Topic outline


    Input devices

    Input devise is a device that  can send data to another device, but it cannot receive data from another device. Examples of input devices include the following.

    a)      Graphics Tablets

    b)      Cameras

    c)      Video Capture Hardware

    d)     Trackballs

    e)      Barcode reader

    f)       Digital camera

    g)      Gamepad

    h)      Joystick

    i)        Keyboard

    j)        Microphone

    k)      MIDI keyboard

    l)        Mouse (pointing device)

    m)    Scanner

    n)      Webcam

    o)      Touchpads

    p)      Pen Input

    q)      Microphone

    r)       Electronic Whiteboard

    s) OMR

    t) OCR

    u) Punch card reader

    v)MICR (Magnetic Ink character reader)

    w) Magnetic Tape Drive

    Output devices

    Output devise is a device that can receive data from another device and generate output with that data, but it cannot send data to another device. Examples of output devices include the following.

    1. Monitor (LED, LCD, CRT etc)
    2. Printers (all types)
    3. Plotters
    4. Projector
    5. LCD Projection Panels
    6. Computer Output Microfilm (COM)
    7. Speaker(s)
    8. Head Phone
    9. Visual Display Unit
    10. Film Recorder
    11. Microfiche

    The following devices are both Input–Output Devices:

    1. Modems
    2. Network cards
    3. Touch Screen

          4. Headsets (Headset consists of Speakers and Microphone. 

               Speaker act Output Device and     Microphone act as Input 


         5. Facsimile (FAX)  (It has scanner to scan the document and also 

               have printer to Print the  document)

         6.Audio Cards / Sound Card

  • Ports and Connectors

    Ports and connectors

    What is the difference between Port and Connector? - Super User

    Different PC Ports and Connector Types | Promotional Drives
    16 Types of Computer Ports and Their Function

    A Computerr Port is an interface or a point of connection between the computer and its peripheral devices. Some of the common peripherals are mouse, keyboard, monitor or display unit, printer, speaker, flash drive etc.

    A computer port is also called as a Communication Port as it is responsible for communication between the computer and its peripheral device. Generally, the female end of the connector is referred to as a port and it usually sits on the motherboard.

    In Computers, communication ports can be divided into two types based on the type or protocol used for communication. They are Serial Ports and Parallel Ports.

    A serial port is an interface through which peripherals can be connected using a serial protocol which involves the transmission of data one bit at a time over a single communication line. The most common type of serial port is a D-Subminiature or a D-sub connector that carry RS-232 signals.

    Different types of ports

    • PS/2
    • Serial Port
    • Parallel Port or Centronics 36 Pin Port
    • Audio Ports
    • Video Ports
    • Digital Video Interface (DVI)
    • Display Port
    • RCA Connector
    • Component Video
    • S-Video
    • HDMI
    • USB
    • RJ-45
    • RJ-11
    • e-
      connector - Computer Definition
      A simple device that physically links, couples, or connects, two things together. A male connector has pins that fit into the sockets, or receptacles, of a female connector, as the connectors mate.

    • 1. VGA Cable

      Also known as D-sub cable, analog video cable

      VGA Cable

      Connect one end to: computer monitor, television (PC input port)

      Connect other end to: VGA port on computer (see image below)

      VGA Port

      2. DVI Cable

      DVI Cable

      Connect one end to: computer monitor

      Connect other end to: DVI port on computer (see image below)

      DVI Port

      3. HDMI Cable

      HDMI Cable

      Connect one end to: computer monitor, television

      Connect other end to: HDMI port on computer (see image below)

      Note: If you're hooking up a television to your computer, then we would recommend that you use a HDMI cable as your PC cable connection since it is able to transmit both display and sound - So you can not only use your TV screen as a monitor, but also make use of your TV speakers to play PC audio.

      HDMI Port

      4. PS/2 Cable

      PS/2 Cable

      Connect one end to: PS/2 keyboard, PS/2 mouse

      Connect other end to: PS/2 ports on computer (see image below)

      • Purple PS/2 port: keyboard
      • Green PS/2 port: mouse
      PS/2 Ports

      5. Ethernet Cable

      Also known as RJ-45 cable

      Ethernet Cable

      Connect one end to: router, network switch

      Connect other end to: Ethernet port on computer (see image below)

      Ethernet Port

      6. 3.5mm Audio Cable

      Also known as phone connector (since 3.5mm jacks are often found on mobile phones too)

      Audio Jack

      Connect one end to: computer speakers, 3.5mm headphones, 3.5mm microphone

      Connect other end to: audio ports on computer (see image below)

      • Green audio port: computer speakers or headphones
      • Pink audio port: microphone
      • Blue audio port: MP3 player, CD player, DVD player, turntable, electric guitar etc (line-in port to play and record sounds from the above devices)
      Audio Ports

      7. USB Cable

      For USB computer cable connections, there are two popular formats: USB 2.0 and the newer USB 3.0

      How to tell USB 2.0 and 3.0 cables apart: USB 3.0 cables have a blue tip, and sometimes you can find a SS "Super Speed" label on it. See image below:

      USB Cables

      Since USB was intended to be the one computer cable connection to replace them all, it's no surprise that the possible uses for a USB port are quite mind-blowing. For this computer cable guide, we have listed its more common uses below:

      Connect one end to: USB device

      • Storage devices: USB flash drive, external hard drive, external optical drive
      • Input devices: USB keyboard (wired and wireless), USB mouse (wired and wireless), webcam, scanner, gamepad
      • Output devices: printer, all-in-one office machine, USB speaker
      • Wireless adapters: network (Wi-Fi) adapter, bluetooth adapter, 3G adapter
      • Data (and charging) cable for mobile devices such as mobile phone, tablet, MP3 player

      Connect other end to: USB ports on computer (see image below)

      How to tell USB 2.0 and 3.0 ports apart: USB 2.0 ports have black tips while USB 3.0 ports come with blue tips. See image below:

      USB Ports

      USB 3.0 is backwards-compatible... meaning that you can connect a USB 2.0 device to a USB 3.0 port and vice versa (but the USB 3.0 devices hooked up to a USB 2.0 port will perform at lowered rates) - Click here to learn more about the difference between USB 2.0 and 3.0.

      8. Computer Power Cord

      Computer Power Cord

      Connect one end to: AC power socket

      Connect other end to: power supply unit (see image below), computer monitor

      Note: Always turn off your power supply unit (with the 1-0 switch at the back) before connecting a power cord to it.

      Back of Power Supply Unit