INPUT AND OUTPUTSafe Year10B

INPUT….What is input?

An input device is a hardware that put the data into the computer.

The two type of input is: Manual input devices Automatic input devices

MANUAL INPUT DEVICESFor example: Keyboard Mouse Touch pad Joystick Touch screen Scanner

KEYBOARD

Keyboard is the most common input device.

Advantage: The keyboard come with the computer when you buy it. Use to type easily

Disadvantage: It is easy to type the letter wrong

MOUSE This also the most common input device. This is use to select each program which is like our

finger. The mouse have two button and one wheel which let

you to scroll down the page.

Advantage: • Good for a desktop computer

Disadvantage:• It need a flat space to make it work.

TOUCHPAD The touch usually been use on the laptop which is

similar to the mouse but it was a touch. It were use by dragging your finger around to select

and move around on the screen.

JOYSTICK The joy stick is use to for playing a game such as

airplane game.

Advantage: It give better gaming experience.

Disadvantage It might be difficult for using as a mouse.

SCANNER

This is the only device that both input and output are the same one.

This device is a easy device to use and most devices this day use touch screen.

Advantage: Disadvantage: Easy to use. Expensive.

TOUCH SCREEN

Flatbed and handheld is the two type of scanner This device is use to scan any work sheet into the

computer. This device also been use to scan a barcode.• Advantage- all the image that been scan will be put

in the document• Disadvantage- image take a lot of memory.

AUTOMATIC INPUT DEVICESExample: M.I.C.R O.M.R O.C.R Barcode readers Magnetic stripe readers Biometric devices sensors

M.I.C.R

Optical Mark Reader (OMR) This device is use too make a multiple choice paper The paper that be print out need to use the pencil to fill in

Advantage: It can input the large amount of data

Disadvantage; If the pencil that fill in the answer is not dark enough it

not going to work

O.M.R

Magnetic Ink Character Recognition (m.i.c.r) This is use to produce a cheque which can produce 300

cheque a minute. This only recognize the number with a standard front.

At the bottom of each cheque there are: the cheque number the bank or building society sort code the customer's account number

O.C.R Optical Character Recognition (OCR) is a normal

scanner. It is use to scan the document on the piece of paper into the computer as it shown on the diagram.

Have a ability to scan the document accurately It is cheaper than the manual scanner

BARCODE READER Most of the thing that sale in the market have a

barcode so the barcode reader is need to use

The barcode give the information such as: The country of manufacture The name of the manufacture Produce code A barcode reader is an automatic input device which is

used to scan the barcode by using a visible red light.

MAGNETIC STRIP READER

Magnetic strip is found the credit card which hold the personal information in it. The magnetic strip reader is use to read the magnetic strip to get the information.

BIOMETRIC DEVICES

The biometric device is use to identify the person who put their finger on it. This device will get the biometric data into the main computer to indentify very

quickly. It use finger print

SENSOR

The sensor will collect the data automatically. It can store either immediately to the computer or store

for the period of time.

OUTPUT DEVICES Output is a devices that show the output of the input.

Example: Monitor Speaker Printer Laser printer Ink jet printer Dot-Matrix printer Plotter Light

MONITOR

A monitor or screen is the most common output devices. The picture on the monitor use about 1000 pixel which mean the more pixel

the more quality it is shown.

There are two type of monitor which is: cathode ray tube which is the old version monitor but it produce the heat

easily. Thin film transistor- TFT is an expensive monitor that is newer than the cathode

ray tube.

SPEAKER Most computer will have the small speaker in it which

you will be able to hear thing such as a video.

Advantage: Everybody can hear clearly which is the output of the

computer

Disadvantage:• High quality external speaker was expensive and

doesn’t come with the computer.

PRINTER

This is another common output device which make a hard copy of your work in the computer.

DOT MATRIX PRINTER

INK JET PRINTERLASER PRINTER

• This printer usually use in the office because it was quite.

• It print the large amount of work very quickly

• This is the old version printer that doesn’t been use anymore.

• This is useful when you need a carbon copy of it.

• It use a continuous paper.

• This printer is a cheap printer which is very common for people use

• This printer is best use at home.

LIGHT

This printer is a very high quality printer which print very clearly on the big paper.

They are used by engineers, architects and map-makers to draw plans of buildings, diagrams of machines or large scale maps.

There are three types of plotter: Flatbed plotters Drum plotters Pinch-roller plotters

PLOTTER

The LED light can be connected to the computer which mean we can turn it on or off easilyAdvantage:•It can be control by the computer•There are many colourDisadvantage:•If the LED was too hot it is possible that it will be break.