Intro To Computer Hardware


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Intro To Computer Hardware

  1. 1. Intro to Computer Hardware Mr Arthur
  2. 2. Aims of the Lesson 1 <ul><li>To discuss computer hardware and software </li></ul><ul><li>To examine the difference types of Input and Output devices </li></ul><ul><li>Quickly finish folder labels and print </li></ul><ul><li>Research different input and output devices </li></ul>
  3. 3. Computer Systems <ul><li>Hardware </li></ul><ul><ul><li>All the Physical parts of a Computer System (the bits that you can see and touch) </li></ul></ul><ul><li>Software </li></ul><ul><ul><li>Software is a collection of programs that help the computer hardware to work properly </li></ul></ul>
  4. 4. The Computer System Input Devices Processor CPU Output Devices Backing Storage Devices Main Memory RAM and ROM
  5. 5. Input Devices <ul><ul><li>Keyboard </li></ul></ul><ul><ul><li>Graphics Tablet </li></ul></ul><ul><ul><li>Touch-Sensitive Screen </li></ul></ul><ul><ul><li>Mouse </li></ul></ul><ul><ul><li>Microphone </li></ul></ul><ul><ul><li>Digital Camera </li></ul></ul><ul><ul><li>Digital Video Camera </li></ul></ul><ul><ul><li>Webcam </li></ul></ul><ul><ul><li>Trackball </li></ul></ul><ul><ul><li>Trackpad </li></ul></ul><ul><ul><li>Joystick </li></ul></ul><ul><ul><li>Scanner </li></ul></ul>The Physical Parts of a Computer System which allows data to be entered into a Computer System
  6. 6. Output Devices <ul><li>An output device is a device which allows data to be displayed or passed out of a computer system </li></ul><ul><li>Printers </li></ul><ul><ul><li>Laser </li></ul></ul><ul><ul><li>Inkjet </li></ul></ul><ul><li>Monitor </li></ul><ul><ul><li>Liquid Crystal Display </li></ul></ul><ul><ul><li>Thin Film Transistor </li></ul></ul><ul><ul><li>Cathode Ray Tube </li></ul></ul><ul><li>Plotter </li></ul><ul><li>Load speaker </li></ul><ul><li>Projector </li></ul>
  7. 7. Lesson Starter – 25 th August <ul><li>What is the difference between hardware and software? </li></ul><ul><li>Give 3 examples of input devices </li></ul><ul><li>Give 3 examples of output devices </li></ul><ul><li>What is the name of the input device where you draw on a board and it is inputted into the computer system </li></ul>
  8. 8. Aims of the Lesson 2 <ul><li>Laser v Inkjet printers </li></ul><ul><li>Comparison of printers </li></ul><ul><ul><li>Speed </li></ul></ul><ul><ul><li>Resolution </li></ul></ul><ul><ul><li>Cost </li></ul></ul><ul><ul><li>Running costs </li></ul></ul><ul><li>Finish off Input/Output poster </li></ul>
  9. 9. Laser V Inkjet Printer <ul><li>A laser printer uses a laser beam to project to a drum. It then attracts toner (powder) and transfers it to paper. </li></ul><ul><li>Inkjet printers produce printouts by firing tiny drops of ink at the paper. </li></ul><ul><li>They produce good quality printouts and can print onto plastic and CDs. </li></ul>
  10. 10. Comparison of Printers <ul><ul><li>Resolution (quality) = measured in dots per inch </li></ul></ul><ul><ul><li>Speed = measured in pages per minute (PPM) </li></ul></ul><ul><ul><li>Size </li></ul></ul><ul><ul><li>Cost </li></ul></ul><ul><ul><ul><li>Capital cost </li></ul></ul></ul><ul><ul><ul><li>Running cost </li></ul></ul></ul>
  11. 11. Lesson Starter – 26 th August <ul><li>What is the difference between an Inkjet and a Laser printer? </li></ul><ul><li>I want to buy a new printer. Give 3 characteristics you would use to compare printers </li></ul><ul><li>What is a printer’s resolution measured in? </li></ul>
