1.6 Inside the system unit [Hardware]

Function of the Computer PartsFunction of the Computer Parts

C O B : C O M P U T E R B A S I C S

COB 1 Part 6

1.6 Inside the system unit [Hardware]

Class: ________________

Name: ________________



COB 1 Part 6

1.

2.

3. 5.

6

7.

8.

9.10.

System unit4.

1.6 Computer System



COB 1 Part 6

1.6 Computer System



COB 1 Part 6

1.6 Inside the system unit



COB 1 Part 6

1.

2.

3.

4.

5.

6.

7.

8.

9.

1.6 Inside the system unit



COB 1 Part 6

1.7 Function of Parts of a Computer System(Hardware)

• A computer is made up of different parts• Each part performs different function or

operation

2.

3.4.

Process data1.



COB 1 Part 6

1.7 Function of Parts of a Computer System(Hardware)

• A computer is made up of different parts• Each part performs different function or

operation

Process data



COB 1 Part 6

• The casing of the system unitsystem unit (Cont’d)

• Comes in a variety of design

1.7 Function of Parts of a Computer System(Hardware – system unit)

system unitsystem unit



COB 1 Part 6

• The casing of the system unit (Cont’d)

• Comes in a variety of design

1.7 Function of Parts of a Computer System(Hardware – system unit)

system unitsystem unit



COB 1 Part 6

• All processing takes place in the system unit.

• The system unit contains

• the motherboard

1.7 Function of Parts of a Computer System(Hardware – motherboard)



COB 1 Part 6

A motherboard is the central printed circuit board (PCB) that holds many of the crucial components of the system, such as the CPU, memory, graphics adapter and sound card while providing connectors for other peripherals such as printers, scanners, hard disks, microphones, web cams, and digital cameras.

1.7 Function of Parts of a Computer System(Hardware - motherboard)

the motherboard



COB 1 Part 6

1.7 Function of Parts of a Computer System

The BRAIN



COB 1 Part 6

• the processor, Central Processing Unit (CPU), also called processor

– It is the brainbrain of the computer

– It processes data and instructions

– It takes instructions and executes them

– It coordinates and controls flow of data between different parts of the computer

1.7 Function of Parts of a Computer System(Hardware - CPU)



COB 1 Part 6


The Memory / Storage Devices



COB 1 Part 6

•For a computer to work, it needs to remember

– Instructions for the computer’s hardware (programs)

– User’s information/ data

1.7 Function of Parts of a Computer System(Hardware – Memory/ Storage)



COB 1 Part 6


(Hardware – Memory/ Storage)System Unit contains the Primary

memory and some secondary memory:

• Primary storage / memory• Read Only Memory (“ROM”)

• Stores data permanently• Random Access Memory

(“RAM”)• Stores data temporarily

• Secondary Storage/ Storage• Hard disk



COB 1 Part 6




COB 1 Part 6

– Primary memory• Stores data currently or frequently

used


Primary Memory



COB 1 Part 6


Primary Memory



COB 1 Part 6

– Secondary storage media• Stores data and programs permanently• Able to store large amount of data




COB 1 Part 6




COB 1 Part 6


Input Devices



COB 1 Part 6

1.7 Function of Parts of a Computer System – Input Devices

• All these are input devices

• Scanner• Scans information

on hard copy into the computer

• Microphone• Captures sound into

the computer

Input DevicesInput Devices



COB 1 Part 6

• The keyboard and mouse• Important tools because they are

used to control the computer• Designs have improved greatly

1.7 Function of Parts of a Computer System – Input Devices




COB 1 Part 6

• Used to input data to the computer by typing. • It is used to type words or numbers into the computer

system.

Inputs data corresponding to the key being pressed

1.7 Function of Parts of a Computer System – 1.7 Function of Parts of a Computer System – Input DevicesInput Devices



COB 1 Part 6

• Used to input data to the computer by clicking

• It is a pointing device that directs a pointer on the monitor.




COB 1 Part 6

•Input sound/ audio into the computer system

microphone




COB 1 Part 6

•Reads or scans information into the computer. •The information can be text or graphics. •It is usually to scan photographs




COB 1 Part 6

• The unit that plugs into a game console to control the game play.

