Input Device


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Input Device

  1. 1. Input device<br />automatic<br />
  2. 2. Introduction<br />An input device is a piece of hardware use to enter data into computer .<br />There are 2 different type of input device. <br />Automatic and manual input device.<br />In this presentation I’m going to talk about automatic input device.<br />
  3. 3. M.I.C.r<br />Magnetic Ink Character Recognition is an automatic cheques reader.<br />It read 300 cheques per minute with 100% accuracy.<br />At the bottom of the cheque there are cheque number, bank or building society sort code and customer’s code account number.<br />The number are written in special ink which contain iron particles.<br />This ink can be read by M.I.C.R<br />
  4. 4. O.M.R<br />Optical Mark Reader can use to check the multiple choices test.<br />They detect of pencil mark by reflecting light onto it.<br />10,000 forms can be read in an hour depend on the quality of machine.<br />Only one computer needed to collect and process data.<br />OMR accurate than data that being keyed by a person.<br />
  5. 5. OCR<br />Optical character Recognition is use for scanning the character accurately depend on how clear the writing is.<br />95% accurate<br />Cheap and faster than paying someone to manual input information.<br />All documents need to be check <br />If document have poor handwriting more mistake will occur.<br />Not worth doing for small amounts of text.<br />
  6. 6. Barcode reader<br />The barcode give information about country of manufacture, name of manufacture and a product code.<br />It does not contain the price of an item.<br />A barcode reader is automatic scan or read by visible red light.<br />To identify the product and price from the database.<br />
  7. 7. Magnetic stripe reader<br />Magnetic stripe usually found at the back of most credit card and membership card.<br />Magnetic Stripe Reader machine read the magnetic stripe and the data is read and fed back to the computer.<br />Simple to use<br />Cheap to produce<br />Security are produce by using pin code.<br />Very limited amount of data.<br />Data can be easily destroy by strong magnetic field.<br />
  8. 8. Biometric device<br />Finger print and retinal identification are being used in many places.<br />Special device will capture the biometric data which pass on to the computer for processing and identification.<br />
  9. 9. Sensors<br />Sensors are used to detect quantities outside computer<br />Such as light, temperature and pressure.<br />Collect data automatically<br />Data can be transmitted immediately to the computer.<br />Or can be stored for a period of time.<br />&apos;Analogue to Digital Converter&apos; (ADC) must be connected between the computer and the sensor in order to process input from sensors.<br />