8/12/2019 Folio 1 R Aizuddin & Akmal
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Name:
Aizuddin b. Mohd Othm an
Muhammad Akm al b. Zulk i f lee
Class:
1 Rajin
Teacher:
Pn. Ainul A iza bt. Kar im
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Content
No. Types of Peripherals Devices Page
1 Input Devices 1-6
2 Output Devices 7-8
3 Storage Devices 9-4 Reference
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Input Devices
Meaning/Funct ion:
Incomputing,an input deviceis anyperipheral(piece ofcomputer
hardwareequipment) used to provide data and control signals to
aninformation processing systemsuch as acomputeror otherinformation
appliance.Examples of input devices
includekeyboards,mouse,scanners,digital camerasandjoysticks.
1.Input Devices For Text
The input of text into a computer system is one of the most common and important
channels for humans to interact with a system. This essay provides a brief overview
of text input devices. However, literallyevery input device could be used for this task,
even one button would be sufficient, when it is used as a Morse key.
a.Keyboard
Incomputing,a keyboardis atypewriter-style device,which uses an
arrangement of buttons orkeys,to act as mechanical levers or electronic
switches. Following the decline ofpunch cardsandpaper tape,interaction
viateleprinter-style keyboards became the maininput
deviceforcomputers.
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b. Bar Code Reader
A barcode reader(or barcode scanner) is an electronic device for
reading printedbarcodes.Like aflatbed scanner,it consists of a light
source, a lens and a light sensor translating optical impulses into electrical
ones. Additionally, nearly all barcode readers contain decodercircuitry
analyzing the barcode's image data provided by the sensor and sending
the barcode's content to the scanner's output port.
2.Input Devices For Grafhic
The graphic input devices subsystem includes the keyboard/sound,
mouse, tablet, dials, and lighted programmable-function keys (LPFK)
devices. These devices provide operator input primarily to graphic
applications
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a.Scanner
In computing, an image scanneroften abbreviated to just scanner,
although the term is ambiguous out of context (barcode scanner, CATscanner, etc.)is a device that optically scans images, printed
text,handwriting,or an object, and converts it to adigital image
b.Camera Digital
A digital camera(or digicam) is acamerathat encodesdigital
imagesandvideosdigitally and stores them for later reproduction.[1]Most
cameras sold today are digital,[2]and digital cameras are incorporated into
many devices ranging fromPDAsandmobile phones(calledcameraphones)to vehicles.
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3.Input Devices for Audio
Audio input devices allow a user to send audio signals to a computer for
processing, recording, or carrying out commands. Devices such as
microphones allow users to speak to the computer in order to record a
voice message or navigate software. Others are made to interface a
computer with a CD audio source, digital audio, orMIDIinstrument such as
a synthesizer.
a.Microphone
b.Midi Keyboard
MIDI keyboardis typically apiano-style user interfacekeyboarddevice
used for sendingMIDIsignals or commands over a USB or MIDI cable to
other devices connected and operating on the same MIDI protocol interface
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4.Input Devices for Video
a.Video Camera
A video camerais acameraused for electronicmotion pictureacquisition,
initially developed by thetelevisionindustry but now common in other
applications as well.
b.Web Camera
A webcamis avideo camerathat feeds orstreamsits image in real time toor through acomputerorcomputer network.When "captured" by the
computer,
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5.Pointing Devices
A pointing deviceis aninput interface(specifically ahuman interface
device)that allows auserto inputspatial(i.e., continuous andmulti-
dimensional) data to acomputer
a.Mouse
Incomputing,a mouseis anpointing devicethat detectstwo-
dimensionalmotion relative to a surface. This motion is typically translated
into the motion of apointeron adisplay,which allows for fine control of
agraphical user interface.
b.Touch Screen
A touchscreenis anelectronic visual displaythat the user can control
through simple ormulti-touch gesturesby touching the screen with a
special stylus/pen and-or one or more fingers.
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Output Devices
Meaning/Function:
An output deviceis any piece ofcomputer hardwareequipment used to
communicate the results ofdata processingcarried out by aninformation
processing system(such as acomputer) which converts the electronically
generated information into human-readable form.
1.Monitor
A monitoror a displayis anelectronic visual displayforcomputers.The
monitor comprises the display device,circuitryand an enclosure.
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2.Printer
In computing, a printeris aperipheralwhich makes a representation of an
electronic document on physical media. Individual printers are designed to
support local and network users at the same time. Some printers can print
documents stored onmemory cardsor fromdigital camerasandscanners.
3.Speaker
Computer speakers, or multimedia speakers, arespeakersexternal to a
computer, that disable the lower fidelity built-in speaker.
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Storage Devices
Meaning/Function:
A data storage deviceis a device
forrecording(storing)information(data). Recording can be done using
virtually any form ofenergy,spanning from manual muscle power
inhandwriting,to acoustic vibrations inphonographicrecording, to
electromagnetic energy modulatingmagnetic tapeandoptical discs.
1.Primary Storage
A computer's internalhard driveis often considered a primary
storage device.
a.RAM (RANDOM ACCESS MEMORY)
Random Acc ess Memoriesis the fourth studio album byFrenchelectronic musicduoDaft Punk.It was released by the duo's imprint
Daft Life, under exclusive license toColumbia Records,on 17 May 2013.
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b.ROM (Read Only Memori)
Read-only memory(ROM) is a class ofstoragemedium used
incomputersand other electronic devices. Data stored in ROM can only be
modified slowly or with difficulty, so it is mainly used to
distributefirmware(softwarethat is very closely tied to specifichardware,
and unlikely to need frequent updates).
2.Secondary Storage
Auxiliary memory, also known as auxiliary storage, secondary
storage, secondary memoryor external memory, is used to store a
large amount of data at lesser cost per byte thanprimary memory.They
are two orders of magnitude less expensive than primary storage. In
addition,
a.Magnetic Medium
Magnetic storage(or magnetic recording) is the storage ofdataon
amagnetizedmedium. Magnetic storage uses different patternsofmagnetizationin a magnetizable material to store data and is a form
ofnon-volatile memory.The information is accessed using one or
moreread/write heads.
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b.Optical Medium
An optical mediumis material through whichelectromagnetic
wavespropagate. It is a form oftransmission medium.
Thepermittivityandpermeabilityof the medium define how
electromagnetic waves propagate in it.
c.Flash Memory
Flash memoryis an electronicnon-volatilecomputer storagemedium that
can be electrically erased and reprogrammed.Introduced byToshibain 1984, flash memory was developed
fromEEPROM(electrically erasable programmable read-only memory).
There are two main types of flash memory, which are named after
theNANDandNORlogic gates. The internal characteristics of the
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individual flash memory cells exhibit characteristics similar to those of the
corresponding gates
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References