module4 peripherals

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COMPUTER PARTS & COMPONENTS PERIPHERALS

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ICTL for Secondary School - Hardware Module

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MODULE 4

PERIPHERALS

Curriculum Development Centre Ministry of Education Malaysia


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1. Name of Module : Computer Parts & Components - Peripherals 2. Learning Outcomes: The students should be able to:

• state the definition of peripheral

• identify different types of peripherals

• state examples different types of peripherals

• explain the functions of each peripheral

3. Knowledge and Skills:

1. Main computer components

4. Module Summary: At the end of the module, students should be able to know the

functions of each peripheral

This module contains 2 activities:

Activity 1: Definition of Peripheral Activity 2: Different Types and Functions of Peripheral


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Activity 1: Definition & types of peripheral Peripheral Device

External hardware devices attached to the computer are called peripheral devices

There are three types of peripheral devices :

• Input devices • Output devices • Storage devices

Input Devices

Input devices are any electronic device that are connected to a computer and produces input signals.

Output Devices

Output is the result of data processing activity when it is presented externally to the system. The output from a computer can be printed or displayed form . An output device is hardware that is capable of delivering or showing information to one or more users. An output device shows, prints and presents the results of a computer’s work.

Figure 1: Peripheral Device

Figure 2: Input Device

Figure 3: Output Device


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Storage Devices

Information and documents are stored in a computer storage so that it can be retrieved whenever they are needed later on. Computer storage is the holding of data in an electromagnetic form for access by a computer processor.

Activity 2: Different types and the functions of peripheral 1. Printers

A printer is another example of an output device that can be used to print text and graphics on mediums such as paper, transparency film or even cloths.

A photo printer is a colour printer that produces photo quality pictures. An image setter produces high quality output compared to an ordinary laser printer. An image setter is a high resolution output device that can transfer electronic text and graphics directly to film, plates, or photo-sensitive paper.

Hard Disk Diskette CD Rom Thumb Drive

Figure 4: Printer

Figure 3: Printer


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2. Scanners

In computing, a scanner is a device that analyzes images, printed text, handwriting, or objects (such as an ornament) and converts it into a digital image. These are examples of scanners:

a. The flatbed scanner is the most common in offices. b. Hand-held scanners are no longer used due to the difficulty in obtaining a high-

quality image. c. Digital camera scanners, that are based on the concept of reprographic cameras. d. Planetary scanners, which take photographs of books and documents e. 3D scanners, for producing three-dimensional models of objects,

Planetary and 3D scanners are considerably more expensive than other types of scanners.

( source http://en.wikipedia.org/wiki/Image_scanner)

Drum

Pen or handheld

FlatbedSheet-fed

Figure 5: Handheld Scanner


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3. LCD Projector

LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. A Liquid Crystal Display (LCD) projector uses its own light source to project what is displayed on the computer onto a wall or projection screen. A digital light processing (DLP) projector uses tiny mirrors to reflect light that can be seen clearly in a well-lit room.

4. Digital Cameras

Digital Cameras are electronic devices used to capture and store photographs digitally, using the memory card without using photographic film like conventional cameras, or recording images in an analog format to magnetic tape like many video cameras.

Modern compact digital cameras are typically multifunctional, with some devices capable of recording sound and/or video as well as photographs.

Figure 6: LCD Projector

Figure 7: Digital Camera


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5. External CD Drives

The external DVD/CD-RW combo drive functions as a DVD player, a CD-RW drive and a CD-ROM drive. This allows you to install computer applications, files, music and movies on CD. It is easy to be carried around.

6. External Storages

External storage is an alternative storage. It is very useful to store programs and data for future use. The storage is required for two reasons: 1. The working memory of the CPU is limited in size and cannot always hold the amount of

data required. 2. Data and programmes in storage do not disappear when the power is turned off.

Figure 8: CD/DVD Writer

Figure 8: Storage Device


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Worksheet 1: Label The Figure

a. CD or DVD b. External hard disk c. Tape drive d. Miniature hard disk e. Zip disk f. Flash memory card g. USB Flash drive

1. _________

2. _________

3. _________ 4. _________


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5. _________ 6. _________

7. _________


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Worksheet 2: Fill in the blank with the correct word.

Laser printer Output device Flash card Tape Bar code Pen drive flat panel monitor

1. Identification code that consists of vertical line and spaces of different widths is known

as _________________________ 2. __________ storage requires sequential access.

3. A _____________ is commonly used as the ‘film’ for digital cameras. 4. __________________ is any type of hardware component that conveys information to

one or more people.

5. An LCD monitor also call a _______________ produces harp, flicker free images. 6. A ______________ is flash memory storage device that plugs in a USB port.

7. _____________ is a high speed, high quality non impact printer


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Worksheet 3:

Devices Types & Names Functions


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Reference Cashman, S. (2006) Discovering Computers 2006. USA : Thomson Course Technology. Ibrahim Ahmad, Mohd Hafiz et al (2007) Information and Communication Technology (ICT) Based on SPM Syllabus. Selangor: Venton Publishing (M) Sdn Bhd. NCC Education (2002) Computer Studies, Computer Ace. Sri Lanka : Computer Pioneers. Basic Computing (2003) by TMEdu Tech (M) Sdn Bhd http://www.wikipedia.org http://images.search.yahoo.com http://www.google.com.my CD courseware ICT