After studying this chapter you will be able to understand: Input devices (contd.), interfacing with the computer using mouse & keyboard, output devices, storage devices, understanding of Central Processing Unit (CPU), How do computers work? | Learning About Parts of Computer ADE100- Computer Literacy Lecture 02 Knowledge test What is computer? Briefly explain role of Charles Babbage. What is the purpose of input devices? What is the role of Joystick & OCR? Topics covered Input devices (contd.) Interfacing with the computer using mouse & keyboard Output devices Storage devices Understanding of Central Processing Unit (CPU) How do computers work? What is input? Any data or instructions used by a computer Types of input: Data- text form Instructions- particular commands Voice- audio signals through microphone Image- inserting a picture The Keyboard How keyboard works? Keyboard controller (a tiny chip) detects a key pressed and places a code into its memory called buffer (a temporary memory area). Controller sends a code to the CPU Code represents the key pressed Controller sends a signal to the operating system Operating system responds Controller repeats the letter if held 5 Teaching tip Table presents the ASCII code. . | Learning About Parts of Computer ADE100- Computer Literacy Lecture 02 Knowledge test What is computer? Briefly explain role of Charles Babbage. What is the purpose of input devices? What is the role of Joystick & OCR? Topics covered Input devices (contd.) Interfacing with the computer using mouse & keyboard Output devices Storage devices Understanding of Central Processing Unit (CPU) How do computers work? What is input? Any data or instructions used by a computer Types of input: Data- text form Instructions- particular commands Voice- audio signals through microphone Image- inserting a picture The Keyboard How keyboard works? Keyboard controller (a tiny chip) detects a key pressed and places a code into its memory called buffer (a temporary memory area). Controller sends a code to the CPU Code represents the key pressed Controller sends a signal to the operating system Operating system responds Controller repeats the letter if held 5 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. Lecturer Sajid Riaz Chapter 3: Interacting with Your Computer The Mouse Common mouse actions are: Right click Left click Drag & drop Move Scroll Double click 6 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. Lecturer Sajid Riaz Chapter 3: Interacting with Your Computer The Mouse Benefits Pointer positioning is fast Menu interaction is easy Users can draw electronically The Mouse Mouse button configuration Configured for a right-handed user Can be reconfigured Left mouse button is called a .
