INPUT DEVICES OF A COMPUTER

BY SABARIANTH SURYAPRAKASH

INPUT DEVICEIN 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.

TYPES OF INPUT DEVICESINPUT

DEVICES

POINTING DEVICES

MOUSE

TRACKBALL

TOUCHPAD

POINTING STICK

GAME CONTROLLE

RS

GAMING WHEEL

JOYSTICK

GAMEPAD

KEYBOARD/ STYLUSES SCANNERS

IMAGE SCANNER

BARCODE SCANNER

OMR

OCR

BIOMETRIC SCANNER

CAMERAS

DIGITAL STILL

CAMERA

DIGITAL VIDEO

CAMERA

WEBCAM

MICROPHONES

POINITNG DEVICESPOINTING 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 SURFACEMOUSE: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).

TYPES OF MOUSSES ARE AS FOLLOWSKKK

TRACKBALL: IT IS SIMILAR TO MECHANICAL MOUSE, BUT IT HAS THE BALL ON THE TOP

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.

GAME CONTROLLERSGAME 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

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

SCANNERSSCANNERS 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)

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)

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

DIGITAL CAMERASDIGITAL 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

DIGITAL VIDEO CAMERA: CAPTURES VIDEO DIGITALLY.

WEBCAM: CAPTURES DIGITAL VIDEO TO UPLOAD TO THE WEB

MICRPHONES

CAPTURES AUDIO FOR CONVERSION INTO ELECTRONIC FORM IS CALLED A MICROPHONE