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Input and output devices
Input devices allow users to interact with computers and include keyboards, mice, digital cameras, scanners, microphones, and biometric sensors like fingerprint readers. Output devices receive data from computers for display or output, such as monitors that display video and text, printers that print hard copies, speakers that output audio, and projectors that project computer displays onto screens or surfaces. Common input devices are keyboards for typing and mice for controlling the cursor, while common output devices are monitors for visual display and printers for hard copies.
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This section introduces input devices, detailing keyboards, mice, biometrics, cameras, and more.This section covers output devices, highlighting monitors, printers, speakers, projectors, and their functions.
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Input and output devices
- 1. INPUT/OUTPUT DEVICES BY : MA S A U D J AV E D
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- 3. INPUT DEVICES •An inputdevice is any hardware device that sends data to a computer, allowing you to interact with computer and control the computer. •The most commonly used or primary input devices on a computer are the keyboard and mouse.
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- 5. KEYBOARD •A computer keyboardis one of the primary input devices used with a computer. •Keyboards allow you to input letters, numbers, and other symbols into a computer.
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- 7. MOUSE •A mouse isinput device that controls a cursor in a screen and select text, icons, files, and folders. •The mouse is placed on a flat surface such as a mouse pad or a desk and is placed in front of your computer.
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- 9. BIOMETRICS •Biometrics is theidentification of a person by the measurement of their biological features. •For example, a user identifying themselves by their finger print is considered a biometrics identification.
- 10. TYPES OF BIOMETRICS •Handscanner - A biometric hand scanner will identify the person by the palm of their hand. •Finger scanner - Finger scanner identifies the person by their finger print. These can be a secure method of identifying a person.
- 11. TYPES OF BIOMETRICS •Retinaor iris scanner - A biometric retina or iris scanner identifies a person by scanning the iris or retina of their eyes. •Voice scanner - voice scanner will mathematically break down a person's voice to identify them. These scanners can help security.
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- 13. DIGITAL CAMERA •A digitalcamera is a device that takes pictures like a regular camera. •A digital camera include –Display screen –Storage
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- 15. LIGHT PEN •A lightpen is a light-sensitive pointing input device commonly used to select or modify text or data on a screen.
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- 17. SCANNER •A scanner isa input device that optically "reads" and image and converts it into a digital form. •For example, a scanner may be used to convert a picture or document(hard copy) into a digital file(soft copy).
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- 19. WEBCAM •A webcam isa input device that connects to a computer and the Internet and captures either still pictures or motion video of a user.
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- 21. BARCODE READER/SCANNER •Bar CodeReader is a device used for reading bar coded data. Bar coded data is generally used in labelling goods, numbering the books, etc. •It may be a handheld scanner or may be embedded in a stationary scanner.
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- 23. MICROPHONE •Microphone is aninput device to input sound that is then stored in a digital form. •The microphone is used for various applications such as adding sound to a multimedia presentation or for mixing music.
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- 25. OUTPUT DEVICES •An outputdevice is any device that receives data from a computer, usually for display or output. •For example, the image shows a village, an output device that can make a hard copy of any information shown on your monitor.
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- 27. MONITOR • A monitoris an output device that displays video images and text. •It makes images from tiny dots, called pixels. •The sharpness of the image depends upon the number of pixels.
- 28. CONTINUE… •There are twokinds of viewing screen used for monitors. •Cathode-Ray Tube (CRT) •Flat-Panel Display
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- 30. PRINTER •Printer is anoutput device, which is used to print information on paper. •Printer convert soft copy of data into hard copy of data
- 31. TYPES OF PRINTERS •LinePrinters: Line printers are the printers which print one line at a time. •Character Printers: Character printers are the printers which print one character at a time. •Laser Printers: They use laser lights to produce the characters to be printed on a page.
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- 33. HEADPHONE •Headphone is outputdevice that either plug into your computer. • Headphones are used for listen audio without disturbing others.
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- 35. SPEAKERS • A computerspeaker is a device that connects to a computer to generate sound. •The signal used to produce the sound that comes from a computer speaker is created by the computer's sound card.
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- 37. PROJECTOR •A projector isan output device that can take images generated by a computer and reproduce them onto a screen, wall, or other surface. •Typically, the surface projected onto is large, flat, and lightly colored.
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