unit 2- input devices and output devices

unit 2- input devices and output devices

1. input devices

   • opitical mark reader
   • barcode scanner
   • optical character reader
   • keyboard
   • remote control
   • numerical keyboard
   • joystick
   • mouse
   • touchscreen
   • strip reader
   • touch pad

2. analogue and digital data

   • computer process data using `o`s and `1` binary
   • modern input and output devices use digital data , but some systems are based on analogue systems and require converting
   • an adc analogue to digital converter will be used to convert data into binary in order for a computer to process the data

3. exam skills

   • 1 mark
     • state
     • identify
   • 4 mark
     • state- explain- state- explain
   • 6 marks
     • state-explain-develop-state-explain-develop

4. output devices

   • printer
   • speakers
   • inkjet printer
   • graphics plotter
   • dot matrix printer
   • tft monitor
   • crt monitor
   • projector