Module 4 Peripherals

!

COMPUTER PARTS & COMPONENTS PERIPHERALS

PUSAT PERKEMBANGAN KURIKULUM KEMENTERIAN PELAJARAN MALAYSIA

1

MODULE 4 PERIPHERALS

Curriculum Development Centre Ministry of Education Malaysia

2

1.

Name of Module:

Computer Parts & Components - Peripherals

2.

Learning Outcomes: The students should be able to: a. state the definition of peripheral b. identify different types of peripherals c.

state examples different types of peripherals

d. explain the functions of each peripheral 3.

4.

Knowledge and Skills: a.

identify main computer components

b.

identify different types of peripherals

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 & functions of peripheral

3

Activity 1: Definition & types of peripheral a. PERIPHERAL DEVICE Peripheral (Figure 1) are pieces of computer hardware that are added to a host computer, i.e. any hardware except the computer, in order to expand its abilities. Most of those devices are optional in nature. External hardware devices attached to the computer are called peripheral equipments. There are three types of peripheral: • Input devices • Output devices • Storage devices

Figure 1 – Examples of peripherals

b. INPUT DEVICES Input devices are any electronic device that are connected to a computer and produces input signals. Figure 2 shows some examples of computer input devices

Figure 2 – Examples of Input Devices

c. OUTPUT DEVICES Output devices are the result of data processing activity when it is presented externally to the system. It is a hardware that is capable of delivering or showing information to one or more users. The output from a computer can be in printed or displayed form (see Figure 3).

Figure 3 – Examples of Output Devices

4

d. STORAGE DEVICES Computer storage is the holding of data in an electromagnetic form, for access by a computer processor. Information and documents are stored in a computer storage so that it can be retrieved whenever they are needed later on. Figure 4 are examples of storage

. Hard Disk

Diskettes & CDs

Figure 4 – Examples of Storage Devices

5

Thumb Drivers

Activity 2: a.

Different types & the functions of peripheral

Printers A printer is an output device to print text or graphics on mediums such as paper, transparency film or even cloths. A photo printer is a colour printer that produces photoquality pictures.

Figure 5 – Examples of printers

6

b. Scanners A scanner is a device that analyzes images, printed text, handwriting, or objects (such as an ornament) and changes it into a digital image. The flatbed scanner is the most common in offices. Hand-held scanners, are popular but no longer used due to the difficulty in obtaining high-quality image.

The bar code scanner consists of a scanner, a decoder, and a cable that interfaces between the decoder to the computer or terminal. The scanner's function is to scan the bar code symbol and provide an electrical output to the computer that corresponds to the bars and spaces of the bar code.

The handheld scanners were extremely popular as they were cheap and relatively simple. However, the handheld scanner is not particularly accurate, usually has a maximum resolution of 600 dpi and can be quite difficult to use. Their main drawback is the limited scanning area and, whilst they are handy for scanning small images and narrow columns of text.

The Sheet Fed Scanner designed to scan individual sheets of paper automatically in much the same way as a fax machine. Their main advantage is that they have a small footprint, but this is frequently negated by the need to output the scanned paper directly onto the desktop.

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

7

c.

LCD Projector LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface such as on to a wall or screen. It is a modern slide projector.

Figure 7 - LCD Projector

d.

Digital cameras Digital cameras are electronic devices used to capture and store photographs digitally. They use memory card instead of 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 video as well as photographs.

Digital Camera

8

e.

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.

External CD Drives

f.

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.

Hard Disk

Thumb Drive

Diskette

Zip Disk

Flash Memory

Memory Stick

External Storage

9

CD-Rom

Smart Chip

EXERCISE 1 Label the figures shown below and write your answers on the lines given. You may use the words given below to help you. CD or DVD External hard disk Tape drive Miniature hard disk Zip disk Flash memory card USB Flash drive

1. _________

2. _________

4. _________

3. __________

10

5. _________

6. _________

7. _________

11

Look at the pictures given. Then, name the devices and state their functions. Devices

Name of devices

12

Functions

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

13