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 – 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 System The 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 System The Memory / Storage Devices

For a computer to work, it needs to remember 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 System Input Devices

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

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 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 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

Wired and wireless computer parts 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

Wired and wireless computer parts 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)

1.10 Q&A Inkjet Laser Dot matrix

1.10 Q&A 1. 2. 3. 4. 5. 6. 7 8. 9.

1.10 Q&A

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