Input Devices


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Input Devices

  1. 1. InputDevices INPUT DEVICES - Harman Grewal 1
  2. 2. What Is Input?• Input is any data and instructions entered into the memory of a computer. 2 INPUT DEVICES - Harman Grewal
  3. 3. What Is Input? An input device is any hardware component that allows users to enter data and instructions into a computer. 3 INPUT DEVICES - Harman Grewal
  4. 4. Keyboard 4 INPUT DEVICES - Harman Grewal
  5. 5. Keyboard• Most desktop computer keyboards have… 5 INPUT DEVICES - Harman Grewal
  6. 6. INPUT DEVICES - Harman Grewal 6
  7. 7. Keyboard Types:1. QWERTY keyboardPronounced kwer-tee, refers to the arrangement of keys on a standard English computer keyboard or typewriter.The term comes from the fact the first 6 letters of the top row of keys are Q, W, E, R, T, and Y.The QWERTY design was patented by Christopher Sholes in 1874. 7 INPUT DEVICES - Harman Grewal
  8. 8. Keyboard Types2. DVORAK keyboardis designed so that the middle row of keys includes the most common letters. In addition, common letter combinations are positioned in such a way that they can be typed quickly.The Dvorak keyboard was designed in the 1930s by August Dvorak, a professor of education, and his brother-in-law, William Dealy. 8 INPUT DEVICES - Harman Grewal
  9. 9. Keyboard Types QWERTY keyboard DVORAK keyboard 9 INPUT DEVICES - Harman Grewal
  10. 10. Connection Keyboards1. Wireless KeyboardsThese use three basic types of connections:• Bluetooth - is a wireless technology for exchanging data over short distances.• Infrared (IR) - radiation is a type of electromagnetic radiation (a wave with electricity) .• Radio Frequency - band of frequencies that lie in the range 10 kilohertz to 300 000 megahertz and can be used for radio communications and broadcasting. 10 INPUT DEVICES - Harman Grewal
  11. 11. Connection Keyboards Bluetooth Infrared Radio Frequency 11 INPUT DEVICES - Harman Grewal
  12. 12. Connection Keyboards2. Wired Keyboards• PS/2 (Personal System/2) - is an electronic receptacle or plug found on computers.- It accepts a PS/2 cable with a mini-DIN connector, and is most often used to plug in a keyboard or mouse.• USB (Universal Serial Bus) - is a standard cable connection interface on personal computers and consumer electronics.- allows stand-alone electronic devices to be connected via cables to a computer (or to each other). 12 INPUT DEVICES - Harman Grewal
  13. 13. Connection Keyboards INPUT DEVICES - Harman Grewal 13
  14. 14. Pointing Devices 14 INPUT DEVICES - Harman Grewal
  15. 15. Pointing Devices• A mouse is a pointing device that fits under the palm of your hand comfortably. – Most widely used pointing device on desktop computers.• A mouse can be wired or wireless. 15 INPUT DEVICES - Harman Grewal
  16. 16. Pointing Devices Touchpad Pointing Stick • A touchpad is a • A pointing stick is aTrackball • A trackball is a stationary pointing small, flat, rectangular pressure-sensitive device with a ball on pointing device that is pointing device its top or side. sensitive to pressure shaped like a pencil and motion. eraser that is positioned between keys on a keyboard. 16 INPUT DEVICES - Harman Grewal
  17. 17. Touch Screens and Touch-Sensitive Pads• A touch screen is a touch-sensitive display device. 17 INPUT DEVICES - Harman Grewal
  18. 18. Pen Input• With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections. 18 INPUT DEVICES - Harman Grewal
  19. 19. Touch Screens and Touch-Sensitive PadsMicrosoft Surface • Microsoft Surface is an upcoming series of tablets designed and marketed by Microsoft. • Microsoft Surface is with a high-end graphics display that is built into something similar to a coffee table. And users interact with the applications by using only their fingers and other objects. INPUT DEVICES - Harman Grewal 19
