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INPUT AND OUTPUT (CHAPTER 3) - Coggle Diagram
INPUT AND OUTPUT (CHAPTER 3)
Input Devices
transform what we comprehend into a form that the system unit can understand
Translate data into a form that the system unit
hardware input devices: Keyboards, Mice, Pointing, Scanning, Image Capturing and Audio Input
Keyboards
Traditional
Laptop
Virtual
Thumb
Pointing Devices
Provide an intuitive interface
Converting them into machine-readable input
Wide variety: mouse, touch screen, game controller, stylus
Mice
Optical
Has no moving parts
Emits and senses light
Can be used on any surface
Wireless
Battery operated
Uses radio waves or infrared light waves
Touch
Controls pointer by moving and tapping your fingers
Touch screen
Can be touched with more than one finger
Common on mobile devices: Notebook computer
Stylus is a pen-like device that used in tablet
Gaming Controllers
.
Provide input to computer games
Joysticks use pressure and direction of the stick
Gaming mice are similar to a mouse but high precision
Game pads use both hands
Motion sensing device control games by user movement
Scanning Devices
Scanners convert scanned data into a form
the system unit can process
Optical Scanner
.
Flatbed scanners
Document scanners
Portable scanners
3D scanners
Card Reader: Interpret encoded information that is stored on debit, credit and identification cards
Magnetic card reader
-Information read from strip when swiped through reader
-Smart cards hold additional security information
Bar code readers: Contain photo-electric cells that scan or read bar codes, or the zebra striped marks
Wand readers
UPCs and MaxiCode readers
RFID Readers: Tiny chips embedded (tags) in most anything (object) contain electronically stored information
RFID can track
Tracking times
Tracking location
Checking lift tickets
Character and Mark Recognition Readers
Magnetic-ink character recognition (MICR)
Optical-character recognition (OCR)
Optical-mark recognition (OMR)
NFC Reader: that defines how a network uses close-range radio signals to communicate
standards developed primarily for smartphones for two-way communication between the device and tag by bringing them close to one another.
NFC tags, may be purchased and programmed to do anything you want.
Input: Any data or instructions used by a computer
Image Capturing Devices
Create or capture original images: Digital camera and web cams
Audio-Input Devices: Voice recognition systems
Biometrics Authenticates Devices
A biometric device authenticates a person’s identity by translating a personal characteristic into a digital code
Biometrics scanner: can scan a person's fingerprint, voice, face, hand, iris, and retina.
Unauthorized Access and Use: face scanner, finger scanner, hand scanner, iris scanner and more
Output Devices
Monitors
Known as screens or display screens and present visual images of text and graphics
Features:
Clarity
Resolution/pixels
Dot pitch
Monitor types: Flat panel monitors, Liquid Crystal Display (LCD),Light Emitting Diode (LED), Organic Light Emitting Diode (OLED)
Curved Monitors: Has a concave screen that provides better viewing angles
E-book Readers: dedicated mobile devices for storing and displaying e-books
Other Output Displays
DTVs and Smart TVs
High-definition television (HDTV)
Smart Television
Other Output Displays:
a device that projects the text and images displaying on a computer or mobile device screen
interactive whiteboard is a touch-sensitive device,
Flexible screens allow digital devices to display images on nonflat surfaces.
Printers
Translates information that has been processed by the system unit
produces text and graphics on a physical medium
Features:
Resolution
Color
Speed
Type of printers
Non-impact printer: forms characters and graphics on a piece of paper without striking the paper
Photo printers are specifically designed to create photographs that rival any 35mm film print.
Laser printers uses a laser light beam to produce images: fast and excellent quality
ink-jet printer: forms characters and graphics by spraying tiny drops of liquid ink
thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper
mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print wirelessly
Plotters are special-purpose printers for producing a wide range
Large-format printers create photo-realistic quality color prints on a larger scale
Impact printer: characters and graphics on a piece of paper by striking a mechanism
dot-matrix printer produces printed images when tiny wire pins on a print head mechanism
Line printer a machine that prints output from a computer a line
daisy-wheel printer works on the same principle as a ball-head typewriter.
Audio and Video Devices
Translates audio information from the computer into sounds that people can understand
transform the results of the system unit's processing into a language that we can understand.
Types of output: Text, graphic, audio and video
Output devices: Monitors, printers, Audio output
Combination of Input and Output Devices
Headsets
Multifunctional devices (MFD)
Telephones
Protecting Hardware
Ergonomics and Health Issues
Ergonomic is an applied science devoted to incorporating comfort, efficiency, and safety into the design of items in the workplace