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Insructional presentation on parts on the computer and what they do.

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  1. 1. Computer Hardware It’s really not that “hard.” Created By: Karen Pruitt Weddington Middle School
  2. 2. The Case <ul><li>The computer's case is nothing more than its shell or a skeleton. </li></ul><ul><li>The case holds the computer together, cooling (with fans), and grounding the computer components through its steel. </li></ul><ul><li>Larger cases with a lot of expansion bays are preferable because you have lots of room to work inside your case and to upgrade with more components. </li></ul>Expansion Bays
  3. 3. The Power Supply <ul><li>The case and power supply are the most simple, yet very essential components of the computer. You could actually build a computer with no case, you'd have all the components strewn across your floor and vulnerable to damage. </li></ul>The power supply supplies the electrical power for a computer. Fan – Helps keep components cool. Plug for electrical cord Power Switch
  4. 4. The Motherboard <ul><li>The motherboard is like a big city with many streets and highways that connect all of the buildings together. Instead of streets and highways, the motherboard uses tiny electrical paths to connect each component of the computer together. These paths are called &quot;buses.&quot; The more buses that connect to a component, the faster it can operate. </li></ul>
  5. 5. Expansion Slots <ul><li>All of the basic circuitry and components required for a computer to function sit either directly on the motherboard or in an expansion slot of the motherboard or are connected with a cable. </li></ul>Expansion Slots
  6. 6. Expansion Cards Examples of types of expansion cards are Graphics cards , Sound cards, Network cards, Modems, Wireless network (such as WiFi) cards . Network Card Sound Card Graphics/Video Card
  7. 7. Network Card or NIC <ul><li>If you have high-speed Internet connection, you need a Network Interface Card if you want to connect your PC to the Internet or a network. </li></ul><ul><li>Most newer computers have a network interface built into the motherboard. </li></ul>Wireless NIC NIC Contacts that fit exactly into the expansion slots on the motherboard
  8. 8. Graphic/Video Cards <ul><li>Your video card (sometimes called a graphics card) determines what you see on your computer monitor. The better the quality of your video card, the better the quality of your visual display. You need a good video card, preferably one with a graphic accelerator for performing calculations, if you work with graphic and multimedia programs. </li></ul>Your monitor connects here.
  9. 9. Sound Cards Sound cards let your computer output, input and manipulate sounds. Connections Most sound cards adhere to Microsoft's standard for color coding the external connectors as follows: S/PDIF digital output (sometimes used as an analog line output for a center speaker instead) Orange Analog line level output for rear speakers. Black   Analog line level output for the main stereo signal (front speakers). Green   Analog line level input. Blue   Analog microphone input. Pink   Function Color
  10. 10. The CPU <ul><li>The CPU is the computer's control center. Think of it as the brain that does all the thinking (computation), thus it is called the Central Processing Unit. The actual CPU is about 1.5 inches square, yet it is the most critical part of the computer. Having a fast CPU (measured in Gigahertz) greatly aids in the overall speed of your computer. </li></ul>
  11. 11. Memory <ul><li>Random-access memory (commonly known by its acronym RAM) refers to data storage formats and equipment that allow the stored data to be accessed in any order -- that is, at random, not just in sequence. </li></ul><ul><li>In contrast, other types of memory devices floppy disks or CD’s) can access data on the storage medium only in a specific order due to the design. </li></ul><ul><li>RAM is typically erased when a computer is shut down. </li></ul><ul><li>The more RAM a computer has, the faster it will be. </li></ul>
  12. 12. Burner or CD – R <ul><li>This is a device that allows you to save data to a CD. Special CD-Rs are required for this. They also allow you to make backup copies of your CDs. There are a large variety of types, including CD-R or CD-R+RW. The latter has support for rewritable CDs that can be erased and rewritten to, while CD-R only drives can only write to their CDs once. </li></ul>
  13. 13. Floppy Disk - Floppy Disk Drive <ul><li>A floppy disk is a data storage device that is composed of a ring of thin, flexible (i.e. &quot;floppy&quot;) magnetic storage medium encased in a square or rectangular plastic wallet. Floppy disks are read and written by a floppy disk drive. </li></ul>
  14. 14. Input/Output Ports <ul><li>I/O stands for Input and Output. The most common device for input is the keyboard. When you type, you are putting information into the computer, which is known as input. The most common device for output is the monitor. </li></ul>
  15. 15. USB <ul><li>Universal Serial Bus is fast replacing parallel and serial ports as the standard for connecting output devices like modems, keyboards and scanners. </li></ul><ul><li>USB devices are Plug-and-Play, which means that your PC will recognize them when you plug them in without you having to restart your computer. </li></ul><ul><li>They are also 'hot-swappable', so it's safe to add and remove USB devices while the PC is on. </li></ul><ul><li>The connector is a small rectangular plug. </li></ul>A Flash Drive, a typical USB mass-storage device
  16. 16. Dots Per Inch (DPI) <ul><li>Dots per Inch is a measurement used both on monitors and printers. The measurements are done different ways though. The higher numbers on printers generally represent more detailed print quality (i.e. 1440x1440 would be very high resolution printing). The lower numbers on monitors represent clearer picture quality (i.e. .22 dpi would be a very high quality monitor). </li></ul>A close-up of the dots produced by an inkjet printer at draft quality. Actual size is approximately 0.25 inches square. Individual colored droplets of ink are visible; this sample is about 150 DPI. A 10×10-pixel image on a computer display may require many more than 10×10 printer dots to accurately reproduce, due to limitations of available ink colors in the printer.
  17. 17. The Monitor <ul><li>A TV-like tube that displays your computer's output. </li></ul>CRT Monitor (Cathode Ray Tube) Flat Panel LCD Monitor (Liquid Crystal Display)
  18. 18. Display Resolution <ul><li>Similar to DPI, the resolution is how many pixels can be displayed on the screen at once. </li></ul><ul><li>The resolution is measured in the number of pixels wide and high that the display is. </li></ul><ul><li>The most common resolutions are 640x480, 800x600, 1024x768, 1280x1024, and 1600x1200. </li></ul><ul><li>Higher resolutions provide better quality pictures, but also make text and images smaller because more information is squeezed onto the same size screen. </li></ul><ul><li>The size of the monitor is important when considering the resolution. </li></ul><ul><li>A 14&quot; or 15&quot; monitor is best with an 800x600 resolution. </li></ul><ul><li>1024x768 is best for 17&quot; monitors. </li></ul><ul><li>The resolution of an analog TV screen is 512x400; another reason why a computer's display is much better than a TV's. </li></ul><ul><li>Although, HDTV now reaches resolutions of 1280x720. </li></ul>
  19. 19. That’s all folks…