1.6 Inside the system unit [Hardware]

1.6 Inside the system unit [Hardware] Class: ________________ Name: ________________

1.6 Computer System System unit 4. 3. 5. 6 2. 7. 1. 8. 10. 9.

1.6 Computer System

1.6 Inside the system unit

1.6 Inside the system unit 1. 5. 2. 6. 7. 3. 8. 4. 9.

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 1. 2. 3. 4.

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

1.7 Function of Parts of a Computer System(Hardware – system unit) • The casing of the system unit (Cont’d) • Comes in a variety of design system unit

1.7 Function of Parts of a Computer System(Hardware – motherboard) • 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) • the motherboard • 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 SystemThe BRAIN

1.7 Function of Parts of a Computer System(Hardware - CPU) • the processor,Central Processing Unit (CPU), also called processor • It is the brain 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 SystemThe Memory / Storage Devices

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

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

1.7 Function of Parts of a Computer System(Hardware – Memory/ Storage) • Primary memory • Stores data currently or frequently used Primary Memory

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

1.7 Function of Parts of a Computer System(Hardware – Memory/ Storage) • Secondary storage media • Stores data and programs permanently • Able to store large amount of data

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

1.7 Function of Parts of a Computer SystemInput Devices

1.7 Function of Parts of a Computer System – Input Devices Input Devices • All these are input devices • Scanner • Scans information on hard copy into the computer • Microphone • Captures sound into the computer

1.7 Function of Parts of a Computer System – Input Devices • The keyboard and mouse • Important tools because they are used to control the computer • Designs have improved greatly Input Devices

1.7 Function of Parts of a Computer System – Input Devices • 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 – Input Devices • Used to input data to the computer by clicking • It is a pointing device that directs a pointer on the monitor.

1.7 Function of Parts of a Computer System – Input Devices • Input sound/ audio into the computer system microphone

1.7 Function of Parts of a Computer System – Input Devices • Reads or scans information into the computer. • The information can be text or graphics. • It is usually to scan photographs

1.7 Function of Parts of a Computer System – Input Devices • The unit that plugs into a game console to control the game play. • Commonly used in computer games. Game console controller.

1.7 Function of Parts of a Computer System – Input Devices • Barcode reader:- reads information on a barcode. Commonly used in libraries and supermarkets Barcode reader

1.7 Function of Parts of a Computer System – Input Devices • Reads marks made on specially printed forms and inputs into computer

1.7 Function of Parts of a Computer System – Input Devices

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

1.7 Function of Parts of a Computer System – Output Devices • 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 – Output Devices • The display unit • Displays information onto a screen • Main way computer communicates with users

1.7 Function of Parts of a Computer System – Output Devices • The display unit • Many types invented over the years

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

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

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

1.7 Function of Parts of a Computer System – Output Devices

1.7 Function of Parts of a Computer System – Output Devices • Printers (Cont’d)

1.7 Function of Parts of a Computer System – Output Devices

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

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 Screen GPS

1.7 Function of Parts of a Computer System – Input Devices – Data logger • 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 – Input/ Output Devices • Printers (Cont’d) • 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

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

1.9 Network • Wired and wireless computer parts • Wireless computer parts • No physical connection • Example: wireless router, cordless mouse

1.10 Q&A • Keyboard, mouse, flat-bed scanner, microphone • Monitor, speaker, laser printer, inkjet printer (Other answers: projector) • CD-ROM drive, hard disk (Other answers: thumb drive)

1.6 Inside the system unit [Hardware]