Input devices-2-1
- 2. Input Devices Unit 2 Prepared by Ms. Samina Ahmed
- 3. Chapter Outline The Keyboard – Typing device Pointing Devices Digitizing and Scanning Devices Character and mark recognition devices Image Capturing Devices Audio-based Input systems Sensors
- 4. Topic The Keyboard – Typing Device
- 5. The Keyboard • It is the most common and most important input device. • It is used for manual data entry. • It consist of 104 keys. • It has 3 basic type of keypads as -1 Alphabetic Keypad it consist of alphabets (A-Z) and used to enter alphabetic data. -2 Numeric Keypad It consist of numbers (0-9) and used to enter numeric data. -3 Special Keys It is used to give instructions to the computer.
- 7. What happens when a key presses?
- 8. Types of Keyboards: Foldable Keyboard: It takes less space.
- 9. Braille Keyboard: It consist of keys embossed with Braille characters.
- 11. Holographic keyboard It produces a projection of keyboard on the surface . When a user touches the surface the device recorded the corresponding keystroke.
- 12. Wireless Keyboard A wireless keyboard is a computer keyboard that allows the user to communicate with computers with the help of radio frequency (RF), infrared (IR) or Bluetooth technology. It is common for wireless keyboards available these days to be accompanied by a wireless mouse.
- 13. Gaming Keyboard A gaming keypad is a small, auxiliary keyboard designed only for gaming. It has a limited number of the original keys from a standard keyboard, and they are arranged in a way to facilitate quick and efficient gaming key presses.