Input Devices

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

2. Ergonomic – Based on comfort

-DVORAK layout

JOYSTICK A joystick is used to move the cursor from place to place, and to click on various items in programs. They input directional data like a mouse but work by switches being closed as the joystick is moved left or right and up or down. It consists of a stick that pivots on a base and reports its angle or direction to the device it is controlling. A joystick is used mostly for computer games.

1. STICK 2. BASE 3. TRIGGER 4. EXTRA BUTTONS 5. AUTO FIRE SWITCH 6. THROTTLE 7. HAT SWITCH 8. SUCTION CUP

A scanner is used to copy pictures or other things and save them as files on the computer. A light moves slowly over the surface of the picture or object to be scanned. The colours of the reflected light are detected and digitised to build up a digital image.

A TRACK BALL is used in the same way as a mouse but it is useful where desk space is limited. It is like an upside down mouse because the user rotates the ball and the main body part stays still. It has buttons like a standard mouse.

A Spaceball provides 6 degrees of freedom. Strain gauge measures the amount of pressure applied to the spaceball to provide input for spatial positioning and orientation as the ball is pushed or pulled in varies directions.