Saidmuratov Bobur Input Devices

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Input Devices

• Input device captures information and translates it into a form that can be processed and used by other parts of your computer.

Keyboards

Pointing devices

Game controllers

Scanners

Styluses

Microphones

Digital cameras

Web cams

 The keyboard is the most common input device. Types of keyboards include:

• Wireless
• Multimedia and one-touch access
• Portable keyboards for PDAs

Types of Input Devices

Pointing Devices

 Various pointing devices are available

 Types of pointing devices:

• Mouse

Mechanical mouse

Optical mouse

Wireless mouse


• Trackball
• Touchpad
• Pointing stick

Game Controller

 Game controllers are used mainly to play games

 Types of gaming devices

• Gamepads
• Joysticks
• Gaming wheels
• Force feed

Specialized Input Devices

 Other types of input devices include:

• Scanners
• Styluses
• Microphones
• Digital cameras
• Web cams

Scanner

• Scanner is a light sensitive device that helps you copy or capture images, photos, and artwork that exist on paper. Types of scanners include:

Flatbed

Styluses

• Stylus is an input device consisting of a thin stick that uses pressure to enter information or to click and point
• Styluses are used with:

PDAs

Tablet PCs

Graphics tablets

Microphones

• Microphones are used to input audio
• Three main types of microphones are:

Desktop microphones

Headsets

Directional microphones


• Speech recognition is increasingly being included in application software

Output Devices

 Output devices take information within your computer and present it to you in a form that you can understand

 Main output devices:

 Monitors

 Printers

 Speakers

Flat Panel Display Devices

 Devices with flat-panel displays

• Tablet PCs
• PDAs
• Cellular phones
• Desktop computers

Monitors

 CRTs

 Flat-panel displays

 Gas plasma

 LCD (liquid crystal display)

 Passive matrix

 Active matrix

 Called TFT (thin film transistor)

 Separate transistor for every pixel

Printers

 Inkjet – most popular

 Makes images by forcing droplets through nozzles

 Top speed is 20 pages per minute

 Laser

 Forms images using an electrostatic process

 Prints between 3 and 30 pages per minute

Speakers

 A speaker is a device that produces computer output as sound

 Speakers are common devices in computer systems Examples include:

• Built-in speaker
• Two-device set speakers
• Surround sound speakers