Computing - Input Devices

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  • Created by: xxSonia
  • Created on: 03-05-15 15:54
Mouse
Enables user to execute commands or issue instructions to the computer by controlling a pointer on the screen.
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keyboard
mechanical keyboard relies on springed keys being pressed down to complete an electric circuit. Circuit rthen transmits a binary signal (ASCII) to the computer to represent the key pressed. Common keyboard layout = QWERTY
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Voice Recognition
computer can be trained to recognize a person's voice and to turn speech into text u
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Barcode reader
Consists of a light source, a lens , photoelectric detectors and decoder circuitry to analyse the bar code's image data and generate character codes. The scanner uses the light source to illuminate the black and white bands. The pattern of reflection
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cont...
s converted from optical form to electrical form by photoelectric detectors in the barcode reader. The electrical form of the reflection data is analysed and the bar code is decoded into character form. The scanner outputs the character codes
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Other cards in this set

Card 2

Front

mechanical keyboard relies on springed keys being pressed down to complete an electric circuit. Circuit rthen transmits a binary signal (ASCII) to the computer to represent the key pressed. Common keyboard layout = QWERTY

Back

keyboard

Card 3

Front

computer can be trained to recognize a person's voice and to turn speech into text u

Back

Preview of the back of card 3

Card 4

Front

Consists of a light source, a lens , photoelectric detectors and decoder circuitry to analyse the bar code's image data and generate character codes. The scanner uses the light source to illuminate the black and white bands. The pattern of reflection

Back

Preview of the back of card 4

Card 5

Front

s converted from optical form to electrical form by photoelectric detectors in the barcode reader. The electrical form of the reflection data is analysed and the bar code is decoded into character form. The scanner outputs the character codes

Back

Preview of the back of card 5

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