CONTENTS
•Introduction
•Input Devices
–Keyboard,mouse,joystick,scanners,digital
camera, bar code reader, touch
Sreeen,Speech input device (microphone)
•Output Devices
–Monitor , Speaker, Printers ( different
types)
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Input Devices - Computer Fundamentals - Lecture Slides, Slides of Computer Science
These are the Lecture Slides of Computer Fundamentals which includes Access and Databases, Relational Database, Components of Database, Program for Creating, Store of Information, Relational Version, Access Environment, File Location etc. Key important points are: v
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2012/2013
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CONTENTS
- Introduction
- Input Devices
- Keyboard,mouse,joystick,scanners,digital
camera, bar code reader, touch
Sreeen,Speech input device (microphone)
- Output Devices
- Monitor , Speaker, Printers ( different
types)
1.Introduction
and output…
- textual information
- visual images - photos, diagrams, icons
- moving images
- sounds - music, voice
- Etc..
2.Input Devices
- Used by a person to communicate to a
computer.
Person to computer
Input Devices
• Keyboard.
• Mouse
• Microphone
• Digital Camera
• Scanner
The Keyboard
The most commonly used input device is the keyboard on which data is entered by manually keying in or typing certain keys. A keyboard typically has 101 or 105 keys.
The Mouse
Is a pointing device which is used to control the movement of a mouse pointer on the screen to make selections from the screen. A mouse has one to five buttons. The bottom of the mouse is flat and contains a mechanism that detects movement of the mouse.
Pointing devices - direct
- Touch screens
Touch screens
• BUT
- Tiring if at wrong angle (needs to be 30-45% from horizontal)
- Get greasy, jammy
- Finger can obscure screen
- Alternative - use stylus to touch screen, or lightpen
Indirect Pointing Devices
- Need more cognitive processing than direct methods, but can be more efficient
- mouse
- tracker ball
- track point
- touchpad…
Indirect pointing devices - other
- Joystick
- The main use of a joystick is to play computer games by controlling the way that something moves on the screen.
Microphones - Speech Recognition
- Use a microphone to talk to your computer - Add a sound card to your computer - Sound card digitizes audio input into 0/1s
- A speech recognition program can process the input and convert it into machine-recognized commands or input
Microphones - Speech Recognition
Digital camera
A digital camera can store many more pictures than an ordinary camera. Pictures taken using a digital camera are stored inside its memory and can be transferred to a computer by connecting the camera to it. A digital camera takes pictures by converting the light passing through the lens at the front into a digital image.