Flashcards
Input Methods and Devices
Cards in this deck (4)
- 1How does a mouse workBall or laser detects movement on X or Y plane and in-built processor converts to binary, sends to computer via cable, showing 1s and 0s with different voltages.
- 2How does a keyboard workOn board processor works out which key is pressed as each key completes a circuit when pressed, sends this information to computer as electric signals.
- 3How does a bar code reader work?A photo diode measures intensity of light reflected form the bar code, returning to the on-board processor as a wave to be converted into binary by the processor.
- 4How do fingerprint and iris scanners work?Using infra-red light to detect patterns and convert said patterns into binary code
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- Flashcards on Input Methods and Devices, created by SebShort on 02/03/2015.
- Created by
- SebShort · Mar 2015
- Updated
- Feb 19, 2016
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