Kailas Sree Chandran

Benoy K M

Krishnakumar R

S7 INDUSTRIAL

CLASSIFICATION

Input Devices for TEXTS

Input Devices for GRAPHICS

Input Devices for AUDIO

Input Devices for Video

POINTING Devices

DIFFERENT INPUT DEVIES

TYPES OF KEYS

TYPES OF KEYBOARDS

1. Based on Layout

-QWERTY layout

-DVORAK layout

2. Ergonomic – Based on

comfort

JOYSTICK

A joystick is used to move the cursor from placeto place, and to click on various items inprograms. They input directional data like amouse but work by switches being closed as thejoystick is moved left or right and up or down. Itconsists of a stick that pivots on a base andreports its angle or direction to the device it iscontrolling. A joystick is used mostly forcomputer games.

1. STICK2. BASE3. TRIGGER4. EXTRA BUTTONS5. AUTO FIRE SWITCH6. THROTTLE7. HAT SWITCH 8. SUCTION CUP

A scanner is used to copy pictures orother things and save them as files onthe computer. A light moves slowlyover the surface of the picture orobject to be scanned. The colours ofthe reflected light are detected anddigitised to build up a digital image.

A TRACK BALL is used in the sameway as a mouse but it is useful wheredesk space is limited. It is like anupside down mouse because the userrotates the ball and the main bodypart stays still. It has buttons like astandard mouse.

A Spaceball provides 6 degrees offreedom. Strain gauge measures theamount of pressure applied to thespaceball to provide input for spatialpositioning and orientation as the ballis pushed or pulled in variesdirections.