  20. 20. Touch Screens and Touch-Sensitive Pads Touch-Sensitive Pad a specialized surface that can translate the motion and position of a users fingers to a relative position on screen. 20 INPUT DEVICES - Harman Grewal
  21. 21. Other Types of Input• Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects. Gamepad Joystick Light gun Dance Wii pad Remote 21 INPUT DEVICES - Harman Grewal
  22. 22. INPUT DEVICES - Harman Grewal 22
  23. 23. Other Types of Input• A digital camera is a mobile device that allows users to take pictures and store them digitally. Studio camera Field camera Point-and-shoot camera 23 INPUT DEVICES - Harman Grewal
  24. 24. INPUT DEVICES - Harman Grewal 24
  25. 25. Other Types of Input 25 INPUT DEVICES - Harman Grewal
  26. 26. Other Types of Input• Two factors affect the quality of digital camera photos: • Resolution refers to the number of pixels in an image. • Pixel is a tiny dot that Resolution make up the representation of an image in a computers memory. 26 INPUT DEVICES - Harman Grewal
  27. 27. Other Types of Input• Voice input is the process of entering input by speaking into a microphone.• Voice recognition is the computer’s capability of distinguishing spoken words.• Audio input is the process of entering any sound into the computer. 27 INPUT DEVICES - Harman Grewal
  28. 28. INPUT DEVICES - Harman Grewal 28
  29. 29. Other Types of Input• Music production software allows users to record, compose, mix, and edit music and sounds. 29 INPUT DEVICES - Harman Grewal
  30. 30. Other Types of Input• Video input is the process of capturing full-motion images and storing them on a computer’s storage medium. Record video on a digital video (DV) camera or use a video capture card to convert analog signals to digital. Connect the camera to a port on the system unit. Transfer video and images. 30 INPUT DEVICES - Harman Grewal
  31. 31. Video: Video Editing on Your Computer 31 INPUT DEVICES - Harman Grewal
  32. 32. Other Types of Input• A Web cam is a video camera that feeds its images in real time to a computer. It enables a user to: Send e-mail messages with video Capture video and still images attachments Add live images to instant messages Broadcast live images over the Internet Make video telephone calls 32 INPUT DEVICES - Harman Grewal
  33. 33. Other Types of Input• A video conference is a meeting between two or more geographically separated people. 33 INPUT DEVICES - Harman Grewal
  34. 34. Other Types of Input• A scanner creates a file of the document in memory. – Works in a manner similar to a copy machine. 34 INPUT DEVICES - Harman Grewal
  35. 35. Other Types of Input• Optical character recognition (OCR) involves reading characters from ordinary documents.• A turnaround document is a document you return to the company that creates and sends it. 35 INPUT DEVICES - Harman Grewal
  36. 36. Other Types of Input • Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles. 36 INPUT DEVICES - Harman Grewal
  37. 37. Other Types of Input • A bar code reader, also called a bar code scanner uses laser beams to read bar codes. 37 INPUT DEVICES - Harman Grewal
  38. 38. Other Types of Input Magnetic stripe card reader reads the magnetic stripe on the back of cards such as: Credit cards Entertainment cards Bank cards Other similar cards 38 INPUT DEVICES - Harman Grewal
  39. 39. Magnetic Stripe Cards 39 INPUT DEVICES - Harman Grewal
  40. 40. Other Types of Input• MICR (magnetic ink character recognition) devices read text printed with magnetized ink.• An MICR reader converts MICR characters into a form the computer can process.• Banking industry uses MICR for check processing. 40 INPUT DEVICES - Harman Grewal
  41. 41. Other Types of Input• Biometrics authenticates a person’s identity by verifying a personal characteristic such as: Face Hand Fingerprint Recognition Geometry Reader System System Voice Signature Verification Retinal Verification System Scanner System 41 INPUT DEVICES - Harman Grewal
  42. 42. INPUT DEVICES - Harman Grewal 42