INPUT AND OUTPUT (CHAPTER 3)

Input Devices

Biometrics Authenticates Devices

Output Devices

Monitors

Printers

Audio and Video Devices

Combination of Input and Output Devices

Protecting Hardware

Ergonomics and Health Issues

transform what we comprehend into a form that the system unit can understand​

transform the results of the system unit's processing into a language that we can understand.​

Translate data into a form that the system unit

hardware input devices: Keyboards, Mice, Pointing, Scanning, Image Capturing and Audio Input

Input: Any data or instructions used by a computer​

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

Wireless

Touch

Has no moving parts​

Emits and senses light

Can be used on any surface

Battery operated

Uses radio waves or infrared light waves​

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.

Image Capturing Devices​

Create or capture original images: Digital camera and web cams

Audio-Input Devices: Voice recognition systems​

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

Types of output: Text, graphic, audio and video

Output devices: Monitors, printers, Audio output

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. ​

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​

ink-jet printer: forms characters and graphics by spraying tiny drops of liquid ink

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

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.

Translates audio information from ​ the computer into sounds that people can understand​

Headsets

Multifunctional devices (MFD)​

Telephones

Ergonomic is an applied science devoted to incorporating comfort, efficiency, and safety into the design of items in the workplace​