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Showing posts with the label HARDWARE COMPONENTS

SUMMARY OF AN OUTPUT DEVICE KNOWN AS INKJET PRINTER

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INKJET PRINTERS THE MOST POPULAR TYPE OF PRINTER IN TODAYS MARKET IS INKJET PRINTER.  IT USES A RESERVIOR OF INK, A PUMP AND A NOZZLE.  IT WORKS EFFECIENTLY AND T IS THE CHEAPEST PRINTER IN THE MARKET STARTING 1800 BUT THE PRINTER COST IS HIGHCOMPARING TO OTHERS TYPE OF PRINTER. IT SPRAYS THE LIQUID INK ON TO A PAPER ACCORDING TO THE PATTERN OF PRINTED   DOCUMENTS.  IT SUPPORTS VERY HIGH DEFINATION OF THE DOCUMENT TYPES. PARTS OF INKJET PRINTER :- INKJET PRINTER ARE SIMPLE DEVICE.  THEY CONTAINS VERY FEW PARTS.  THEY ARE INEXPENSIVE AND EASILY AVAILABLE IN THE MARKET.THE PARTS CAN BE DIVIDED INTO THE FOLLOWING CATEGORIES  1) PRINT HEAD OF INK CARTRIDGE-->  IT CONTAINS LIQUID INK AND TWO HUNDRED TINY NOZZLES TO SPRAY THE INK IN SMALL DROPLETS. MANY TIMES A PRINTER MAYCONTAIN A RESERVOIR OF INK.  MOST COMMON COLOURS ARE USED INTO SEPARATE CARTIDGE ONE FOR BLACK AND ANOTHER ONE FOR CYAN, MAGENTA AND YELLOW.  THERE ARE TWO METHODS OF SPRAYING THE INK. • THERMAL BUBBLE --> IT IS

TROUBLE SHOOTING FOR NO DISPLAY IN PERSONAL COMPUTER.

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  TROUBLESHOOTING FOR NO DISPLAY FRIENDS TODAY I AM GOING TO TELL YOU ABOUT THE CORRECT STEPS TO BE TAKEN IN ORDER TO REPAIR THE COMPUTER IF THERE IS NO DISPLAY.  MEANS THAT WHEN YOU START THE COMPUTER, THE CPU FAN AND SMPS FAN IS RUNNING ALL LED IS ON BUT THERE IS NO DISPLAY IN THE MONITOR. STEP 1  START THE COMPUTER AFTER 30 SECONDS  PRESS NUMLOCK KEY COUPLE OF TIMES.  IF THE NUMLOCK LED IS GETTING ON AD OFF,  THEN THE PROBLEM IS WITH THE MONITOR.  IF THE NUMLOCK LED IS ON OR STEADY ON OR STEADY OFF THEN THE PROBLEM IS WITH THE CPU. STEP2--> SUPPOSE THE PROBLEM IS WITH THE MONITOR  1) CHECK THE AC WALL OUTLET (PLUG) AND POWER CODE WITH THE LINE TESTER OR MULTIMETER.  NOW CHECK THE POWER BUTTON IS ON AND THE BRIGHNESS EVEL OF THE MONITOR.   2) IF THERE IS NO POWER  IN THE MONITOR  THEN THE POWER PANEL MIGHT BE FAULTY.  REPAIR THE MONITOR IF THE POWER LED IS ON, EJECT THE VGA CABLE  FROM THE CPU AND MESSAGE WILL APPEAR ON THE DISPLAY.     3) IF IT DOES THEN THE VGA CABLE OR

