Topic - A Typical Computer System

Form 4 Computer

Studies

Input Devices

EDD5161R Group8 members :Kwok Ming Ying Anita (98031479)Koo Chi Kit (98032890)Wong Yuk Wa (98032710)Law Ngai Tat Andrew (98032220)

•Collect text used in presentation

•Integrate all materials to Powerpoint slides

•Collect all images used in presentation

•Add sound, animation and special effects

Target Audience :•Class - Form 4 science students•Age/Grade - 15/Band 1•Prior knowledge: Basic knowledge & experience

in using mouse and keyboard

Other Materials : •Some concrete objects of input devices for demonstrationPurpose :

•Lecturing

Input Device -Input Device -

a piece of hardware that is used for providing information to the computer

Examples are ...

Mousecommon pointing device used with a computer

flat bottom with one or more buttons on the top and a multidirectional detection device (usually a ball) on the bottom

controls by moving and clicking the mouse

Different Type of Mice

Cordless wheel mouse3-button mouse

Wheel mouse for notebooksiMouse for iMac

Mouse Interface

Serial

PS2

USB

Trackballbasically an inverted mousethe user rotates the ball itself while clicking nearby buttons

Joystick and Gamepada popular pointing device, used mostly for playing computer games

Keyboarda keypad device with buttons or keys that a user presses to enter data characters and commands into a computerFunction key

Numeric keypad

Different Type of Keyboard

104-key keyboardNatural keyboard

Keyboard for the Mac

ViewCamcapture video signal and put it

directly into PC for editingcan be used for video-conferencing

Digital Cameraafter taking pictures, the user

can connect the camera directly to a home computer, stored on disks, or sent to friends via electronic mail

Digital camera

Photo printer for digital camera

Memory card fordigital camera

Pen Inputallow users to input Chinese with

out using the tradition Chinese input method

Smart pen

Light Penallow users to point at the graphi

cs on the display to select functions or to locate desired positions

Touch Screento respond when a position of the

screen is touched by the fingers of the user

A touch screen kit solution

Microphonetransmit wave signal to c

omputer

Bar code readerread the bar codes(series of

parallel vertical lines used to assign a unique identification code to an item) and the information is then transmitted to computer for processing

An example of a bar code

OMR reader the Opitical Mark Recognition

technique can read pencil marks registered in specified position on a form

MICR readeruse Magnetic Ink Character

Recognition techniquemagnetizing the magnetic ink characters on documents and sensing the signal induce by each character as it passes a reading head

it can only read standard MICR characters

can process 2000 cheques per minute

Magnetic Ink Character

MICR character set - E13B

MICR character set - CMC7

Scanner

Image Scan Edit

to recognize different kindsof input devices mouse, keyboard,bar-code reader

Text Image

OCR

To recognize differentkinds of input devices•mouse•keyboard•bar-code reader

Edit

Quiz

1.What kind of input device should be chosen to manage the stock in the supermarket ?

B. Point of Sale Terminal

A. Mouse

C. OMR ReaderD. Monitor

B. Point of Sale Terminal

2.Mr. Wong wants to edit a photo using his computer. What input device should he choose ? B. Image Editing

Software

A. Keyboard

C. Image ScannerD. MouseC. Image Scanner

3.What is the standard input device in a computer system ?

B. KeyboardA. Mouse

C. MonitorD. Joystick

B. Keyboard

4.What kind of input device should be used in Video Conferencing ?

B. Point of Sale Terminal

A. WebCam

C. Digital ViewCamD. None of the above

A. WebCam

5.Which of the following is used to recognize characters in cheque ?

B. OMR readerA. OCR reader

C. MCR readerD. MICR readerD. MICR reader

The End