Input & Output Devices

Input & Output Devices

1. Manual Input Devices

   • Definition of input devices : Hardware Devices that allow data to be entered into a computer.
   • Definition of Manual Input Devices : Data that is entered by hand.
     • Manual Input devices require humans to do most of the work needed to get the data. For Example : If you are using a keyboard to input instructions into the computer, you need to press the keys yourself.
   • Examples of Manual Input Devices : Keyboard, Remote Control, Joystick, Scanner, Graphics Tablet, Microphone

2. Direct Input Devices

   • Definition : No human interaction needed to collect data
     • For example : All human just have to point the reader at the barcode scanner. The reader will do the rest
   • Example of Direct Input devices : Magnetic stripe reader, Chip and pin reader, Barcode reader, Optical Mark Reader ( OMR ), Optical Character Reader ( OCR )

3. Sensors

   • Definition : A devices which automatically inputs data into a computer system, where the data can be changed anytime.
   • Used to detect data in the surrounding environment that constantly changes. For example : Temperature - measuring heat in a room, Light - setting off a burglar alarm, Humidity - detecting when plants are too dry
   • Examples of sensors : Temperature, Pressure, Light, Sound, Humidity, pH
   • Uses of sensors
     • Sensors are used in monitoring and control applications. When monitoring, data is sent directly to some sort of computer, is then processed and used.

4. Output Devices

   • Definition : Hardware devices that allow information to be sent out of a computer system.
   • Output devices are part of the 4 main hardware components of a computer system.
   • Examples of Output Devices : CR Monitor, TFT Monitor, Laser Printer, Inkjet Printer, Plotter, Speakers

5. Control Devices

   • Definition : Output devices that work in conjunction with sensor input devices and commands from computers in order to control a process.
     • Control devices are output devices that work together with sensors.
   • Example of Control Devices : Motor, Buzzer, Heater, Light/Lamp

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