NETWORKING DEVICES A GENERAL SUMMARY

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 NETWORKING DEVICES USED IN INTERNET CONNECTION: A GENERAL SUMMARY NETWORK DEVICES, OR NETWORKING HARDWARE, ARE PHYSICAL DEVICES THAT ARE REQUIRED FOR COMMUNICATION AND INTERACTION BETWEEN HARDWARE ON A COMPUTER NETWORK. LAYER 4 -> FIREWALL LAYER 3 -> ROUTER LAYER 2 -> BRIDGE, SWITCH LAYER 1 ->LAN CARD, REPEATER, HUB, MODEM, ACCESS-POINT. NETWORK INTERFACE CARD(NIC) A LAN CARD IT IS A LAYER 1 DEVICE.  IT IS USED TO CONNECT A PC, LAPTOP, WORK STATION AND A SERVER TO A NETWORK. A LAN CARD IS BUILT INTO A MOTHERBOARD BUT WE CAN PURCHASE ADDITIONAL LAN CARD ATTACH IT IN A PCI OR USB SLOT.  EVERY LAN CARD HAS ITS OWN MAC ADDRESS. REPEATER REPEATER IS A LAYER ONE DEVICE. IT WORKS LIKE N AMPLIFIER, BUT REMEMBER APLIFIER WORKS IN ANALOG SIGNAL WHERE REPEATER WORKS IN DIGITAL SIGNAL.  IT IS USED TO FIX THE PROBLEM OF ATTENUATION. HUB IT IS ALSO A LAYER1 DEVICE IT WORKS LIKE A REPEATER BUT REMEMBER REPEATER CANNOT BE A HUB.  A HUB CONTAIN 4, 6, 8, 12, 16 PORTS.  HUB REGENERATE AND IN

CHIPSETS OF COMPUTERS.

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A CHIPSET IS A COLLECTION OF CHIP OR CIRCUITS THAT PERFORM INTERFACE AND PERIPHERAL FUNCTION FOR THE PROCESSOR.   THIS COLLECTION OF CHIPS IS USUALLY THE CIRCUITS THAT PROVIDES INTERFACES FOR MEMORY EXPANSION CARDS AND ONBOARD PERIPHERALS AND GENERALLY DICTATES HOW A MOTHERBOARD WILL COMMUNICATE WITH THE INSTALLED PERIPHERALS. CHIPSET ARE USUALLY GIVEN A NAME AND MODEL NUMBER BY THE ORIGINAL MANUFACTURER AND MODEL ALSO TELL YOU THAT YOUR PARTICULAR CHIPSET HAVE A CERTAIN SET OF FEATURES EG TYPE OF RAM SUPPORTED TYPE AND BRAND OF ONBOARD AND SO ON. CHIPSETS CAN BE MADE UP ONE OR MORE INTEGRATED CIRCUIT CHIPS.   INTEL BASED MOTHER BOARDS TYPICALLY USE TWO CHIPS.   THE FUNCTION OF CHIPSETS CAN BE DIVIDED INTO TWO MAJOR FUNCTIONAL GROUPS CALLED NORTH BRIDGE AND SOUTH BRIDGE. NOW I AM GOING TO SHOW YOU SOME OF THE BASIC CHIPSET IN COMPUTERS AND WIDELY USED CHIPSETS USED IN MODERN COMPUTERS .   THEIR NAMES AS 1) NORTH BRIDGE 2) SOUTH BRIDGE SO LET US BEGIN IN OUR LITTLE JO

ARITHMETIC CALCULATION IN COMPUTERS

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ARITHMETIC OPERATION AND CONVERSION DONE BY COMPUTER As we have seen in previous post that arithmetic computation is an important thing in calculation, if a person doesn’t know arithmetic computations,   he will be doomed to be in trouble during calculations that happens   in everyday life.   So it is necessary to learn arithmetic computation.   So in this post I am going to take one step further.   I am going to write about octal and hexadecimal numbers. Now let us discuss some arithmetic conversion.   Let us see what is octal and hexadecimal numbers used by digital computer. The conversion from and to binary, octal and hexadecimal plays an important part in digital computers.   Since 2 3 = 8 and 2 4 = 16 each octal digit corresponds to three binary digits and each four binary digit corresponds to one hexadecimal digit.   The conversion of from binary to octal is easily accomplished by partitioning the binary into group of three digit each, starting from binary