• Commonly used in computer games.


Game console controller.



COB 1 Part 6

• Barcode reader:- reads information on a barcode. Commonly used in libraries and supermarkets

1.7 Function of Parts of a Computer System 1.7 Function of Parts of a Computer System – –


Barcode reader



COB 1 Part 6

•Reads marks made on specially printed forms and inputs into computer




COB 1 Part 6




COB 1 Part 6

1.7 Function of Parts of a Computer System(Output Devices)



COB 1 Part 6

• All these are output devices• Monitor

• Like a television screen• Displays information from the

data inputted• Printers

• Display information on paper• Hard copy

• Some prints in colour; others print in black only

• Speakers• Produces sound and music

generated by the computer

1.7 Function of Parts of a Computer System – 1.7 Function of Parts of a Computer System – Output DevicesOutput Devices



COB 1 Part 6

• The display unit• Displays information onto a screen• Main way computer communicates with users




COB 1 Part 6

• The display unit• Many types invented over the years




COB 1 Part 6


• The display unit• Many types invented over the years



COB 1 Part 6

• Printers: Sends information produced by the computer system in a printed form.

• Prints text or illustrations onto paper • There are different types of printers.

• Main types: • Thermal printer• Print created by pushing

heated pins against heat sensitive paper

• Cheap and fast• Used widely in

supermarket checkouts and ATM




COB 1 Part 6

• Printers (Cont’d)

• Inkjet printer• Print created by

spraying dots of ink onto paper

• High quality text and graphics

• Slow• Cost of printer low but

cost of ink is high




COB 1 Part 6

• Printers (Cont’d)• Laser printer

• Print created by• Applying ink powder (toner)

to drum• Toner on drum is then

heated and applied to paper• Very high quality text and

graphics• Fast• Expensive• Toner is sold in cartridges

• Expensive but can print more pages than an inkjet printer




COB 1 Part 6




COB 1 Part 6





COB 1 Part 6




COB 1 Part 6

1.7 Function of Parts of a Computer System(Other Devices)



COB 1 Part 6

1.7 Function of Parts of a Computer System – 1.7 Function of Parts of a Computer System – Input/ Output Devices

Touch screen:- input information by touching the screen. Commonly used in PDA, hand phones, bus terminals, tourist kiosks, and shopping centers.

PDA

Touch ScreenGPS



COB 1 Part 6

• Data logger• An electronic instrument that has a microprocessor, data

storage and a sensor• Used to record measurements such as temperature• A computer is used to display the measurements

1.7 Function of Parts of a Computer System – 1.7 Function of Parts of a Computer System – Input Devices – Data logger



COB 1 Part 6

1.7 Function of Parts of a Computer System – 1.7 Function of Parts of a Computer System – Input/ Output Devices


• Multifunctional printers• Multiple functions

• Printing, scanning, copying and faxing

• Convenient• Disadvantages

• Over-using one function may interfere with other functions

• More likely to break down due to the many functions



COB 1 Part 6

1.8 Cables

• Wired and wireless computer parts• Computer parts classified into wired and

wireless ones• Wired computer parts

• Physically connected by wires or cables• Connected to attachments called ports



COB 1 Part 6

1.9 Network

• Wired and wireless computer parts• Wireless computer parts

• No physical connection• Example: wireless

router, cordless mouse



COB 1 Part 6

1. Keyboard, mouse, flat-bed scanner, microphone 2. Monitor, speaker, laser printer, inkjet printer (Other

answers: projector)3. CD-ROM drive, hard disk (Other answers: thumb

drive)

1.10 Q&A



COB 1 Part 6

1.10 Q&A

1. Inkjet2. Laser3. Dot matrix4. Laser



COB 1 Part 6

1.2.3.4.5.

6.78.9.

1.10 Q&A



COB 1 Part 6

1.10 Q&A



COB 1 Part 6

End of Part 7

To return to the lessonhttp://cpa-yyss.wikispaces.com/Computer+System

Or use the Back button.

Documents

1.6 Inside the system unit [Hardware]