Hardware Components <ul><li>Input Devices </li></ul><ul><li>Output Devices </li></ul>
Input Devices  - Consist devices that translate data into a form the computer can process <ul><li>Keyboard  </li></ul><ul>...
TRADITIONAL KEYBOARD SPECIALTY KEYBOARD
Pointing devices Control the position of the cursor or pointer on the screen 1. mouse and its variants:
<ul><li>trackball  – a movable ball, mounted on top of a stationary device, that can be rotated using your fingers or palm...
<ul><li>pointing stick  – looks like a pencil eraser protruding from the keyboard between G, H, and B keys </li></ul>
<ul><li>touch pad  – a small, flat surface over which you slide your finger </li></ul>
<ul><li>2. touch screen – a video display screen that has been sensitized to received input from the touch of a finger </l...
3.  Pen Input:   <ul><li>Pen-based computer system  – allows users  to enter handwriting and mark onto a computer screen b...
<ul><li>Light pen  – a light-sensitive penlike device connected by a wire to the computer terminal </li></ul>
<ul><li>Digitizer  – uses a mouselike copying device called a puck, or an electronic pen, which can convert drawings and p...
Source Data-Entry Devices Data are entered directly from the source. It creates machine-readable data on magnetic media or...
b.  Bar-code reader
c.  Mark-recognition  and  Character-recognition  devices.  c.1  Magnetic-ink character recognition  (MICR)
c.2  Optical-mark recognition  (OMR)
c.3  Optical-character recognition  (OCR)
d.  Fax machines d.1  Dedicated fax machines d.2  Fax modem
Source Data-Entry Devices 2.  Webcam  – a camera that attaches to a computer to record moving images that can then be post...
3.  Digital cameras  – electronic camera that uses a light-sensitive processor chip to capture photographic  images in dig...
4.  Human biology-input devices . Characteristics and movements of the human body, when interpreted by sensors, optical sc...
Output Devices Consists of devices that convert machine-readable information, obtained as a result of processing, into peo...
Softcopy <ul><li>a.  Display   screen  – also called as monitors </li></ul><ul><li>2 Types </li></ul><ul><li>a.1  Cathode-...
<ul><li>a.2  Flat-panel displays  are made up of two plates of glass separated by a layer of a substance in which light is...
Hardcopy <ul><li>a .  Impact Printer- forms characters or images by striking a mechanism such as a print hammer or wheel a...
b. Nonimpact Printers form characters and images without direct physical contact between the printing mechanism and paper....
b.2 Ink-jet Printer
b.3 Bubble-jet Printer
b.4 Thermal Printer
c. Plotters.  3 Types c.1 Pen
c.2 Electrostatic
c.3 Large-format
d. Multifunction
Other Output: Sound, Voice, and Video   <ul><li>1. Sound Output devices – produce digitized sounds, ranging from beeps and...
<ul><li>2. Voice Output Devices – convert digital data into speech-like sounds. (ex. in telephone answering machine, cars,...
<ul><li>3. Video Output – video consists of photographic images, which are played at 15-29 frames per second to give the a...
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Cs100 lec 3 cont2 hardware input & output )

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Cs100 lec 3 cont2 hardware input & output )

