Input devices By:Kashish

Input devices

Input devices

enables the user to

input data and

commands to the

computer to be

processed.

Types of input devices

KeyboardMouseJoystick

The keyboard is the most widely used input device.

As you press keys on the keyboard, an electrical signal representing that key is sent to the computer.

Keyboard

Types of keys

Typewriter keys

Function keys Numeric keypad

Directional keys

The standard alphabetic and numeric characters you would find on a typewriter.

Typewriter keys

Special keys that perform some specific function for the application being run.

Function keys

Used for mathematical operations.

Numeric keypad

Used to move the cursor around the screen.

Directional keys

The mouse is the pointing device that rolls around on a flat surface and controls the location of the point on the screen.

Mouse

The mouse performs the following functions :

Pointing ClickingDragging Double-clicking

(con)...

Placing the on-screen pointer at a specific place

Pointing

Pressing and releasing the mouse button.

Clicking

Holding down the mouse button and dragging an object to a new location by dragging the mouse.

Dragging

Pressing and releasing the mouse button twice very quickly (The primary mouse and the secondary mouse).

Double-clicking

Pointing devices

Joystick Trackball

Joysticks consist of a metal or plastic handle mounted on a base that you can move in any direction to move the pointer or other object.

These typically are used for video games.

Most have buttons that can be pushed or clicked to control input\output.

Joystick

This is like a mouse turned upside down.

You roll a ball around with your fingers to control the location of the pointer.

These frequently are found on notebook computers.

Trackball

Other input devices

Digital cameraScanners

Device that can convert a graphical image and input it to the computer.

Scanner

Used to take pictures and store them on a magnetic disk instead of on film.

Their images can be input directly into the computer.

Digital cameras

Thanks, Guys!!!

Rules

Raise your hands up if you want to answer.

You can discuss in your group quietly or else minus one.

Listen to what Kashish says.

Question and answers (easy questions)

Boys Girls

What is a mouse ? What is a keyboard ?

What is a scanner ? What is digital

camera ?

True or false

Boys Girls

Trackballs are frequently found in notebook computers

Yes No

Directional keys are the keys which is used in maths ?

Yes No

Better luck next time !!

Bingo!!!

True or false

Boys Girls

Scanners can convert a graphical image and input it to the computer

Yes No

Typewriter keys have function keys.

Yes No

Winner

Congratulations!! And celebrations!!

The winner is