Computers Are Your Future Twelfth Edition * Computers Are Your Future Twelfth Edition 07/16/96 Chapter 2: Input and Output Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input and Output * 07/16/96 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

* Objectives 07/16/96 Explain the various types of keyboards and the purpose of the special keys on the keyboard, identify the commonly used pointing devices, and list alternative input devices. List the types of monitors and the characteristics that determine a monitor’s quality. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

* Objectives 07/16/96 Identify the two major types of printers and indicate the advantages and disadvantages of each. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Input Data or instructions entered into a computer Input device Hardware that gives users the ability to enter data and instructions into the computer’s random access memory (RAM) Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Input device (con’t.) Keyboard Most common input device—enables data and instruction entry through the use of a variety of keys Enhanced keyboards—additional keys, such as media control buttons to adjust speaker volume, or Internet control buttons that open e-mail, a browser, or a search window with a single keystroke Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * 07/16/96 Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Key matrix Grid of circuits located under the keys Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

The blue lines are the columns and the red lines the rows. There are 16 knots that the rows and columns intersect. The columns and the rows are NOT in contact! Suppose that we want to make a key matrix. To do this, we will have to connect a button to each knot. The buttons will have a push-to-make contact. When the operator pushes this button, it will connect the column and the row that it corresponds to . Now i will put the push-to-make buttons onto the matrix Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Character map Chart that tells the processor what key has been pressed Character maps are programs with on-screen layout of symbols. You can use them to type all possible text symbols, and useful special characters, like letters foreign languages, or maths signs. For example, on the image to your right you can see what Mac's Character Palette looks like. Character maps are the best utilities for typing symbols you can find, and if you use Windows, or Mac then you already have them for sure. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Insertion point Blinking vertical line, underscore, or highlighted box Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Wireless keyboards Connect to the computer through infrared (IR), radio frequency (RF), or Bluetooth connections Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Universal Serial Bus (USB) connector Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

PS/2 cable Often referred to as the mouse port or keyboard port, the PS/2 port was developed by IBM and is used to connect a computer mouse or keyboard to an IBM compatible computer. Mouse is green, keyboard is purple. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Keyboards Connect with: Infrared Radio frequency Bluetooth Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Special keyboard keys include: Cursor movement keys (arrow keys)—set of four keys that move the cursor up, down, right, or left Toggle keys—either on or off Function keys—perform specific actions depending on the program Modifier keys—used for shortcuts Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Alternate keyboards Virtual (soft keyboard or on-screen keyboard)—a touch-sensitive screen; accepts input with a stylus or finger Smartphone Mini-keyboard—keys for each letter of the alphabet; option on many smartphones Keypad—smaller, more compact, has keys that represent multiple letters Virtual laser—used with devices as smartphones, an alternate way to do e-mail, word processing, spreadsheets Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Ex. Virtual Keyboard Ex. Mini Keyboard Ex. Keypad A keypad is a set of buttons arranged in a block or "pad“ which bear digits, symbols or alphabetical letters. Pads mostly containing numbers are called a numeric keypad.  Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Virtual Laser Keyboard Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Alternate keyboards (con’t.) Flexible keyboards—full-sized, lightweight portable devices Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Pointing device Controls an on-screen pointer’s movements Pointer On-screen symbol that signifies the command, input, or possible response Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Mouse Types Optical—most popular pointing device Travel—all the capabilities of a normal mouse, half the size Wheel—has a wheel for easy vertical scrolling Wireless—connects through an infrared or radio signal (RF). Battery operated Air—does not need to work on a surface, works as it moves through the air Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Travel Mouse Optical Mouse Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Wireless Wheel Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Air Mouse Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Input Devices: Giving Commands * Input Devices: Giving Commands 07/16/96 Mouse alternatives Trackball Pointing stick Touchpad (also called a trackpad) Click wheel Gaming Controllers Stylus Touch screen Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

Pointing Stick TRACKBALL Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Stylus Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Trackball Is a pointing device that contains a movable ball held in a cradle. The user rolls the ball to move a pointer From one to three keys can be located in various positions to perform equivalent mouse actions like a click Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Pointing Stick A pointing device that looks like a pencil eraser between the G,H and B keys Pressure sensitive and is pressed and moved in various directions with the forefinger Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Touch pads (trackpads) A small, pressure sensitive, flat surface located on the notebook Controls pointer by moving and tapping your fingers on the surface of the pad Mouse (key term) controls a mouse pointer (key term) that appears in the shape of an arrow Some mice have a wheel button (key term) for scrolling. The Optical Mouse (key term) is the most widely used Mouse types Optical mouse (Key Term) – has no moving parts Emits and senses light to detect mouse movement Can be used on any surface Cordless mouse (Key Term) or wireless mouse (Key Term) – battery powered Uses radio waves or infrared light waves Touch pads (key term) –controls the pointer by moving and tapping your fingers on the surface of a pad

Click Wheel A pad that looks like a circle that is used to move through song lists, movie lists or photos Method of navigation on the iPod Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

Gaming Controllers Provide input to computer games Joysticks use pressure and direction of the stick Gaming mice are similar to a mouse but high precision (sensitivity) Game pads use both hands Motion sensing device control games by user movement Joystick (key term)– control game actions by varying pressure, speed and direction Gaming Mouse – similar to traditional mice with higher precision, faster responsiveness, programmable buttons, and better ergonomics Game pads (key term) – held by two hands Motion sensing device (key term) – control games by user movement

Touch Screen A display screen that is sensitive to the touch of a finger or stylus Stylus is a pen-like device Used on tablets Uses handwriting recognition software Common on mobile devices Smart Mobiles ATM machines Airport kiosks Desktop monitors Multitouch screen (key term) – can be touched with more than one finger, which allows for interactions such as rotating graphical objects on the screen with your hand or zooming in and out by pinching and stretching your fingers. These screens are common on mobile devices such as the Apple iPhone, and some notebook computers and desktop monitors. Stylus works using handwriting recognition software. It is a pen-like device.