  1. 1. Hardware Components <ul><li>Input Devices </li></ul><ul><li>Output Devices </li></ul>
  2. 2. Input Devices - Consist devices that translate data into a form the computer can process <ul><li>Keyboard </li></ul><ul><li>is a device that converts letters, numbers, and other characters into electrical signals that can be read by the computer’s processor. </li></ul>2 types 1. Traditional computer keyboard (104 - 105 keys) 2. Specialty keyboards and terminals (touch tone telephone keypads to keyboards featuring pictures of food for use in fast-food restaurants
  3. 3. TRADITIONAL KEYBOARD SPECIALTY KEYBOARD
  4. 4. Pointing devices Control the position of the cursor or pointer on the screen 1. mouse and its variants:
  5. 5. <ul><li>trackball – a movable ball, mounted on top of a stationary device, that can be rotated using your fingers or palm </li></ul>
  6. 6. <ul><li>pointing stick – looks like a pencil eraser protruding from the keyboard between G, H, and B keys </li></ul>
  7. 7. <ul><li>touch pad – a small, flat surface over which you slide your finger </li></ul>
  8. 8. <ul><li>2. touch screen – a video display screen that has been sensitized to received input from the touch of a finger </li></ul>
  9. 9. 3. Pen Input: <ul><li>Pen-based computer system – allows users to enter handwriting and mark onto a computer screen by means of a penlike stylus rather than typing on a keyboard (ex. handheld and digital notebook) </li></ul>
  10. 10. <ul><li>Light pen – a light-sensitive penlike device connected by a wire to the computer terminal </li></ul>
  11. 11. <ul><li>Digitizer – uses a mouselike copying device called a puck, or an electronic pen, which can convert drawings and photos to digital data. (ex. digitizing tablet) </li></ul>
  12. 12. Source Data-Entry Devices Data are entered directly from the source. It creates machine-readable data on magnetic media or paper or feed it directly into the computer’s processor <ul><li>1. Scanning devices . Scanners use light-sensing equipment to translate images of text, drawings, photos, and the like into digital forms. </li></ul><ul><li>a. Imaging System </li></ul>
  13. 13. b. Bar-code reader
  14. 14. c. Mark-recognition and Character-recognition devices. c.1 Magnetic-ink character recognition (MICR)
  15. 15. c.2 Optical-mark recognition (OMR)
  16. 16. c.3 Optical-character recognition (OCR)
  17. 17. d. Fax machines d.1 Dedicated fax machines d.2 Fax modem
  18. 18. Source Data-Entry Devices 2. Webcam – a camera that attaches to a computer to record moving images that can then be posted on a website in real time
  19. 19. 3. Digital cameras – electronic camera that uses a light-sensitive processor chip to capture photographic images in digital form on a small diskette inserted in the camera or on flash-memory chip.
  20. 20. 4. Human biology-input devices . Characteristics and movements of the human body, when interpreted by sensors, optical scanners, voice recognition, and other technologies, can be form of input. a. Biometric system . b. Line of sight systems VOICE RECOGNITION FINGER SCANNER HAND SCANNER EYE SCANNER
  21. 21. Output Devices Consists of devices that convert machine-readable information, obtained as a result of processing, into people-readable form <ul><li>2 types </li></ul><ul><li>1. Softcopy – data that is shown on a display screen or is in audio or voice form </li></ul><ul><li>2. Hardcopy – printed output </li></ul><ul><li>Other Outputs </li></ul>
  22. 22. Softcopy <ul><li>a. Display screen – also called as monitors </li></ul><ul><li>2 Types </li></ul><ul><li>a.1 Cathode-Ray Tube (CRT)- is a vacuum tube used as a display screen in a computer or video display terminal </li></ul>
  23. 23. <ul><li>a.2 Flat-panel displays are made up of two plates of glass separated by a layer of a substance in which light is manipulated (ex. Liquid crystal display (LCD) </li></ul>
  24. 24. Hardcopy <ul><li>a . Impact Printer- forms characters or images by striking a mechanism such as a print hammer or wheel against an inked ribbon. (ex. Dot matrix) </li></ul>
  25. 25. b. Nonimpact Printers form characters and images without direct physical contact between the printing mechanism and paper. 3 Types b.1 Laser Printer
  26. 26. b.2 Ink-jet Printer
  27. 27. b.3 Bubble-jet Printer
  28. 28. b.4 Thermal Printer
  29. 29. c. Plotters. 3 Types c.1 Pen
  30. 30. c.2 Electrostatic
  31. 31. c.3 Large-format
  32. 32. d. Multifunction
  33. 33. Other Output: Sound, Voice, and Video <ul><li>1. Sound Output devices – produce digitized sounds, ranging from beeps and chirps to music. (ex. speaker) </li></ul>
  34. 34. <ul><li>2. Voice Output Devices – convert digital data into speech-like sounds. (ex. in telephone answering machine, cars, toys and games) </li></ul>
  35. 35. <ul><li>3. Video Output – video consists of photographic images, which are played at 15-29 frames per second to give the appearance of full motion. </li></ul>

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