This is a presentation I pulled together and presented to a class of 4th graders. The purpose was to give them greater insight into how what they were learning (electrical circuits & switches) had everyday importance for communicating.

1. Circuits, Switches and everyday Communications

2. before we talk about circuits…

3. or switches

4. we communicate Bakugan Brawl!

5. Put them together What are some of the ways we communicate?

6. Making paper. What are they doing in this picture? Paper was invented in 105 AD.

7. Making paper 101

8. Moveable type, Printing Press, 1450 Moveable type

9. Other uses…  /  Take that!!!

10. Communicate over long distances

12. Circuits & Switches Electricity too….

14. Otto Von Guericke Invented the “elektrisiermaschine” or the first power generator

16. wow… wow… wow…

17. Journaling Experiments Experimentation or Tinkering

18. Journal your results

19. Samuel Morse Telegraph

20. Morse Code

21. Telegraph Operator That will be a $1.09 please

22. http://www.youtube.com/watch?v=l882xbFywho

23. Alexander Graham Bell

25. sound waves A B over a wire

29. Too many lines

30. Switch operators

32. the old solution

33. You probably drive by them everyday

34. Public Switched Telephone Network (PSTN) Tandem Switch Leominster Westford KEY Signaling Voice Path Tandem Switch yada, yada, yada Central Office Switch Central Office Switch Signaling Switch

35. Communications built on fundamentals

36. A Circuit Network Signaling System 7 (SS7) Central Office Switch Central Office Switch Public Switched Telephone Network (PSTN) A B sound over electricity

37. All of what we’ve spoken about also allows you to access the World Wide Web… … but that’s for another time.

38. Thank You