Input and Output Devices by Aman Barma


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This is for Students who want to know about Input And Output Devices. so, Best of luck guyssssss......

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Input and Output Devices by Aman Barma

  1. 1. Keyboard
  2. 2. keyboard
  3. 3. Mouse
  4. 4. mouse
  5. 5. Microphone {mic}A mic converts the sound receivedinto computers format, which iscalled DIGITIZED SOUND orDIGITAL AUDIO.A MIC can work if our PC has ahardware known as SOUND CARD.
  6. 6. Mic
  7. 7. OUTPUT DEVICESThe output unit is responsiblefor producing the output inuser redable form. Some of theoutput devices are Monitor,Printer, Plotter etc.Computer sends outputthrough Monitor.
  8. 8. MONITORMonitor {or screen} is the most commonform of output from a computer. Thepicture on a monitor is made up ofthousands of of tiny coloured dots calledpixels. The two most common Monitorare Cathode Ray Tube and LiduidCrystal Display .
  9. 9. Cathode ray tubeCRT contains an electron gun atthe back of the glass tube. Thisfires electrons at groups ofphosphor dots, which coat theinside of screen. When theelectrons strike the phosphordots they glow to give thecolours.
  10. 10. Cathode Ray Tube
  11. 11. Liquid crystal displayLIQUID CRYSTAL is the materialused to creat each pixel on thescreen. The material has a specialproperty –it can ‘polarise’ lightdepending on the electrical chargeacross it. This feature allows thepixels to be created. THIN FLIMTRANSISTOR is the device with ineach pixel that sets the charge.
  12. 12. Liquid crystal display
  13. 13. printerA most convenient and usefulmethod by which the computer candeliver information is by means ofprinted character. Printers can bedivided into two distinct categories.1} Impact Printer.2} Non-Impact Printer.
  14. 14. Impact PrinterIn Impact Printers, there iscontact between the printer headand paper.Impact printer comes in lots ofvarities such as Line Printer,Drum Printer, Daisy WheelPrinter and Dot Matrix Printer.
  15. 15. Dot-matrix PrinterA Dot-Matrix Printer is the most popularserial printer i.e. it print one character at atime. In, DMP, the printing head contains avertical array of pins. As the head movesacross the paper ,selected pins fireagainst an inked ribbon to form a patternof dots on the paper. There are 80 columnand 132 column DMPs available in themarket.
  16. 16. Non-impact printerIn Non-Impact Printers, there is nomechanism contact between theprinter head and paper.The natural limitation of speed inelectromechanical devices and costconsideration have led to thedevelopment fo printers called Non-Impact Printer.
  17. 17. Types of n-ipi. Electromagnetic Printers.ii. Thermal Printersiii. Electrostatic Printers.iv. Inkjet Printer.v. Laser Printer
  18. 18. printer
  19. 19. SpeakersSpeaker receives thesound from electriccurrent from thesound card and thenconvert it to soundformat.
  20. 20. speaker