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
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 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.
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Micro computer
Mini computer
Main frame computer
Super computer
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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
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(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.
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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 .
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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.
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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.