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Computer

Hardware ComponentsTLE – COMPUTER HARDWARE SERVICIN

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!ntrodu"t!on

As an aspiring computer technician, it is veryimportant to know the diferent componentso a computer system. These are the

hardware, sotware and peopleware. Eachcomponent plays an important role, withouteach other computer systems will not workproperly.

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!ntrodu"t!on

 This presentation will tackle the diferenthardware components o the computersystem.

System Unit

Input evices

!utput evices

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S#stemun!t

"omponents

THE MAIO$ A COM

S%ST

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S#stem un!t

 The main part o a computersystem.It includes the ollowing parts" power supply mother#oard microprocessor memory module hard disk

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mot&er'oard

 The main circuit #oard o thesystem unit. It contains all thecircuits and components that run

the computer.

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CPU ( "entra)pro"ess!n* un!t

 The processor is the main $#rain%or $heart% o a computer system.It perorms all o the instructions

and calculations that are neededand manages the &ow oinormation through a computer.

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memor#

is the computer's working storagespace that holds data, instructionsor processing and processed data

(inormation)  Two types o memory"

*A+ (*andom Access +emory) *!+ (*ead!nly +emory)

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memor#

*!+ is nonvolatile, meaning it holdsdata even when the power is !- or!.

*A+ (also called primary storage) isvolatile, meaning it holds data onlywhen the power is on. /hen thepower is of, *A+'s contents are lost.

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E+pans!on 'us

A #us is a data pathway #etweenseveral hardware componentsinside or outside a computer. It

links the computer with otherimportant hardware.

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adapters

0rintedcircuit #oards (also calledinterace cards) that ena#le thecomputer to use a peripheral.

 They are oten used to permitupgrading to a new diferenthardware.

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Power supp)#

Installed in the #ack corner o the01 case, ne2t to the mother#oard.It provides electrical power to the

computer and converts A1 into1 that are used #y othercomponents in the 01.

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HDD ( Hard d!s, dr!-e

 The hard drive is a magnetic storage device installed in thecomputer. It is used as permanentstorage or data. In a /indowscomputer, the hard drive is usuallycon3gured as the 1" drive andcontains the operating system andapplications.

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Opt!"a) dr!-e

An optical drive is a device thatuses lasers to read and write dataon the optical media. The optical

drive is used with the ollowing" 1 (1ompact isc) 4 (igital 4ersatile isc)

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Input

de-!"es

DEVICESACCEPT

ANINSTRUC

$ROM TH

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,e#'oard

0rimary input device that ena#lesusers to enter commands intocomputers5 arrangement o keys

is modelledater the typewriter key#oard.

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mouse

 The mouse is a pointing deviceused to move a cursor around thescreen. The #uttons on a mouse

are used to interact with whateveris #eing pointed at.

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Tou"& s"reen

A display screen that is sensitive tothe touch o a 3nger or stylus. Usedin a myriad o applications, includingAT+ machines, retail pointosale

terminals, car navigation andindustrial controls. The touch screen#ecame wildly popular or smartphones and ta#lets.

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L!*&t pen

A lightsensitive stylus wired to avideo terminal used to drawpictures or select menu options.

 The user #rings the pen to thedesired point on screen andpresses the pen #utton to makecontact.

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D!*!t!.er Ta')et

A graphics drawing ta#let used orsketching new images or tracingold ones. Also called a 6graphicsta#let,6 the user contacts thesurace o the device with a wiredor wireless pen or puck.

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s"anner

A device that can read8detect te2tor illustrations printed on paperand translates the inormationinto a orm the computer can use.

E2amples" image scanner and#ar code reader

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Vo!"e(!nput de-!"es

Audio input devices also known asspeech or voice recognition systems allow a user to sendaudio signals to a computer orprocessing, recording, or carryingout commands.

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Output

de-!"es

DEVICESDISP

RESULTSTHE COMHAS PRO

THE INPUTHAT HA

ENTE

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mon!tor

It displays inormation in visualorm, using te2t and graphics.

 This is the main output devicethat resem#les somewhat like atelevision.

 Types" 1*T, 91, 9E

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pro0e"tor

Shows the visual display o thecomputer onto a larger area suchas a pro:ection screen. Useul orpresentations with a largeaudience.

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Smart 'oard

A type o display screen that hasa touch sensitive transparentpanel covering the screen, whichis similar to a touch screen.

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pr!nter

A peripheral device that producesa hard copy rom data stored in acomputer #y printing te2t orillustrations on paper. Types"

ink:et printers laser printers thermal printers

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spea,er

Used to play sounds. Speakersallow you to listen to music andhear sound efects rom yourcomputer.

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Computer

Hardware ComponentsEND O$ PRESENTATION