wel come to computer world
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Transcript wel come to computer world
BY- UPENDRA SHARMA
It is a electronic machine.
When we gives input in a computer it
takes and process then and after then
it gives output.
It is a very versatile machine.
It has more much speed
There is two type of computer.
1-Analog
2- Digital
Analog computer are those computer
whose handle or process about
physical nature.
Ex- temperature, pressure etc.
Digital computers are binary based
computers.
It is create information only two
state, namely 0 and 1.
Micro computer
Mini computer
Main frame computer
Super computer
Speed
Accuracy
Diligence
Multi tasking
Memory (power of remaining)
All input output and secondary
storage devises of a computer is
called peripheral devices.
Input devises
Output devices
Secondary storage devises
(a) key board
(b) mouse
(c) scanner
(d) joystick
(e) light pen
(f) web cam
(g) mice
It is similar to a type writer.
It is use to feed data in a computer.
It contain alphabets, digits, special
character keys , function keys, and
some control keys.
we can use one and more keys
together for a special task.
Like ctrl + s to save.
ctrl+ alt+ del to task manager and
log off the pc.
It is a pointing input device.
It is use to move the cursor on the
screen.
The muse also use to draw sketches,
diagram est..
One type of mouse rolling ball and
the second type use optical
technique.
If we want insert image in a computer
then we use scanner,
It convert hard copy in soft copy.
A scanner is a optical device that
analysis image , text ,or hand writing,
and convert in to a digital form.
A joystick is also a pointing device.
It is use to move curser on the
screen.
its function similar to a mouse.
It is mainly use to play video games.
Web cam is input device .
It is use to insert picture in a
computer.
By the web cam we can do video
calls.
And share the live video.
It is a input devise
It is use to input signature and any
hand writing in a computer.
`MICE
IT I s a audio input device.
Which is use to input audio in a
computer.
By the mice we can call through the
internet in a computer.
Output devise are those devise of
computer that supply information
result in the hard copy and soft copy.
Monitor
Printer
Plotter
Projector
Speech synthesizer
It is also called visual display unit
(VDU) .
It is similar like a television.
Whatever we type by the keyboard
we can see on monitor
Its comes in two types black white
and color.
Black and white shows only two
colors, and color monitor display
many colors .
It has three type
(1) CRT (cathode rays tube)
(2) LCD (liquid crystal display)
(3) TFT (thin film transistors)
A CRT monitor is very similar to a
television.
In a cart monitor we show the picture
through a picture tube.
The picture tube fire a narrow beam
of electronic at the screen, the beam
strike the screen and then we show
picture.
LCD monitors is the flat panel
monitors.
It has very large numbers of liquid
crystal show a picture and text.
Printers are output devices that refers
hard copy output.
It use ink to print in a page.
Printer gives best quality output .
It can print color and black and white.
There is three types of printers.
(1) Dot matrices printer(DMP)
(2) Ink jet printers
(3) Lager printers
Dot matrix printer use head ribbon and pins to
give output.
Its printing similar to type writer printing.
When we give the print it is reduce very much
noise. It is slower then inkjets and lager printers.
It is use a tractor feed mechanism to transfer
paper through a printer.
It is comes in two size. 80 column dot matrix
and 132 Colum dot matrix.
That printer refers in non impact printer .
Ink jet printers use to color cartridge to
printing.
Inkjet printer spray ink into paper to form
image or text.
It can print both type color and black.
It reduce might sound it time to print.
in this printer print head moves across the
paper horizontally.
print quality measured in DPI , its printing is
150 to 1200 DPI.
That printer only soles in business .
This printer use a laser beam to
produce image or text in a paper.
The main component of this printer is
drum and toner
A laser printer can also print in both
type color and black and white.
It can print with a speed 4-16 pages
per min.
Its printing quality is 300 1200 dpi .
A plotter is a specialize graphical
printing .
It is operated moving a pen.
It is use mechanical or thermal
technology to create large amount of
image.
It is use to technical drawing or CAD
application and graphical image .
Speaker are use to produce audio
output .
That is work in conjunction with sound card to
produce the audio output.
Some of the common feature that are included in
most of speaker are
An LED indicator.
3.5mm headphone jack.
Volume controller
A remote volume control.
Projector is out put device to use connect
to a PC.
It is use to project information on a large
screen.
Its widely use to giving permutation.
Any audio video image and text displayed
by the projector.
Projector makes presentation more lively
and interesting.