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Transcript of Input Devices
"ANYTHING USED TO SEND DATA TO A COMPUTER"
It consists of a display monitor that is able to sense the location of a finger touching the screen.
A microphone converts sound into an electrical signal. There are many types of microphone but they all work on the same principle.
Automated input devices are quicker and usually generate fewer mistakes than manual input devices. The device will get the data automatically instead of you having to do it by hand. E.g. bar code reader, OMR reader, OCR reader.
Optical Mark Reader (OMR)
reads marks made by pencil on a printed form into the computer
Manual input devices are used
by people who enter data by hand.
For example, a keyboard and a mouse.
Magnetic Ink Character Reader (MICR)
used to read the numbers from the bottom of cheques to obtain data such as account numbers and bank sort codes.
A concept keyboard is a manual input device.
Instead of the usual 'A-Z' keys that you have on a traditional keyboard, a concept keyboard has pictures of items instead. They are used in places like fast food restaurants.
A point and click device similar to a mouse. A palm-sized ball is nested in a cradle and as you roll it around, the mouse pointer moves around on the screen.
A joystick is an input device which is mostly used for playing computer games such as flight simulators.
It has a moveable control lever which can be tilted in various directions to control what is happening on the screen.
A digital camera is a camera that uses a memory card instead of film. A digital camera can hold many more pictures than a film camera by using a memory card.
This takes an image from a video camera or television and coverts it so it can be watched, and stored on, a computer.
Scanners, or computer scanners are used to transfer images or text from paper into a digital format that the computer can use.
Once the information has been transferred, it can then be edited, printed, or uploaded to the Internet.
This is an input device which is often used by graphics designers and illustrators to work with images or hand drawn designs.
The computer must be running an application that can deal with the graphics tablet. For example Photoshop or CAD software.
A sensor is a device that measures or detects a real-world physical condition, such as motion, heat or light and converts the reading into an analogue or digital representation.
(e.g. next chap)
Used to scan or 'read' the barcode by using a visible red light
Magnetic strip (or stripe) reader
reads the code at the back of credit cards
Examples of Output Devices