MONITORS: A COMPUTER PART

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Folks today i am going to say something about an output device called monitor.   As maximum people know about monitors so i am going to write few things about monitor much of the information you know but i am going to say some few words hence please be with me. Monitor is a primary output device.   It displays all current process application and data i.e. Running inside a computer system.   A standard monitor uses an analog vga interface, which plugs into a tp15 vga connector to a mother board.   There are two types of monitor technology available to the market. CATHODE RAY TUBE (CRT MONITOR) This monitor is fading in popularity but still in widespread use with older computer systems.   It is analog standard monitor a crt uses a picture tube that was used in older tube based tv sets.   The narrow end of the picture tube contains an electron gun it emits 3 electron beams one each for red, green and blue light.   The front end of the picture tube is coated with phos

PROCESSOR AND HYPER THREADING A SHORT SUMMARY

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PROCESSOR AND HYPERTHREADING Friends in the last post i tried to say something about computer science and mathematics relationship.   Now i am going to say something about processor and hyperthreading.   So let’s get started. The Physical Component By Which A Computer Is Mde Which We Can See, Touch And Feel Is Called Computer Hardware Example Ram, Motherboard. ·          INPUT DEVICE   : These hardware are used to input any data, instruction on command insidea computer device.   example keyboard mo9use scanner microphone, webcam etc ·          OUTPUT DEVICE :   these hardware are used to get any output from a computer system.   example: monitor, printer, speaker. ·          CENTRAL PROCESSIG UNIT (CPU) : This Device Proceses All Instruction Given By A User, And It Also Other Haqrdwqaar Peripherals Example   :Microprocessor ·          MOTHERBOARD: It is the main electric circuit board which is made by a pcb(printed circuit board).   It hods all hardware component

IS DIGITAL COMPUTERS ARE VALUABLE?

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DIGITAL COMPUTERS Today computers are used extensively in every day life.  It is used in basic as well as industrial, scientific and commercial purposes.  Our space program would not have been well developed without the real time monitoring of the machine of the spacecraft which was going to land on moon or any other planet of the scheduled program or launching of satellites on the orbit of earth. This is the scientific purpose i told you about while it has commercial purposes.  Like automatic data processing which the business enterprise uses. It has many works in educational purposes for example multiple choice question answers can be checked without any error and then the results can be printed out automatically with the help of the printer which is connected to the digital computer.   Digital computer are also used in air traffic control to control the aviation industry to help them control the planes by sending them data about the distance between the planes and t

LOGIC OF COMPUTERS

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LOGIC OF COMPUTER IN PAPER AS WELL AS PRACTICAL USE We always use logic in every day matters, so do the machines.   But we were taught by experiences we count and the people we trust and these things matters most because it will help in dark times.   But to make the machine understand the logic is very hefty work. But this is certainly not impossible.   In order to understand logic we use integrated circuits.   But to do this we need to design the integrated circuits on paper.   This requires certain rules of algebra.   This I am going talk about the rule of an algebra called the duality principal. It states that every algebraic expression deducible from the postulates of Boolean algebra remains valid if the operators and identity elements are interchanged.   In a two value Boolean algebra, the identity elements and the elements of the set B are same 1 and 0.   The duality principal has many applications.   If the dual of an algebraic expression is desired, we simply

RANDOM ACCESS MEMORY

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ALL ABOUT RAM RAM (random access memory) is a place in computing device where the operating system, application programs and data in current uses are kept .   So they can be quickly reached by the device processor. Ram is much faster to read from and write to than other kinds of storage in a computer, such as hard disk drive (hdd) solid turned off.   Ram loses its data when the computer is turned on again,   the operating system and other files once again loaded into ram again. Types of ram Ram can be classified into two types 1.        Static ram     2.        Dynamic ram Static ram Static ram is a random access memory (ram) that retain its memory as long as power is being supplied or any new new input enters.   Unlike dynamic ram, which stores bits in cellsconsisting of a capacitor and a transistor is in a latch circuit (flip flop).   Sram does not have to periodically refreshed.   Static ram provides faster access to data and is more expensive than dram.