This document discusses various computer input devices. It describes audio visual devices like scanners, digital cameras, and webcams that can input images and video. Optical devices for data storage are discussed like CD-ROMs, DVDs, and drives. Pointing devices are also covered, including mice, joysticks, touchpads, keyboards, and touchscreens. For each device type, examples are given and their functions and advantages/disadvantages are summarized. The document aims to inform the reader about different types of hardware that can provide data and input to computers.

1. SUMMER ASSIGNMENT RESEARCH WORK OF COMPUTER

2. TOPIC : INPUT DEVICES BY SYEDA FIZZA RIZVI IX-C

4. OPTICAL DEVICES

6. AUDIO VISUAL DEVICES audio-visual refer to works with both a sound and a visual component, the production or use of such works, or to equipment used to create and present such works. Slide tape presentation, films and television program are examples of audio-visual presentations.

8. VIDEO CAMERA.

9. WEB CAMERA.

10. MICROPHONE.

12. Create a full color image-excellent for inputting photographs.

13. The number of pixels can be adjusted to suit the image being taken.

15. . Microphone to capture sound

16. WEB CAMERA A webcam is short for 'web camera'. A webcam is an input device because it captures a video image of the scene in front of it. It is either built in to the computer (e.g. laptop) or it is connected through an USB cable. The video data from a web cam is low quality compared to a full video camera. However it is good enough for web chats (e.g. using a messenger application such as MSN Messenger or Skype).

17. MICRO PHONE A microphone can be used to input sound. The sound is detected by the microphone and an electrical signal is transmitted to the computer. Special hardware is used to convert this analogue data into digital data so it can be stored and manipulated. Dictating like this can be much quicker than typing but the software isn't perfect and it can interpret a word incorrectly.

21. CD-ROM drive

22. ATA/IDE

23. EIDE

25. CD – ROM DRIVE A CD-ROM drive is a device that can read information from a Compact disc. CD-ROM drives can be either internal, in which case they fit in a drive bay, or external, in which case they are usually connected to the computer’s parallel port or SCSI port. you should consider how the drive connects to your computer. Most CD-ROMs connect via a SCSI bus. If your computer does not already contain such an interface, you will need to install one.

26. ATA/IDE ATA (Advanced Technology Attachment) and IDE (Integrated Drive Electronics) both refer to disk drive designs that integrate the controller into the drive to reduce the interface cost and to ease firmware implementation. ATA/IDE HARD DISK

27. EIDE EIDE, short for Enhanced IDE, is a new version of the IDE mass storage device interface standard developed by Western Digital Corporation it can support mass storage devices of up to 8.4 gigabytes per device, whereas the old standard was limited to 528MB. Because of its lower cost, enhanced IDE is expected to replace SCSI in many areas.

28. DVD (DIGITAL VERSATILE DISK) DVD, short for Digital Versatile Disk, is the newest standard for optical storage, which specifies a disk that is the same size as a standard CD but is able to hold much more information. The main attraction for PC users is the larger capacity of the DVD disk. The capacity will be 17gig on a double-sided dual layer disk, 8 gig on a single sided dual layer, and 8.4 gig on a CD-R which only be single layer but could be double or single sided. The PC will also be able to play DVD-Audio and DVD-Video; two standards developed primarily for home electronics devices. New ROM drives, called DVD-ROM, will be arriving on the market to accommodate the new disk format.

30. Joystick.

31. Touch pad.

32. Key board.

34. ADVANTAGES/DISADVANTAGES DISADVANTAGES ADVANTAGES

35. joystick Joysticks were originally used by pilots as part of an airplane's controls and the technology was developed to let computer gamers experience a more realistic game environment. You can move joysticks in many directions and the joystick tells the computer which direction it has been moved into. They also have one or more buttons whose position when pushed can be read by the computer. Joysticks can also be used for controlling Machines such as cranes, trucks and Powered wheel chairs.

38. ADVANTAGES/DISADVANTAGES ADVANTAGE DISADVANTAGE

39. KEY BOARD The keyboard is the most common and widely used input device. It is excellent for inputting text into a document. Most keyboards are called 'QWERTY' keyboards. This name comes from the first six letters on the top row of the alphabet keys. Using a keyboard for too long can lead to health problems such as repetitive strain injury (RSI). To try to overcome this, different styles of keyboard have been developed, for example, the ergonomic keyboard. They are supposed to put your hands into a much more natural position than a traditional keyboard.

41. If you can't touch type, it can be time consuming to enter data

42. Keyboards are not suitable for creating diagrams

43. Disabled people often find keyboards difficult to use

46. No extra peripherals such as a mouse are needed

48. Not very accurate - selecting detailed objects can be difficult with fingers

49. Tiring to use for long periods

50. More expensive than alternatives such as a mouse

51. Not robust - can soon become faulty if misused.

53. Joystick

54. Touchpad

55. Key board

56. Touch screen

57. Scanner

58. Digital Camera

59. Web Camera

60. Micro phone

61. Graphic Tablet

62. CD-ROM

63. CD-ROM Drive

64. EIDE

65. DVD

66. ATA/IDEWith advan/disadvantages…

67. IMAGES

68. REFRENCE : INFORMATION : www.Teach-ict.com IMAGES : www.Googleimages.com