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 Tube • LCD = 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 madefor special uses– Dvorak

Keyboard

• Input device

• QWERTY, 104 key is standard– From typewriters – reduce jamming

• Other keyboards have been madefor special uses– Dvorak – put common letters closer– Language or business specific– Laptops – smaller, no number pad

QWERTY Keyboard

Esc = Escape F = Function keys

Print Screen = take picture of the screen

Scroll Lock / Pause Break – never use

QWERTY KeyboardInsert – 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 KeyboardArrow keys Left / right / up / down

Number Pad – for calculator, numbers

Num Lock

- Turn on for only numbers

- Turn off to use arrows, Home, End, PgUp

QWERTY KeyboardCAPS 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

– 100-300 kB (~1980-90)

• CD (Compact Disk)– 500-900 MB (~1990-2000)

• DVD (Digital Video Disk)– 5-10 GB (2000)

• USB Flash Drive– 1-100’s GB (~2006)

What is INSIDE?

• ?

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 portsMonitor

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.____