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Lesson 03: Computer Lab Management

Lesson 03: Computer Lab Management. LEARNING AREA :. Computer Parts & Components. LEARNING OUTCOMES :. At the end of this lesson, students should be able to: Identify the components of a system unit: Input/Output port (I/O port), Reset button, CDROM drive, Floppy drive, Hard disk drive

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Lesson 03: Computer Lab Management

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  1. Lesson 03:Computer Lab Management

  2. LEARNING AREA : Computer Parts & Components

  3. LEARNING OUTCOMES : • At the end of this lesson, students should be able to: • Identify the components of a system unit: Input/Output port (I/O port), Reset button, CDROM drive, Floppy drive, Hard disk drive • State the functions of the main components of a system unit. • State the functions of CPU, RAM, ROM and expansion slots found on the motherboard.

  4. Inculcate values of responsibility and cooperation among the pupils. • State the definition of peripheral. 6. Identify different types of peripherals: Input devices, Output devices, Storage devices • State examples of different types of peripherals: Printers, Scanners, LCD projectors, Digital cameras , External CD drives, Externalstorages.

  5. 8. Explain the functions of each peripheral. 9. Identify input devices 10.List input devices 11. State the respective functions of input devices 12. Identify output devices 13. List output devices 14. State the respective functions of output devices 15. Identify storage devices

  6. 16. List storage devices 17. State the functions of storage devices • State the units for data measurement: Bit, Byte, Kilobyte, Megabyte & Gigabyte 19. Inculcate values of responsibility, accountability and cooperation

  7. System Unit

  8. Examples of System Unit

  9. System Unit • Box-like case that contains • computer’s electronic • components. • Sometimes called the chassis

  10. Inside View Of System Unit

  11. Front View of a System Unit DVD-ROM drive CD-ROM/CD-RW drive Zip drive Empty drive bay Floppy disk drive Power button Reset button

  12. Functions Of The Main Components Of A System Unit

  13. Layout Of A Motherboard Slot RAM Expansion slots

  14. Functions Of The Components Of The Motherboard a microprocessor. It is an integrated circuit chip that is capable of processing electronic signals. CPU A computer uses RAM to hold temporary instructions and data needed to complete tasks. It can only be stored by the manufacturer; it cannot be changed. RAM & ROM

  15. Expansion Slots Expansion slots are the sockets where the circuit boards or the adapter cards can be inserted into the motherboard.

  16. PERIPHERALS

  17. Definition of peripheral Peripheral Device External hardware devices attached to the computer are called peripheral devices

  18. There are three types of peripheral devices : • Input devices • Output devices • Storage devices

  19. Input Devices

  20. Identify input devices A keyboard is an example of input device for text input. A scanner is an example of input device for graphical as well as text input.

  21. A microphone is an example of input device for audio input A webcam is an example of an input device for video input. A mouse is also an input device but it is called a pointing device used to input data into a computer.

  22. Functions of input devices a) Input Devices for Texts Optical Reader and Bar Code Reader Keyboard Virtual Keyboard Enter data such as text and commands into a computer. You can press the keys of a virtual keyboard on the screen. a light source to read characters, marks and codes .

  23. b) Input Devices for Graphics Scanner Digital Camera captures images from photographic prints, posters, magazine pages and similar sources for computer editing and display. A digital camera allows you to take pictures and store the photographed images digitally.

  24. c) Input Devices for Audio Microphone Midi Keyboard Audio input is the speech, music and sound effects entered into the computer.

  25. d) Input Devices for Video Webcam Video Camera CCTV CCTV is a type of digital video camera that enables a home or small business user to capture video and still images. A webcam is a video camera that displays its output on a web page. A digital video camera allows you to record full motion and store the captured motion digitally.

  26. d) Pointing Devices Graphics Tablets Touch Screen Mouse Track Ball A pointing device is another form of input device. Pointing devices such as a mouse, trackball, graphics tablet and touch screen are used to input spatial data into the computer.

  27. Output Devices An output device is hardware that is capable of delivering or showing information to one or more users. An output device displays, prints and presents the results of a computer’s work.

  28. Types of Output Devices A display device is an output device that visually conveys texts, graphics and video information.

  29. A monitor is an example of an output device that can be used to display text. It can also display graphics and video. It is similar to a television set that accepts video signals from a computer and displays information on its screen.

  30. A Liquid Crystal Display (LCD) projectoruses its own light source to project what is displayed on the computer on a wall or projection screen. A digital light processing (DLP) projector uses tiny mirrors to reflect light which can be seen clearly in a well-lit room.

  31. A printer is an output device that prints text and graphics on a physical medium such as paper or transparency film.

  32. A photo printer is a colour printer that produces photo quality pictures. An image setter produces high quality output compared to an ordinary laser printer. An image setter is a high resolution output device that can transfer electronic text and graphics directly to film, plates or photo-sensitive paper.

  33. An audio output device produces music, speech, or other sounds. A pair of speakers is an audio output device that generates sound. The headphone is a pair of small speakers placed over the ears and plugged into a port on the sound card. A woofer or subwoofer issued to boost the low bass sound and is connected to the port on the sound card.

  34. STORAGE DEVICES

  35. What is computer storage?? Computer storage is the storing of data in an electromagnetic form to be accessed by a computer processor. HARD DISK PEN DRIVE CD-ROM DISKETTE

  36. Types of Computer Storage • Two types of Computer Storage: (i) Primary storage (ii) Secondary Storage

  37. Types of Computer Storage (i) Primary storage • The main memory in a computer. • It stores data and programs that can be accessed directly by the processor.

  38. Types Of Primary Storage Two types of primary storage which are: RAM ROM

  39. (ii) Secondary Storage • is another alternative storage to save yourwork and documents. • It is non-volatile. • It will store theinformation until it is erased.

  40. Types Of Secondary Storage: MAGNETIC MEDIUM OPTICAL MEDIUM FLASH MEMORY

  41. (1) Magnetic Medium • a non-volatile storage medium. • The devices use disks that are coated with magnetically sensitive material.

  42. Examples of magnetic storage are: (i) magnetic disk: - a diskette, used for off-line storage - hard disk, used for secondary storage DISKETTE HARD DISK

  43. (ii) magnetic tape: • video cassette • audio storage • reel-to-reel tape VIDEO CASSETTE REAL-TO REAL TAPE

  44. (2) Optical Medium • is a non-volatile storage media , holds content in digital form that are written and read by laser. • Examples: CDs and DVDs. CD

  45. 3) Flash Memory • is a solid-state, non-volatile, rewritable memory. • also called USB drive. • Example: Flash memory cards, flash memory sticks & thumb drive. THUMB DRIVE MEMORY CARD

  46. Bit Byte Kilobyte (KB) Megabyte (MB) Gigabyte (GB) Units for Data Measurement

  47. Basic terminology: • 8 Bits = 1 Byte • 1024 Byte = 1 KB • 1,048,576 Bytes = 1024 KB = 1 MB • 1,073,741,824 Bytes = 1024 MB = 1 GB

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