Computer system Input Devices Peripherals
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Computer system Input Devices Peripherals
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Computer system Input Devices Peripherals
- 1. 1 Chapter 3 Input Devices C. P. Divate
- 2. Computing Basics 2 Input Devices Topics: • Input Devices • Examples of Input Device • Keyboard • Pointing Devices • Graphic and Video Input Devices • Audio Input Devices
- 3. Computing Basics 3 Input Devices Input Devices • Any peripheral (piece of computer hardware equipment) used to provide data and control signals to a computer. • Allows the user to put data into the computer. • Without any input devices, a computer would only be a display device and not allow users to interact with it.
- 4. Computing Basics 4 Input Devices Examples of Input Device • Keyboard • Mouse • Touchscreen • Graphic tablet • Microphone • Scanner
- 5. Computing Basics 5 Input Devices Keyboard • One of the primary input devices used with a computer. • The keyboard looks very similar to the keyboards of electric typewriters, with some additional keys. • Keyboards allow a computer user to input letters, numbers, and other symbols into a computer • Uses an arrangement of buttons or keys. • Requires pressing and holding several keys simultaneously or in sequence.
- 7. Computing Basics 7 Input Devices Types of Keyboard • Standard • Laptop • Gaming and Multimedia • Thumb-sized • Virtual • Foldable
- 8. Computing Basics Input Devices Types of Keyboard Standard • Desktop computer keyboards, such as the 101-key US traditional keyboards or the 104-key Windows keyboards, include alphabetic characters, punctuation symbols, numbers and a variety of function keys. 8
- 9. Computing Basics Input Devices Types of Keyboard Laptop Keyboard • The laptop computer keyboard is a small version of the typical QWERTY keyboard. • A typical laptop has the same keyboard type as a normal keyboard, except for the fact that most laptop keyboards condense the symbols into fewer buttons to accommodate less space. 9
- 10. Computing Basics Input Devices Types of Keyboard Gaming and Multimedia Keyboard • The gaming keyboards are designed for the convenience of the gamers and these types of keyboards provide the required controls on the keyboards like back lighting. 10
- 11. Computing Basics Input Devices Types of Keyboard Thumb-sized keyboard • Smaller external keyboards have been introduced for devices without a built-in keyboard, such as PDAs, and smartphones. • Small keyboards are also useful where there is a limited workspace. 11
- 12. Computing Basics 12 Input Devices Types of Keyboard Virtual Keyboard • The virtual keyboards are not actually physical keyboards, but they are simulated using a software.
- 13. Computing Basics Input Devices Types of Keyboard Foldable Keyboard • Foldable keyboards are extremely good for travelling. • Simply roll them up and then unroll them when you need them again. 13
- 14. Computing Basics 14 Input Devices Keyboard Layouts • QWERTY • QWERTZ • AZERTY • DVORAK
- 15. Computing Basics Input Devices Keyboard Layouts QWERTY • Common layout 15
- 16. Computing Basics Input Devices Keyboard Layouts QWERTZ • Used in Germany, Hungary and Czech Republic 16
- 17. Computing Basics Input Devices Keyboard Layouts AZERTY • It is used by most French speakers based in Europe 17
- 18. Computing Basics Input Devices Keyboard Layouts DVORAK • Alternative for QWERTY • Dvorak layout uses less finger motion, increases typing rate, and reduces errors compared to the standard QWERTY 18
- 19. Computing Basics 19 Input Devices Key Types Key Type Example Alphanumeric A-Z, 0-9 Punctuation . , ! “ ? Modifiers Shift, Space Bar, Enter, Ctrl, Alt Navigation Arrows, Home, Page Up System Command PrtScn, Esc, F1, Start
- 20. Computing Basics 20 Input Devices Key Types Function keys • The Function keys or F1 through F12 keys are used in programs as shortcut keys to performed frequently performed tasks. • For example, the F1 key is the key to open the online help for most programs.
- 21. Computing Basics 21 Input Devices Key Types Control Keys • The Control keys are what give you additional control of a document.
- 22. Computing Basics 22 Input Devices Key Types Keypad • Although not available on all computer keyboards, especially laptops; the keypad gives the user a quick access to numbers and math functions such as plus, divide, times, and subtract.
- 23. Computing Basics 23 Input Devices Key Types Arrow keys • The arrow keys are four directional arrow keys that allow the user to move their cursor and position on a page.
- 24. Computing Basics 24 Input Devices Keyboard Shortcut Keys Shortcut Keys Description Alt + F File menu options in current program. Alt + E Edit options in current program F1 Universal Help in almost every Windows program. Ctrl + A Select all text. Ctrl + X Cut selected item. Shift + Del Cut selected item. Ctrl + C Copy selected item. Ctrl + Ins Copy selected item Ctrl + V Paste Shift + Ins Paste Ctrl + P Print the current page or document. Home Goes to beginning of current line. Ctrl + Home Goes to beginning of document. End Goes to end of current line. Ctrl + End Goes to end of document. Shift + Home Highlights from current position to beginning of line. Shift + End Highlights from current position to end of line. Ctrl + Left arrow Moves one word to the left at a time. Ctrl + Right arrow Moves one word to the right at a time.
