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Institute of Allied Science & Computer Applications Institute of Technology & Management

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INPUT DEVICE An INPUT DEVICE is any peripheral (piece of computer hardware equipment). Which is use to provide data and control signals to an information processing system with computer acceptable language. INPUT devices make up the hardware interface.

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KEY BOARD KEYBOARD- The KEYBOARD is a way to input letters or numbers into different applications of programs. A keyboard also has special keys that help operate the computer. The most popular keyboard used today is the 101-keys QWERTY keyboard.

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TYPES OF KEYS IN KEYBOARD Alphabetic Keys Numeric Keys Function Keys Navigation keys Extra Keys

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Qwerty keyboard

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A MOUSE function as a point-and-draw device by detecting two-dimensional motion relative to its supporting surface. We can use it only with GUI (Graphical user interface) based on operating system. E.g. Windows. The main goal of any mouse is to translate the motion of your hand into signals that the computer can use. MOUSE

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MECHANICAL MOUSE- A mouse that uses a rubber ball that makes contact with wheels inside the unit when it is rolled on a pad of desktop. 1: Moving the mouse turns the ball2: X or Y rolls grip the ball and transfer movement.3: Optical encoding disks include light holes.4: Infrared LEDs shine through the disks.5: Sensors gather light pulses to convert to X and Y Velocities. OPERATING OF A MECHANICAL MOUSE: TYPES OF MOUSE

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OPTICAL MOUSE- A mouse that uses light to detect movement. It emits a light and senses its reflection as it is moved. As the user rolls the mouse on a flat surface, the cursor on the screen also moves in the direction of the mouse’s movement. OPTICAL MOUSE

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JOYSTICK JOYSTICK- A JOYSTICK is used to move the cursor from place to place, and allow moves in all directions and controls the movement of cursor. If offers three types of control such as digital, glide, direct. They input directional data like a mouse but work by switches as the joystick is moved. It consist of a stick that rotate on axis and reports it angle or direction to the device it is controlling. A joystick is used mostly for computer games.

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SCANNER SCANNER- A SCANNER is used to copy pictures of other things and save them as files in the computer. A light moves slowly over the surface of the picture of object to be scanned. The colors of the reflected light are detected and digitized to built up a digital image.

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SCANNERS FLATE-BED SCANNER- A FLATE-BED scanner is like a copier machine consisting of a box having a glass plate on its top and a lid that covers the glass plate. Its also called desktop scanners, are the most versatile and commonly used scanners. SHEET-FED SCANNER- It is similar to FLATE-BED scanner except the document is moved and the scan head is immobile. A sheet-fed scanner looks a lot like a small portable printer. HAND-HELD SCANNER- A HAND-HELD scanner has a set of light emitting diodes encased a small case that can be held in hand conveniently to scan a Documents. It is use the same basic technology as a Flat-Bed scanner. This type of scanner typically does not provide good image quality. However , it can be useful for quickly capturing text.

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TRACK BALL TRACK BALL- A TRACK BALL is used 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 parts stays still. It has buttons like a standard mouse.

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TOUCH SCREEN TOUCH SCREEN- A TOUCH SCREEN is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. Touch screens are used with information, computer-based training devices, and system designed to help individuals who have difficulty manipulating a mouse with keyboard.

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LIGHT PEN LIGHT PEN- A LIGHT PEN is a hand-held electro-optical pointing input device that utilize a light-sensitive detector to allow the computer to determine where on that screen the pen is aimed. It facilities drawing images and select objects on the display screen by directly pointing the object with the pen.

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DATA GLOVE- DATA GLOVE is a device to interact with animated artificial object. The person wears a glove fitted with sensors and electrical wires hooked to compatible computer. As he rotates or move his hand and manipulate his fingers, he can manipulate the graphic object on the screen. DATA GLOVE

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BAR CODE READER BAR CODE READER- Bar code is a machine readable code in the form of a pattern of parallel vertical lines of varying width which is read by bar code reader. Bar code reader is a electronic device that scans a bar code image and converts it into an alphanumeric value that is feed in a computer which connected to a Bar code reader. It use a leaser beam scanning technology. It is commonly use for labeling Goods in super market, Books in library, Package, Badges etc.

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OTHER INPUT DEVICES DIGITAL CAMERA MICROPHONE DISK DRIVER DIGITISERS OPTICAL READER(OR) – 1. Optical character recognition 2. Optical mark recognition 3. Magnetic ink character recognition

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