  12. 12. Aims of the Lesson 3 <ul><li>To introduce backing storage devices </li></ul><ul><li>Random v Sequential data access </li></ul><ul><li>Storage capacities </li></ul>
  13. 13. Backing Storage <ul><li>We require backing storage to store programs and files </li></ul><ul><li>Without backing storage all our data would be lost when we turn the computer off </li></ul>USB Flash Pen 16Mb-16Gb DVD-Recordable 4.7-17Gb DVD-Rewriteable 4.7-17Gb DVD-ROM 4.7-17Gb CD-Recordable 700Mb CD-Rewriteable 700Mb CD-ROM 700Mb Hard Disk 20Gb-100Tb Floppy Disk 1.44Mb Magnetic Tape 10-100Gb Backing Storage Media
  14. 14. Direct V Sequential Access <ul><li>Direct </li></ul><ul><ul><li>This is when you can access you data in any order, for example, a hard disk </li></ul></ul><ul><li>Sequential </li></ul><ul><ul><li>This is when you have to access data in an order, one piece after another, for example, a tape </li></ul></ul>
  15. 15. Storage Capacities
  16. 16. Lesson Starter – 27 th August <ul><li>List 4 examples of backing storage devices </li></ul><ul><li>What is the difference between direct and sequential data access </li></ul><ul><li>I want to store a Powerpoint presentation that is 4Mb. Recommend a suitable backing storage device and give a reason for your decision </li></ul>
  17. 17. Aims of the Lesson 4 <ul><li>The processor (CPU) </li></ul><ul><li>Main Memory – RAM and ROM </li></ul>
  18. 18. The Processor <ul><li>The processor or C entral P rocessing U nit is the brain of the computer </li></ul><ul><li>The performance of the processor is measured in Giga Hertz (GHz) </li></ul><ul><li>We send programs to the processor to get the computer to do something </li></ul>
  19. 19. RAM and ROM <ul><li>Main Memory </li></ul><ul><ul><li>The Main Memory of a computer is used to store programs and data </li></ul></ul><ul><ul><li>The processor cannot store the whole program and needs its main memory to store parts of the program </li></ul></ul><ul><li>Types of Main Memory </li></ul><ul><ul><li>Random Access Memory </li></ul></ul><ul><ul><ul><li>Where programs is stored temporarily while the computer is on </li></ul></ul></ul><ul><ul><ul><li>The contents of RAM is lost when the computer is switched off </li></ul></ul></ul><ul><ul><li>Read Only Memory </li></ul></ul><ul><ul><ul><li>Where data and programs are stored permanently </li></ul></ul></ul>
  20. 20. Lesson Starter – 31st August <ul><li>Describe the purpose of the processor </li></ul><ul><li>List the 3 parts of the processor </li></ul><ul><li>What does RAM and ROM stand for? </li></ul><ul><li>What is the difference between RAM and ROM? </li></ul>
  21. 21. Aims of the Lesson 5 <ul><li>The Operating System </li></ul><ul><li>Begin the Word Processing unit </li></ul>
  22. 22. The Operating System <ul><li>The OS runs the minute the computer is switched on and controls all hardware and software on the system (Windows etc) </li></ul><ul><ul><li>It controls all input devices </li></ul></ul><ul><ul><li>It manages the sending of data to output devices </li></ul></ul><ul><ul><li>It manages the filing system </li></ul></ul><ul><ul><li>Controls security </li></ul></ul><ul><ul><li>Provides the HCI </li></ul></ul><ul><ul><li>It lets the user know of any errors </li></ul></ul>
  23. 23. Lesson Starter Quiz – 2 nd September <ul><li>What does the OS stand for? </li></ul><ul><li>What is the name of the OS that was developed by Bill Gates? </li></ul><ul><li>Give 3 functions of the OS </li></ul><ul><li>What is the difference between hardware and software? </li></ul><ul><li>Name the 2 different examples of monitors </li></ul>