Flashcards
input and output devices do v2
Cards in this deck (10)
- 1what does ocr meanOptical Character Recognition
Optical Character Recognition, or OCR, is a technology that enables you to convert different types of documents, such as scanned paper documents, PDF files or images captured by a digital camera into editable and searchable data. - 2what do bar code readers doThese devices shine a laser on a barcode. The lines on the barcode are translated into numbers. They are commonly used in shops when you go to the checkout
- 3what do scanners doA scanner is used to transfer printed documents onto a computer
The document is placed onto the scanning surface. The scanning head passes over it and makes an electronic image - 4what do Magnetic stripe readers doA scanner is used to transfer printed documents onto a computer
The document is placed onto the scanning surface. The scanning head passes over it and makes an electronic image - 5what do Chip and PIN readers doCredit cards have the PIN data stored in an encrypted format on a chip that’s embedded in the card. It is encrypted to stop the PIN being read if someone steals or finds your card.
- 6what do Sensors doSensors are designed to measure things like heat, light, noise or movement
They turn the measurement into digital data (numbers) which are transmitted to the computer via the connection e.g. USB - 7what do Remote Controls doRemote Controls are input devices
The user presses a button e.g. ‘Play’ and that data is sent to the computer
Older remote controls use infra-red beams to transmit data from the remote to the computer - 8what do Projectors doThis projects a display onto a large screen or flat surface
Projectors are used in classrooms, display areas and home cinemas - 9what do Plotters doThis is a specialist type of printer that generates very large architectural drawings and CAD images
- 10what do Activators doThis is a hardware device which carries out a physical movement when sent a signal
Activators are used in robotics, CAM (Computer Aided Manufacturing) and home automation systems.
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- Flashcards on input and output devices do v2, created by Derek johnson on 14/12/2015.
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- Derek johnson
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