INPUT DEVICES INPUT DEVICES Submitted by: Pradyumna Bhattarai 014BSCIT027.
INPUT AND OUTPUT. -2 Competencies Define input Describe keyboard entry, pointing devices, & scanning...
-
date post
21-Dec-2015 -
Category
Documents
-
view
239 -
download
3
Transcript of INPUT AND OUTPUT. -2 Competencies Define input Describe keyboard entry, pointing devices, & scanning...
INPUT AND OUTPUT
-2
Competencies
Define input
Describe keyboard entry, pointing devices, & scanning devices
Discuss image capturing devices, digitizing devices, & audio input devices
-3
Competencies cont.
Define output
Describe monitors, printers, and audio output devices
Discuss combination input & output devices
-4
What is Input?
Any data or instructions used by a computer
Input devicesHardware
Keyboards
Mice
Scanners
Other devices
Translates data into a form that the system unit can process
-5
Keyboard Entry
KeyboardsTraditional keyboards
Flexible keyboards
Ergonomic keyboards
Wireless keyboards
PDA keyboards
FeaturesTypewriter keyboard with numeric pad
Special purpose keys
Toggle and combination keys
-6
Traditional Keyboard
-7
Pointing Devices
MouseMechanical
Optical
Cordless or wireless
Joystick
Touch Screen
Light Pen
-8
Scanning Devices
Optical scannersFlatbed
Portable
Bar code readersHandheld wand readers or platform scanners
Contain photoelectric cells that read bar codes
-9
Scanning Devices
Character and mark recognition devices
Scanners that recognize special characters & marks
Magnetic ink character recognition (MICR)
Optical-character recognition (OCR)
Optical-mark recognition (OMR)
-10
Image Capturing Devices
Digital cameraImages recorded digitally on a disk
Images can be downloaded to a computer
Digital video camera Records motion digitally
Can take still images as well
WebCamsSpecialized digital video cameras
Broadcast images over the Internet
-11
Digitizing Devices
Graphics Tablets
Digital Notepads
-12
Audio Input Devices
VoiceVoice recognition systems
Discrete-speech recognition systems
Continuous-speech recognition system
MusicMusical Interface Digital Interface (MIDI)
-13
What is Output?
Processed data or information
Types of outputText
Graphics
Audio & video
Output devicesMonitors
Printers
-14
Monitors
Known as screens or display screens
Output referred to as soft copy
Features Resolution
Dot pitch
Refresh rate
Size
-15
More on Monitors
Cathode-ray tube or CRTs
Flat-panelLiquid crystal display (LCD)
Portable and thinner than CRTs
Other monitorsE-books
Data projectors
High-definition television (HDTV)
-16
Printers
Translates information that has been processed by the system unit
Output referred to as hard copy
FeaturesResolution
Color capability
Speed
Memory
-17
Printers
Ink-jet printer
Laser printerPersonal laser printers
Shared laser printers
Thermal printer
Other printersDot-matrix
Plotters
Photo printers
-18
Audio Output Devices
Translates audio information into sounds that people can understand
Common devicesSpeakers
Headphones
-19
Combination Input and Output Devices
Fax machines
Multifunction devices
Internet telephonesTelephony
Voice-over IP (VoIP)
Terminals
-20
Terminals
An input and output device
Connects to a mainframe or server
Types of terminalsDumb terminal
Intelligent terminal
Network terminal
Internet terminal
-21
A Look to the FutureNeural Signals Inc.
Brain machine interface
Allows humans to control machines with their thoughts
Individuals incapable of communication
Physically immobile people
-22
FAQs
What are pointing devices?
I would like to insert several images in a document. How can I capture the images?
What are digitizing devices?
What is voice recognition?
What is the difference between a CRT and an LCD display?
What is HDTV?
-23
Discussion Questions
Describe the three different mouse types designed for input.
How does Internet telephony work? Discuss.
Discuss the features of multifunctional devices.
Describe the features of a monitor that help to make images appear clearer on the screen.
What are MIDI devices and how are they used?