Circuits, Switches and everyday Communications

before we talk about circuits…

or switches

we communicate Bakugan Brawl!

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

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

Making paper 101

Moveable type, Printing Press, 1450 Moveable type

Other uses…  /  Take that!!!

Communicate over long distances

How many pieces were sent during 2008? 1 Go-Zillion B. 254 million 201 Billion D. 5

1 Go-Zillion

201 Billion

Circuits & Switches Electricity too….

William Gilbert 1600 AD - first person to apply the term, “ electric ”.

1600 AD - first person to

apply the term, “ electric ”.

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

Benjamin Franklin Famous for _______________? flying a kite on a stormy day What he learned from the experiment was that “electricity” can be fluid or “flow” from one point to another. A B electricity

Famous for _______________?

wow… wow… wow…

Journaling Experiments Experimentation or Tinkering

Journal your results

Samuel Morse Telegraph

Morse Code

Telegraph Operator That will be a $1.09 please

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

Alexander Graham Bell

sound waves A B over a wire

In what year was the first telephone call ever made? 1 B. 2009 1872 D. 1701 Large pepperoni pizza, hold the anchovies please.

1

1872

Too many lines

Switch operators

the old solution

You probably drive by them everyday

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

Communications built on fundamentals

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

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

Thank You