Agenda Last class: Keyboard Layout Today: Unit-1 Topic-2 –Computer hardware components

The Computer What it does: –Input –Process –Storage –Output –Communication

Desktop or Laptop?

Desktop or Laptop? Big, cannot move More cables Lower cost Easy to upgrade High performance (multimedia) Small, mobile (battery) Less cables Higher cost Hard to upgrade High convenience (Internet)

Monitor Computer screen to display (output) information 2 cables –One for power –One goes to the computer

Monitor Computer screen to display (output) info Buttons –Horizontal / Vertical Alignment Move left / right, up / down –Brightness How dark –Contrast Difference in darkness –Resolution How many pixels make up the screen

Contrast and Brightness

Set brightness first –If the blacks look the same – too low –If the whites look all the same or blacks look like gray – too high Set contrast –If the whites look the same – too low

CRT or LCD? CRT = Cathode Ray TubeLCD = Liquid Crystal Display

CRT or LCD? CRT = Cathode Ray Tube –Big, heavy –High refresh rate (can show fast changing screens) –Uses more energy (gets hot) –No development LCD = Liquid Crystal Display –Flat, light –Blurry images if moving too fast –Uses less energy –New models & products still coming out

Mouse Input device –2 buttons and a wheel –Left / Right click (can flip if left handed) –Double left/right click –Click and drag –Roll the wheel up / down Customize in Control Panel

Types of Mouse Mouse ball – has a ball inside that rolls when you slide the mouse around (old) Optical – uses light to detect which way you move the mouse Wireless – no cord to plug into the computer

Keyboard Input device QWERTY, 104 key is standard –From typewriters – reduce jamming Other keyboards have been made for special uses –Dvorak

Keyboard Input device QWERTY, 104 key is standard –From typewriters – reduce jamming Other keyboards have been made for special uses –Dvorak – put common letters closer –Language or business specific –Laptops – smaller, no number pad

QWERTY Keyboard Esc = EscapeF = Function keys Print Screen = take picture of the screen Scroll Lock / Pause Break – never use

QWERTY Keyboard Insert – use to overwrite text (don’t use) Home / End – go to start / end of page Page Up / Down – go 1 page up / down Delete = erase text to the right Backspace = erase text to the left

QWERTY Keyboard Arrow keysLeft / right / up / down Number Pad – for calculator, numbers Num Lock -Turn on for only numbers -Turn off to use arrows, Home, End, PgUp

QWERTY Keyboard CAPS LOCK – ALL CAPITAL LETTERS Alt = ALTernate – go to menu Ctrl = Control – shortcuts Windows key – start menu Menu key – right click

Other keys Ctrl – Alt – Del = reset, task manager Alt-Tab = switch windows Windows-D = go to desktop Lab 1 will be about using the keyboard.

Peripherals Peripherals (“outside” things that can be added) –Speakers –Printer / Scanner –Projector Cables and Adaptors –Some devices need an adaptor to plug in

Storage Devices Portable memory devices to save files Floppy disk – kB (~ ) CD (Compact Disk) – MB (~ ) DVD (Digital Video Disk) –5-10 GB (2000) USB Flash Drive –1-100’s GB (~2006)

What is INSIDE? ?

Motherboard – a circuit that connects all the important parts together –CPU (Central Processing Unit) or microprocessor The “brain” that does all the thinking and processing

What is INSIDE? Motherboard – a circuit that connects all the important parts together –CPU (Central Processing Unit) or microprocessor The “brain” that does all the thinking and processing –Memory – storage ROM = Read only memory – never changes RAM = Random Access Memory – changes on reset

What is INSIDE? Motherboard – a circuit that connects all the important parts together –CPU (Central Processing Unit) or microprocessor –Memory – storage –Ports or sockets Place to plug in stuff –Video card, sound card, more memory, hard drive

Ports / Sockets Mouse Keyboard Network Cable USB ports Monitor Microphone Speaker Printer Power Cable

What is INSIDE? Motherboard – a circuit that connects all the important parts together –Power Supply (it uses electricity) –Fan (it gets hot) –Video / graphics card –Sound card / speaker –Network card –Clock

Computer Brands (Manufacturers) HP, Apple, IBM, Dell (USA) Fujitsu, Toshiba, Hitachi, Panasonic, Sony (Japan) Samsung, LG (Korea) Lenovo, Acer (China) CPU’s: Intel, AMD (Most companies are international now)

Computer Development Computers are getting –Smaller, Cheaper –Faster with more memory –More multimedia, interactive Because of –Competition between companies –Money put into research and development –Public demand for better technology

Journal Reminder Describe the hardware and software parts in your home computer.

Expectations Know input, output devices Know flow of information in computer systems. Know examples of different input output devices Know computer peripherals Know what is inside computer Know names of computer ports

Search online and write 2 points about each Know input, output devices Know flow of information in computer systems. Know examples of different input output devices Know computer peripherals Know what is inside computer Know names of computer ports

Make alphabetical name group and make one question about each Unit-1 Topic -2 Know input, output devices Know flow of information in computer systems. Know examples of different input output devices Know computer peripherals Know what is inside computer Know names of computer ports

Quiz Unit-1 Topic -2 Know input, output devices Know flow of information in computer systems. Know examples of different input output devices Know computer peripherals Know what is inside computer Know names of computer ports

Quiz Unit-1 Topic -2 Know input, output devices Know flow of information in computer systems. Know examples of different input output devices Know computer peripherals Know what is inside computer Know names of computer ports

Hardware Quiz Small piece of paper No talking / copying others = 0 marks

Journal Writing 1.Write 4 examples of peripheral hardware (outside the computer). 2.In 1-4, is the hardware for input, output, storage, …? 3.Write 4 things inside the computer console.

Hardware Quiz: Which key(s) did I push? 9.___ 10.___ 11.___ 12.____