input devices of a computer is explained and types are briefed with images

1. INPUT DEVICES OF A
COMPUTER
BY SABARIANTHSURYAPRAKASH

2. INPUT DEVICE
IN COMPUTING, AN INPUT DEVICE IS A PERIPHERAL (PIECE OF
COMPUTER HARDWARE EQUIPMENT) USED TO PROVIDE
DATA AND CONTROL SIGNALS TO AN INFORMATION
PROCESSING SYSTEM SUCH AS A COMPUTER OR
INFORMATION APPLIANCE. EXAMPLES OF INPUT DEVICES
INCLUDE KEYBOARDS, MOUSE, SCANNERS, DIGITAL
CAMERAS AND JOYSTICKS.
INPUT DEVICES ARE RESPONSIBLE FOR CONVERTING
INFORMATION IN HUMAN READABLE FORM TO THE BINARY
CODE THAT COMPUTERS USE.

3. TYPES OF INPUT DEVICES
INPUT
DEVICES
POINTING
DEVICES
MOUSE
TRACKBALL
TOUCHPAD
POINTING STICK
GAME
CONTROLLER
S
GAMING WHEEL
JOYSTICK
GAMEPAD
KEYBOARD/
STYLUSES
SCANNERS
IMAGE SCANNER
BARCODE
SCANNER
OMR
OCR
BIOMETRIC
SCANNER
CAMERAS
DIGITAL STILL
CAMERA
DIGITAL VIDEO
CAMERA
WEBCAM
MICROPHONES

4. POINITNG DEVICES
POINTING DEVICES ARE THE MOST COMMONLY USED INPUT
DEVICES TODAY. A POINTING DEVICE IS ANY HUMAN
INTERFACE DEVICE THAT ALLOWS A USER TO INPUT SPATIAL
DATA TO A COMPUTER. IN THE CASE OF MOUSE AND
TOUCHPADS, THIS IS USUALLY ACHIEVED BY DETECTING
MOVEMENT ACROSS A PHYSICAL SURFACE
MOUSE:
A MOUSE IS A POINTING DEVICE THAT WE USE TO CLICK ON
ICONS AND BUTTONS. MOVEMENTS OF THE POINTING
DEVICE ARE ECHOED ON THE SCREEN BY MOVEMENTS OF
THE POINTE, CREATING A SIMPLE, INTUITIVE WAY TO
NAVIGATE A COMPUTER'S GRAPHICAL USER INTERFACE (GUI).

5. TYPES OF MOUSSES ARE AS FOLLOWS
KKK
TRACKBALL: IT IS SIMILAR TO MECHANICAL MOUSE, BUT IT HAS
THE BALL ON THE TOP

6. TOUCHPAD: IT IS THE LITTLE DARK RECTANGLE THAT YOU
USE TO MOVE THE CURSOR WITH YOUR FINGERS, OFTEN
FOUND ON NOTEBOOK COMPUTERS
POINTING STICK: LITTLE ROD USED ALMOST EXCLUSIVELY
ON NOTEBOOKS.

7. GAME CONTROLLERS
GAME CONTROLLERS ARE USED FOR GAMING TO BETTER
CONTROL SCREEN ACTION
TYPES OF GAME CONTROLLERS ARE BRIEFED BELOW:
GAMING WHEEL: IT IS A STEERING WHEEL AND FOOT
PEDALS FOR VIRTUAL GAMING
JOYSTICK: IT IS A VERTICAL HANDLE WITH PROGRAMMABLE
BUTTONS THAT CONTROL ACTIONS

8. GAME PAD: IT IS A MULTIFUNCTIONAL INPUT DEVICE WITH
PROGRAMMABLE BUTTONS, THUMB STICKS, AND
DIRECTIONAL PAD

9. SCANNERS
SCANNERS ARE USED TO CONVERT INFO THAT EXISTS IN
VISIBLE FORM INTO ELECTRONIC FORM. TYPES OF SCANNERS
ARE :
IMAGE SCANNER: CAPTURES IMAGES, PHOTOS, TEXT &
ARTWORK THAT ALREADY EXIST ON PAPER
BARCODE SCANNER: READS INFO THAT IS IN FORM OF
VERTICAL BARS, WHERE THEIR WIDTH & SPACING REPRESENTS
DIGITS (USED IN POS)

10. OPTICAL MARK READER: DETECTS THE PRESENCE OR
ABSENCE OF A MARK IN PREDETERMINED SPOT ON THE PAGE
OPTICAL CHARACTER READER: READS THE CHARACTER
THAT APPEAR IN THE PAGE OR SALES TAG (USED IN POINT OF
SALE)

11. BIOMETRIC SCANNER: SCANS SOME HUMAN PHYSICAL
ATTRIBUTE LIKE YOUR FINGERPRINT OR IRIS FOR SECURITY
PURPOSES.

12. DIGITAL CAMERAS
DIGITAL CAMERA CAPTURES STILL IMAGES OR VIDEOS AS A
SERIES OF 1S OR 0S. SOME WILL CAPTURE ONLY STILLS, SOME
MAY DO BOTH. THE TYPES OF DIGITAL CAMERAS ARE:
DIGITAL STILL CAMERA: IT DIGITALLY CAPTURES STILL
IMAGES IN VARYING RESOLUTIONS

13. DIGITAL VIDEO CAMERA: CAPTURES VIDEO DIGITALLY.
WEBCAM: CAPTURES DIGITAL VIDEO TO UPLOAD TO THE WEB

14. MICRPHONES
CAPTURES AUDIO FOR CONVERSION INTO ELECTRONIC FORM
IS CALLED A MICROPHONE