Facilitator – Clicker Question

1. Facilitator – Clicker Question Which logic gate with give the truth table to the right? • AND • BUT • OR • NOR • NAND • XOR • NOT • The facilitator is not here.

2. Gatekeeper – Clicker Question Which logic gate with give the truth table to the right? • AND • BUT • OR • NOR • NAND • XOR • NOT • The gatekeeper is not here.

3. Timekeeper – Clicker Question Binary 1110 is equal to the decimal number ______ • 10 • 11 • 12 • 13 • 14 • 15 • 16 • The timekeeper is not here.

4. Recorder – Clicker Question Binary 1011 is equal to the decimal number ______ • 10 • 11 • 12 • 13 • 14 • 15 • 15 • The recorder is not here.

5. Chapter 4 Understanding Computers

6. Latch Input Flip-Flop Output 4.2.3 Basic Building Blocks • Memory • Flip-Flops • a circuit made with transistors and stores one bit of a binary number • SIMM - single in-line memory module • a large collection of flip-flops

7. 4.2.3 Basic Building Blocks • Memory • DIMM - dual in-line memory module • a larger collection of flip-flops • Disks and Hard drives • 1’s and 0’s are store in magnetic media

8. 4.2.3 Basic Building Blocks • CPU - Central Processing Unit • Clock • square wave voltage • Processors • Logic Gates (Made with Transistors) • AND, NAND, OR, NOR, NOT, XOR • (See chalkboard)

9. Electrical Engineering - Team Exercise • Logic Gate Investigations • What kind of logic gates are these? Datasheets

10. Team Exercise • Add these binary numbers: 1001 0111 + 0111 1001 • What 2 kinds of logic gates are needed for computer addition? Homepage

11. Example Problem • What would be the truth table for the logic circuit shown in figure 4.18(a)? A B Y

12. Example Problem • What would be the truth table for the logic circuit shown 14.8(b)? A B Y

13. Remember Your Team Roles • Recorder - doing the writing • Facilitator - keeping focus • Time Keeper - keeping track of time • Gatekeeper – encouragement

14. Team Exercise – 4 Minutes • What would be the truth table for the logic circuit shown below? A B X Y Note this is similar to the homework problem. Homepage

15. Team Exercise – 4 Minutes • What would be the truth table for the logic circuit shown below? A B X Y Note this is similar to the homework problem. Homepage

16. 4.4 Computer Programs • Algorithm • a step-by-step procedure for solving a problem or accomplishing an end • Flowchart • a graphical description of an algorithm

17. Flowchart Symbols Input/Output Start/Stop Branch Test Calculation Process Flow

18. Flowchart Example Begin (again?) Define the problem Read input Ask for more input yes Can I solve this? Can I solve this? What do I need to know? no no Not available at this time yes Solve the problem Output results End

19. Note... 1 or 2 of the following 4 flow charts will appear on the next exam. 2 are very similar to the homework.

20. Example • Sketch a simple flowchart that will find the sum of two number and their difference.

21. Example Each month, the electric company bills consumers according to the following schedule: Electricity Usage (kWh) Rate ($/kWh) Energy  1000 0.10 1000 < Energy  10000 0.08 Energy > 10000 0.06 Prepare a flowchart that calculates the bill for a customer.

22. Start Example: Prepare a flowchart that determines the volume and area of a cube in which the length of one edge increases from 1 to 10 meters in 1 meters increments. a = 1 V=a3 A=6a2 Output V, A a = a+1 Stop No a>10? Yes

23. Start Example: Sketch a flowchart that will find the smallest number in a series of 100 numbers. I = 1 Input N Min=N I = I+1 Yes I>100? Output Min No Input N Stop N<Min? No Yes

24. Project One Hints for your Notes

25. What a drag… • What are four ways to increase the tension in the cable between the drag racer and parachute?

27. SpaceShipOne captured X Prize

28. Drag Force The slope of FD versus v2 will give us k. Cp = Drag coefficient r = density of air A = cross sectional area of the object v = speed of the object

29. Project One Hints • Speed = Distance/Time Acceleration = Dv/Dt

30. Fg FD Drag Force…on the way up? • Free Body Diagram

31. FD Fg Drag Force…on the way down? • Free Body Diagram Homepage

32. Chapter 5 Introduction to Design

33. Drafting

34. Single Stroke Gothic Lettering

35. Engineering Drawing Skills • Line Quality • Lettering • Construction • Accuracy

36. Describing an Angle Bracket

37. Orthographic Projection • Orthographic drawings represent three dimensional objects in three separate views arranged in a standard manner.

38. Orthographic Views • You can adequately describe most objects with three orthographic views. • Front • Top • Right

39. Orthographic Projection

40. Converting to Orthographic

42. Orthographic Views Top Front Right

43. Line Types Visible Line Hidden Line Center Line Dimension Line Construction Line

44. Line Types

45. Sketching Techniques

46. Engineering Drawing Rules • Always use a Pencil. • Make all lettering the same size. • Use Engineering or Drafting Paper. • Be patient and deliberate.

47. Drafting Handouts

48. Lettering with Fractions

49. Orthographic Views • You can adequately describe most objects with three orthographic views. • Front • Top • Right

50. Sketching techniques • Use very light construction lines • “Box in” the rough outline of the object • Darken only the lines you wish to keep • Clean up the edges and rough spots