Introduction to Computer Peripherals: Types and Uses

1. welcome

2. TarapadaMondal Junior instructor(tech) Computer technology Munshiganj polytechnic institute Phone#01921856575 E-mail:sumontarapada@gmail.com

3. content  Introduction  What is Computer Peripheral  Types of Computer Peripheral  Some Imp. Peripheral devices and their uses  What are not Computer Peripheral  Advantages and Disadvantages

4. Computer peripherals Devices that are connected to the computer, but is not a part of core computer architecture.  Device that is used to put information into or get information out of the computer.

5. Types of peripherals 1.Input devices - Used to interact with , or send data to the computer. Ex- Mouse , Keyboard etc.  2.Output devices - Provide output to the user from the computer. Ex-Monitor , Printer etc.  3.Storage devices - Store data processed by computer. Ex-Hard drives , Flash drive etc.

6. List of computer peripherals device

7. KEYBOARD :-  Made up of push button switches which send a signal to the CPU each time we press them.  Having alphabet, numbers, function ,special keys.  Software keyboard or on screen keyboard display an image of a keyboard on the screen.  The AT keyboard is a keyboard with 84 keys, It was later replaced with the 101-key .  It can be used for shortcuts ,helpful in DOS command (where mouse doesn’t work)

9. 2.MONITOR:- •  An electronic visual display for computers. •  Technology used for computer monitor:- 1.CRT 2. LCD etc. •  The first computer monitor used cathode ray tubes (CRTs). •  The first desktop LCD computer monitors was the Eizo L66 in the mid-1990s. •  Present in many aspect ratio (width:height) in market.

11. Hard drive •  Introduced in 1956 for an IBM computer. •  It is used to store data for long time (Permanent storage). Data can include the computer's operating system and applications as well as personal files including photographs, documents and music. •  2 types of Hard drive:-1.HDD-Hard disc drive(Magnetic disc) 2.SDD-Solid state drive •  Each computer have a Hard drive.

13. What are not comp peripherals? • 1.Power Supply Unit • 2.Motherboard • 3.C.P.U. • 4.R.A.M. • Computer Case (The devices that without which a computer can not process , even a single task )

16. mouse

17. Why it is named as ‘’mouse’’??? ● it looks like real mouse with the cord is the tail and the part we hold is the body.● One of the researchers helping the inventor with his creation called the tool a mouse, and presto! The new tool had a name!

26. Introduction  A Liquid Crystal Display (LCD) is a thin , flat panel display device used for electronically displaying information such as text ,images and moving picture.  LCD is used in Computer monitors, Televisions , Instrument panels, Gaming devices etc.  Polarization of lights is used here to display objects.

27. Why LCD ? •  Smaller size —LCDs occupy approximately 60 percent less space than CRT displays an important feature when office space is limited. •  Lower power consumption—LCDs typically consume about half the power and emit much less heat than CRT displays. •  Lighter weight —LCDs weigh approximately 70 percent less than CRT displays of comparable size. •  No electromagnetic fields —LCDs do not emit electromagnetic fields and are not susceptible to them. Thus, they are suitable for use in areas where CRTs cannot be used. •  Longer life —LCDs have a longer useful life than CRTs.

32. WHAT IS PRINTER? •  A printer is an output device that produces text and graphics on paper. •  Many printers are primarily used as local peripherals, and are attached by a printer cable or, in most newer printers, a USB cable to a computer which serves as a document source. •  In addition, a few modern printers can directly interface to electronic media such as memory card, or to image capture devices such as digital camera.

33. TYPE OF PRINTER •  Printers can be divided into two main groups, impact printer and non-impact printer. •  Impact printer produces text and images when tiny wire pins on print head strike the ink ribbon by physically contacting the paper. •  Non-impact printer produces text and graphics on paper without actually striking the paper. •  Printers can also be categorized based on the print method or print technology.

34.  The most popular ones are inkjet printer, laser printer, dot-matrix printer and thermal printer. •  Among these, only dot-matrix printer is impact printer and the others are nonimpact printers

35. DOT MATRIX PRINTER •  The term dot matrix printer is specifically used for impact printers that use a matrix of small pins to create precise dots •  Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which is driven forward by the power of a tiny electromagnet or solenoid, either directly or through small levers. •  Such printers would have either 7 or 9 or 18 or 24 pins on the print head. 24-pin print heads were able to print at a higher quality.

38. INKJET PRINTER  An inkjet printer is a type of computer printer that reproduces a digital image by propelling variably-sized droplets of liquid material (ink) onto a page.  Desktop inkjet printers, as used in offices or at home, tend to use aqueous inks based on a mixture of water, glycol and dyes or pigments.  A typical ink-jet printer provides a resolution of 300 dots per inch, although some newer models offer higher resolutions.

40. LASER PRINTER  Laser printers are non-impact printers which can print text and images in high speed and high quality resolution, ranging from 600 to 1200 dpi.  A laser beam projects an image of the page to be printed onto an electrically charged rotating drum coated with selenium.  Laser printers produce very high-quality print and are capable of printing an almost unlimited variety of fonts.

45. scanner • Scanners take paper and convert it into a bitmap •  Types of scanners •  Optical scanner •  Bar code readers •  Character and Mark recognition