introductions and ports and connectors

Computer? – Device which store data, process data, access data according to users need.

Computer = Hardware software

Hardware- physical components of computers.

Software- program used to control Hardware.

How computer works?

                                                    

Process device                                                                                                                                         

Input devices                                                                                                                                      monitor

Keyboard                                                                                                                     

Mouse                                                                                                                                         

Scanner                                                                                               

Digital camera

Note – output on monitor is called SOFT COPY.

                Output on paper is called HARD COPY.

SMPS (Switch Mode Power Supply)

-          It can call as a power house of computer.

-          It reduce the amount of voltage. (220V AC to 12V DC)

-          (AC= Alternate current / DC=Direct current)

Mother Board / Logic Board/System Board

-          Mother Board Get The Power Supply From SMPS.

-          Other Devices Get The Power Supply From Mother Board.

-          Mother board content other devices.

CPU (Central Processing Unit)

-          Brain of the computer.

-          It control all devices.

Ports and connectors

VGA Port- 15 pin port arranged in 3 rows to connect monitor (CRT-Cathode Ray Tube monitor)

15 pin VGA Port

DVIPort – 24 pin port arranged in 3 rows to connect LCD monitors (LCD- Liquid Crystal Display-Lab top Monitor)

24 Pin DVI Port

PS2/Port –

-          Used to connect PS/2 mouse.

                                                                      6 Pin PS/2 Port

Serial port / COM Port –

-          9 pin connector to connect serial mouse.

-          Port which allow only one bit at a time.

-          Used to connect communication device.

(COM Port- Communication Port)

                                                      9 Pin Serial Port