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Input
Devices

      INPUT DEVICES - Harman Grewal   1
What Is Input?

• Input is any data and instructions entered into the
  memory of a computer.




                                                    2
                    INPUT DEVICES - Harman Grewal
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
Keyboard




                                           4
           INPUT DEVICES - Harman Grewal
Keyboard

• Most desktop computer keyboards have…




                                                  5
                  INPUT DEVICES - Harman Grewal
INPUT DEVICES - Harman Grewal   6
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
Keyboard Types

2. 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
Keyboard Types

 QWERTY keyboard                  DVORAK keyboard




                                                    9
                   INPUT DEVICES - Harman Grewal
Connection Keyboards
1. Wireless Keyboards
These 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
Connection Keyboards




   Bluetooth



                  Infrared



                                               Radio Frequency
                                                                 11
               INPUT DEVICES - Harman Grewal
Connection Keyboards
2. 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
Connection Keyboards




               INPUT DEVICES - Harman Grewal   13
Pointing Devices




                                               14
               INPUT DEVICES - Harman Grewal
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
Pointing Devices




                                      Touchpad




                                                                              Pointing Stick
                                                 • A touchpad is a                             • A pointing stick is a
Trackball




            • 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
Touch Screens and Touch-Sensitive Pads

• A touch screen is a touch-sensitive display device.




                                                     17
                     INPUT DEVICES - Harman Grewal
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
Touch Screens and Touch-Sensitive Pads
Microsoft 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
Touch Screens and Touch-Sensitive Pads
 Touch-Sensitive Pad

                                 a specialized surface that
                                 can translate the motion
                                 and position of a user's
                                 fingers to a relative
                                 position on screen.




                                                              20
                  INPUT DEVICES - Harman Grewal
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
INPUT DEVICES - Harman Grewal   22
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
INPUT DEVICES - Harman Grewal   24
Other Types of Input




                                               25
               INPUT DEVICES - Harman Grewal
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 computer's
                                     memory.


                                                             26
                        INPUT DEVICES - Harman Grewal
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
INPUT DEVICES - Harman Grewal   28
Other Types of Input

• Music production software allows users to
  record, compose, mix, and edit music and sounds.




                                                   29
                   INPUT DEVICES - Harman Grewal
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
Video: Video Editing on Your Computer




                                               31
               INPUT DEVICES - Harman Grewal
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
Other Types of Input

• A video conference is a meeting between two or
  more geographically separated people.




                                                   33
                   INPUT DEVICES - Harman Grewal
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
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
Other Types of Input

 • Optical mark recognition (OMR) reads hand-drawn
   marks such as small circles or rectangles.




                                                     36
                   INPUT DEVICES - Harman Grewal
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
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
Magnetic Stripe Cards




                                               39
               INPUT DEVICES - Harman Grewal
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
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
INPUT DEVICES - Harman Grewal   42

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Input Devices

  • 1. Input Devices INPUT DEVICES - Harman Grewal 1
  • 2. What Is Input? • Input is any data and instructions entered into the memory of a computer. 2 INPUT DEVICES - Harman Grewal
  • 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. Keyboard 4 INPUT DEVICES - Harman Grewal
  • 5. Keyboard • Most desktop computer keyboards have… 5 INPUT DEVICES - Harman Grewal
  • 6. INPUT DEVICES - Harman Grewal 6
  • 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. Keyboard Types 2. 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. Keyboard Types QWERTY keyboard DVORAK keyboard 9 INPUT DEVICES - Harman Grewal
  • 10. Connection Keyboards 1. Wireless Keyboards These 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. Connection Keyboards Bluetooth Infrared Radio Frequency 11 INPUT DEVICES - Harman Grewal
  • 12. Connection Keyboards 2. 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. Connection Keyboards INPUT DEVICES - Harman Grewal 13
  • 14. Pointing Devices 14 INPUT DEVICES - Harman Grewal
  • 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. Pointing Devices Touchpad Pointing Stick • A touchpad is a • A pointing stick is a Trackball • 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. Touch Screens and Touch-Sensitive Pads • A touch screen is a touch-sensitive display device. 17 INPUT DEVICES - Harman Grewal
  • 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. Touch Screens and Touch-Sensitive Pads Microsoft 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. Touch Screens and Touch-Sensitive Pads Touch-Sensitive Pad a specialized surface that can translate the motion and position of a user's fingers to a relative position on screen. 20 INPUT DEVICES - Harman Grewal
  • 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. INPUT DEVICES - Harman Grewal 22
  • 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. INPUT DEVICES - Harman Grewal 24
  • 25. Other Types of Input 25 INPUT DEVICES - Harman Grewal
  • 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 computer's memory. 26 INPUT DEVICES - Harman Grewal
  • 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. INPUT DEVICES - Harman Grewal 28
  • 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. 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. Video: Video Editing on Your Computer 31 INPUT DEVICES - Harman Grewal
  • 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. Other Types of Input • A video conference is a meeting between two or more geographically separated people. 33 INPUT DEVICES - Harman Grewal
  • 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. 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. Other Types of Input • Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles. 36 INPUT DEVICES - Harman Grewal
  • 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. 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. Magnetic Stripe Cards 39 INPUT DEVICES - Harman Grewal
  • 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. 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. INPUT DEVICES - Harman Grewal 42