Transcript Electronic Workshop for K-12 ppt

Electronic Workshop
Electrical Circuits
Dr. Sandra Cruz-Pol
Professor
Electrical & Computer Engineering
UPRM
http://www.whyistheskyblue.org/why-is-the-ocean-blue.html
Once upon a time…
E produces H, and vice versa! E=>H Discovery
by professor Oersted’s demo!
Can H=>E ? Finally 11 years later…YES!!!
Used in generating electricity
First DC –Thomas Edison – not so good
Then AC – Nikola TESLA – GREAT!!
Invented ac motor, radio, design Niagara Falls generator,
distribution systems, fluorescence lamps, remote control,
wireless, logic circuits, 3 phasic and many modern things.
How a Motor works?
 http://www.walter-fendt.de/ph11e/electricmotor.htm
How an electric Generator works?
http://www.wvic.com/how-gen-works.htm
Electrical Circuits
It most have a closed loop
We will take a look at several electricity
components & concepts:
1. Resistors
2. Capacitors
3. Series & Parallel Connections
4. LED
5. IC… or chips
6. Batteries
7. Nodes
Meet the Concepts: Resistor
Resistors- reduce or
resist the flow of
electrons
0
1
2
3
4
5
6
7
Black
Black
Red
Orange
Yellow
Green
Blue
Purple
8
9
Gray
White
Series Connection
Try to connect a circuit the one below
using the color light bulbs provided
V= I R
Parallel Connection
Elements connect on both legs.
I=V/R
What is a Node?
How many nodes are in this circuit?
LED
Light emitting diodes (LED)
like regular light bulbs but
that are actually
semiconductors that shine
when an electrical current
passes through them in a
specific direction.
Low Power consumption! 
http://www.kpsec.freeuk.com/components/led.htm
+
What is a circuit Board?
Nodes?
Electronic Doorbell
Switch
Speaker
Electro-magnet
***Warning!! It can get HOT.
Capacitors
Capacitors
store
electrons
http://www.kpsec.freeuk.com/components/led.htm
Electric Circuit
Discharging a capacitor
Charge/discharge Capacitor
Piezoelectric
material
Chip – (integrated circuits)
The 555 timer regulator pin layout (from http://www.doctronics.co.uk/555.htm)
1k
C1
C2
C (mF) Frequency
(Hz)
.100
111
.068
170
C3
C4
C5
.047
.033
.022
230
348
490
C6
C7
.015
.010
718
1,173
Myth: Why is the Ocean Blue?
FALSE: The ocean is blue
because the sky reflection
on its surface.
TRUE: Water is blue.
frequency spectra
 But you need a huge
amount of it to really see
its color.
 Look at a swimming pool
as it gets deeper; even on
cloudy days.
http://ece.uprm.edu/~pol/OceanBlue.html
Myth #2
 FALSE: Thomas Edison, greatest contributor to Electricity and
systems used today.
 TRUE: Nikola Tesla – greatest contributor to Electricity.
Invented ac motor,
perfected dc motor,
invented radio transmission, (wireless)
designed Niagara Falls generator,
distribution systems,
fluorescence lamps,
remote control, wireless,
logic circuits,
3 phasic and many others.
Where to find this material?
http://ece.uprm.edu/~pol/outreach.html
Also look at:
http://casa.ece.uprm.edu
http://ece.uprm.edu/climmate