø Blinking vertical bar that indicates where the next character you type will be displayed
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The Keyboard How are keyboards attached? p. 238 Fig. 5-4 Next Ø Desktop computer keyboards often attach via a cable Ø Wireless keyboards communicate with a receiver attached to a port on the system unit Ø Keyboards often are built into mobile devices
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Pointing Devices What is a mouse ? p. 239 Fig. 5-5 and 5-6 Next Ø Pointing device that fits under palm of hand § Pointing device controls movement of pointer Ø Mechanical mouse Ø Optical mouse Ø Laser mouse Ø Air mouse Ø Wireless mouse Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Air Mouse below Chapter 5
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Tilt wheel Press wheel butto n Free- spin wheel Right - drag Tripl e- click Doub le- click Right - click Pointing Devices What are common mouse operations? p. 240 Fig. 5-7 Next Point Click Drag Rotat e wheel
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Other Pointing Devices What is a trackball ? p. 241 Fig. 5-8 Next Ø Stationary pointing device with a ball on its top or side Ø To move pointer, rotate ball with thumb, fingers, or palm of hand Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Repetitive Strain Injuries below Chapter 5
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Other Pointing Devices What are a touchpad and a pointing stick ? p. 241 - 242 Figs. 5-9— 5-10 Next Ø Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion Ø Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard
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Other Pointing Devices What is a light pen ?
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