Input device pp.pptx

Input devices presentation slide.

1. Outlines Input devices Keyboard Mouse Presented by: Scanner Aashika Lamichhane Digital camera Microphone Its uses

2. Input Devices In computing, an input devices is a piece of equipment used to provide data and control signals to an information processing system, such as a computer or information applications . Devices that is used to feed data into a computer is called input devices. Some examples of input devices are: keyboard, mouse, scanners, camera, joysticks, microphones, etc.

3. Keyboard Keyboard is the primary input device of any computer system. It is called QWERTY . It is operate by converting key presses to electronic signals in binary digital form. The key of computer keyboard are classified into following fig: Keyboard

4. Mouse Mouse is a hand-held pointing device which is typically translated into the motion of a pointer on a display. It allows us to control the pointer in a graphical user interface (GUI) for pointing, moving and selecting text , icon , files and folder. There are three (3) types of mouse: (ii ). Optical mouse : An optical mouse is a computer mouse which uses a leaser light to detect the mouse’s movement.

5. 1 Touch panel A touch panel or touch screen is an input device that lets users interact with a computer by touching the screen directly. A user can give input or control the information processing system by touching the screen with a special stylus or fingers. Fig: Touch Panel

6. Light Pen A light pen is also an input device used for pointing or selecting the objects in the screen. It is a pen like device, which consists of photo sensitive detector as its tip. It allows the user to point to displayed objects, or draw on the screen, in a similar way to touch a screen but with greater positional accuracy. It is generally used for drawing Fig: Light pen and in computer aided design(CAD). Scanners Scanners are used to input images an or text printed on a paper into a computer,

7. allowing the computer to read and/ or display the scanned object. A scanner works by digitizing an image. This means it divides printed images into grid of boxes and representing each box with a combination of zeros and ones. There are different kind of scanners, such as: Optical Character Reader (OCR). Optical Bar-Code Reader (OBCR). Optical Mark Reader (OMR). Magnetic Ink Character Recognition (MICR). Fig: OCR OBCR Fig: OMR MICR

8. Touch Pad Touch Pad is a pointing device which has a tactical sensor in it. It is specialized surface that can translated the motion and position of a user’s fingers to a relative position on the operating system that is made output to the screen. Touch Pad are the common feature of laptops and is also a substitute for a mouse. Fig: Touch Pad Digital Camera Digital camera is a camera that produces digital images which can be stored on a computer, displayed on a screen and printed as well. These camera are now widely incorporated into mobile Fig: Camera devices like smartphone with the same or more capabilities and features.

9. Microphone Microphone is a common input device, generally referred as a mic or mike which converts sound into electrical signal. Microphone comes from the Greek words ‘micro’ meaning small and ‘phone’ meaning voice . Microphones enable many types of audio recording devices for purposes including communications of many kinds, as well as music vocals and sound recording. Fig: Microphone Uses The main purpose of an input device is to enable computer operators to have control of the computer and send data such as text, images or sounds to the computer .

10. Thank You