- 25. Computing Basics 25 Input Devices Pointing Devices • A pointing device is a hardware input device that allows the user to move the mouse pointer to select items on a display screen. • Types of pointing device: – Based on rolling a ball – Based on touching a surface – Based on moving stick
- 26. Computing Basics 26 Input Devices Pointing Devices Based on rolling a ball • Example: – Mouse – Trackball
- 27. Computing Basics Input Devices Pointing Devices Mouse • A device that controls the movement of the cursor or pointer on a display screen. • The mouse is important for graphical user interfaces because user can simply point to options and objects and click a mouse button. 27
- 28. Computing Basics Input Devices Pointing Devices Type of Mouse • Mechanical: Has a rubber or metal ball on its underside that can roll in all directions. • Optical: Uses a laser to detect the mouse's movement. 28
- 29. Computing Basics Input Devices Pointing Devices Trackball • A trackball is a mouse lying on its back. • To move the pointer, you rotate the ball with your thumb, your fingers, or the palm of your hand • It does not require much space to use it 29
- 30. Computing Basics 30 Input Devices Pointing Devices Based on touching a surface • Example: – Touchpad – Graphic tablet – Touch screen – Light pen – Stylus
- 31. Computing Basics Input Devices Pointing Devices Touchpad • A small, touch-sensitive pad used as a pointing device on some portable computers. • By moving a finger or other object along the pad, you can move the pointer on the display screen. 31
- 32. Computing Basics Input Devices Pointing Devices Graphic Tablet • A graphics tablet (or digitizer, digitizing tablet, graphics pad, drawing tablet) is a computer input device that allows one to hand- draw images and graphics, similar to the way one draws images with a pencil and paper. 32
- 33. Computing Basics Input Devices Pointing Devices Touchscreen • A touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area. • The term generally refers to touching the display of the device with a finger or hand. 33
- 34. Computing Basics Input Devices Pointing Devices Light Pen • A light pen is a computer input device in the form of a light- sensitive wand used in conjunction with a computer's CRT display. • It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. 34
- 35. Computing Basics 35 Input Devices Pointing Devices Stylus • A stylus is a small pen-shaped instrument that is used to input commands to a computer screen, mobile device or graphics tablet.
- 36. Computing Basics 36 Input Devices Pointing Devices Based on moving stick • Example: – Joystick – Gamepad
- 37. Computing Basics Input Devices Pointing Devices Joystick • A joystick allows an individual to move an object in a game such as navigating a plane in a flight simulator. 37
- 38. Computing Basics Input Devices Pointing Devices Gamepad • A gamepad, game controller, joypad, or video game controller is a peripheral device designed to be connected to a computer or console gaming system. • It has multiple buttons and may have one or two mini joysticks. 38
- 39. Computing Basics 39 Input Devices Imaging and Video Input Devices • Used to digitize images or video from the outside world into the computer. • Example: – Digital camera – Webcam – Optical scanner – 3D scanner – Fingerprint scanner – Barcode reader
- 40. Computing Basics Input Devices Imaging and Video Input Devices Digital Camera • A camera that stores the pictures or video it takes in electronic format instead of to film. • Digital cameras have become the camera solution for most users today as the quality of the picture they take has greatly improved and as the price has decreased. 40
- 41. Computing Basics Input Devices Imaging and Video Input Devices Webcam • A webcam is a hardware camera connected to a computer that allows anyone connected to the Internet to view either still pictures or motion video of a user or other object. 41
- 42. Computing Basics 42 Input Devices Imaging and Video Input Devices Optical Scanner • An optical scanner is a hardware input device that allows a user to take an image or text and convert it into a digital file, allowing the computer to read or display the scanned object. • Two types of scanner: – Flatbed – Hand-held
- 43. Computing Basics Input Devices Imaging and Video Input Devices Image Scanner Flatbed Scanner Hand-held Scanner 43
- 44. Computing Basics 44 Input Devices Imaging and Video Input Devices Image Scanner Flatbed Scanner Handheld Scanner Flatbed scanners look similar to a small photocopier with the document remaining flat and stationary during the scanning Hand-held scanners are used for entering text and images that are less than a page wide. Hand- held scanners are adequate for small pictures and photos but are difficult for entire pages.
- 45. Computing Basics Input Devices Imaging and Video Input Devices 3D Scanner • A 3D scanner is a device that analyzes a real-world object or environment to collect data on its shape and possibly its appearance (i.e. color). • The collected data can then be used to construct digital, three dimensional models. 45
- 46. Computing Basics Input Devices Imaging and Video Input Devices Fingerprint Scanner • A fingerprint scanner or fingerprint reader is a hardware device that verifies a user or enters password information by scanning their finger. 46
- 47. Computing Basics Input Devices Imaging and Video Input Devices Barcode Reader • A barcode reader or scanner is a hardware device capable of reading a barcode and printing out the details of the product or logging that product into a database. 47
- 48. Computing Basics 48 Input Devices Audio Input Devices • Audio input devices allow a user to send audio signals to a computer for processing, recording, or carrying out commands. • Example: – Microphone – MIDI keyboard
- 49. Computing Basics Input Devices Audio Input Devices Microphone • A microphone is a hardware peripheral that allows computer users to input audio into their computers. 49
- 50. Computing Basics 50 Input Devices Audio Input Devices MIDI Keyboard • A MIDI (Musical Instruments Digital Interface) keyboard is typically a piano-style user interface keyboard device used for sending MIDI signals to a computer. • MIDI information is sent to a computer that capable of reproducing an array of digital sounds or samples that resemble traditional analog musical instruments.
- 51. Computing Basics Input Devices Audio Input Devices MIDI Keyboard 51