Chapter 3A - Using the keyboard and mouse. This lesson introduces you to the keyboard and the mouse. You will learn the importance of these devices, the way the computer accepts input from them, and the many tasks they enable you to perform on your PC. | McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 3A Using the Keyboard And Mouse The Keyboard The most common input device Must be proficient with keyboard Skill is called keyboarding 3A- The Keyboard How keyboard works Keyboard controller detects a key press Controller sends a code to the CPU Code represents the key pressed Controller notifies the operating system Operating system responds Controller repeats the letter if held 3A- Teaching tip Table presents the ASCII code. An exercise that never fails to amuse students is to use the Alt and the number pad to enter letters into an application. As before, open MS Word. Have students hold down the Alt key and type an ASCII value into the number pad. Once they release the Alt, the letter appears. This is a useful skill when the keyboard breaks. Challenge the students to explore numbers above 128. The Mouse All modern computers have a variant Allows users to select objects Pointer moved by the mouse Mechanical mouse Rubber ball determines direction and speed The ball often requires cleaning 3A- The Mouse Optical mouse Light shown onto mouse pad Reflection determines speed and direction Requires little maintenance 3A- The Mouse Interacting with a mouse Actions involve pointing to an object Clicking selects the object Clicking and holding drags the object Releasing an object is a drop Right clicking activates the shortcut menu Modern mice include a scroll wheel 3A- Insider information Douglas Englebart patented the first mouse in 1970 as the “X-Y position indicator for a display system.” The name mouse comes from the tail on the device. The Mouse Benefits Pointer positioning is fast Menu interaction is easy Users can draw electronically 3A- The Mouse Mouse button configuration Configured for a right-handed user Can be reconfigured Between 1 and 6 buttons Extra buttons are configurable 3A- Variants of the Mouse Trackballs . | McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 3A Using the Keyboard And Mouse The Keyboard The most common input device Must be proficient with keyboard Skill is called keyboarding 3A- The Keyboard How keyboard works Keyboard controller detects a key press Controller sends a code to the CPU Code represents the key pressed Controller notifies the operating system Operating system responds Controller repeats the letter if held 3A- Teaching tip Table presents the ASCII code. An exercise that never fails to amuse students is to use the Alt and the number pad to enter letters into an application. As before, open MS Word. Have students hold down the Alt key and type an ASCII value into the number pad. Once they release the Alt, the letter appears. This is a useful skill when the keyboard breaks. Challenge the students to explore numbers above 128. The Mouse All modern computers have a variant Allows users to .
