computer practicals

Practical - 02System Unit Rare Panel

Ports and Connectors

System Unit Rare Panel

• A computer port is a connection point or interface between a computer and an external or internal device. Internal ports may connect such devices as hard drives and CD ROM or DVD drives; external ports may connect modems, printers, mice and other devices.

• A port serves as an interface between the computer and other computers or peripheral devices. Physically, a port is a specialized outlet on a piece of equipment to which a plug or cable connects. Electronically, the several conductors making up the outlet provide a signal transfer between devices.

DIN5 – Port and Connector

• It contains 5 holes/pins.• DIN stands for Deutsches Institut für

Normung.• It is commonly known as a PC/AT connection.• It is utilized for serial data transfer between

computers and peripherals such as PC keyboards, MIDI keyboards, and electronic instruments.

DIN5 – Port and Connector

PS/2 – Port and Connector

• Introduced by IBM in 1987.

• Stands for Personal System/2.

• Used to connect Keyboard and Mouse.

• Also called Mini-Din-6.

Purple Keyboard

Green Mouse

Serial – Port and Connector

• Sends the data serially bit by bit.• Also called DB9. • Also called COM ports (Communication).• Bi-Directional (Transmit and Receive).• Mostly used to connect serial mouse, modem,

GPS Receivers and Bar code scanners.

Parallel – Port and Connector

Pins (2 – 9) = Data (0 bit – 7 bit)

Parallel – Port and Connector

• Sends 8 bits at a time.• Also called DB25 or Centronics port. • Also called Printer Port or LPT (Line Printer

Terminal).• Mostly used to connect printers, scanners and

external drives.• A newer type of parallel port, which supports the

same connectors as the Centronics interface, is the EPP (Enhanced Parallel Port) or ECP (Extended Capabilities Port).

VGA – Port and Connector

• VGA stands for Video Graphics Array.

• Also called DE15 or DB15.

• Also called RGB Connector.

• Used to connect Monitor, TV and Projector.

BLUE GREEN RED

USB – Port and Connector

• USB stands for Universal Serial Bus.

• Used to connect many different types of devices to system unit.

• Is Plug and Play.

• Up to 127 devices can be connected.

• Used to connect Monitor, TV and Projector.

USB – Port and ConnectorVersions of USB

• USB 1.0 (Full Speed) • Released in the year 1996• Maximum transfer speed of 12 Mbits/s

• USB 2.0 (High Speed)• Released in the year 2000• Maximum transfer speed of 480 Mbits/s

• USB 3.0 (Super Speed)• Released in the year 2008• Maximum transfer speed of 5 Gbits/s

Types of USB Connectors and ports• USB A• USB B• USB Mini A• USB Mini B• USB Micro AB• USB Micro B

USB Micro B

USB Micro BUSB Mini B

USB Mini BUSB Mini A

USB AUSB Micro AB

Firewire – Port and Connector

• Also called IEEE1394 Interface.• Developed by Apple in 1990s.• It provides serial communication.• Plug and play.• Up to 63 devices can be attached.• Provides maximum transfer rate of 400

Mbps/s.

RJ-45 – Port and Connector

• Stands for Rigid Jack 45 or Registered Jack 45.

• Used to connect computer over Local Area Network (LAN)

• Stands for Rigid Jack 11 or Registered Jack 11.

• Also called Phone connector or Phone Jack.

• Used to connect computer over Internet using dial up phone line.

Audio – Port and Connector

3.5mm Stereo Jack

Mono Jack

Audio – Port and Connector

S/PDIF – Port and Connector

• Stands for Sony/Philips Digital Interconnect Format.

• Provides Audio interface.

DVI – Port and Connector

• Stands for Digital Video Interface.

• Used to Connect Video Devices like Monitor and Projector.

HDMI – Port and Connector

• Stands for High-Definition Multimedia Interface.

• Audio and video interface.

S-Video – Port and Connector

• Stands for Separate Video.

• Contains 4 pins.

• Provides Video interface.

Label the Ports

PS/2 to USB Conversion

USB Pin Name

USB Pin Number

USB Wire Color

PS/2 Pin Number

PS/2 Pin Name

PS/2 Wire Color

VDC +5V 1 Red 4 VDC +5V Red

Data - 2 White 1 Data White

Data + 3 Green 5 Clock Brown

Ground 4 Black 3 Ground Black

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