Electronic Workshop Electrical Circuits Dr. Sandra Cruz-Pol Professor Electrical & Computer Engineering UPRM .

Electronic Workshop

Electrical CircuitsDr. 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 loopWe 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 Black

1 Black

2 Red

3 Orange

44 YellowYellow

5 Green

6 Blue

7 Purple

8 Gray

99 WhiteWhite

Series ConnectionTry 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?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

Speaker

Switch

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

Piezo-electric material

Chip – (integrated circuits)

The 555 timer regulator pin layout (from http://www.doctronics.co.uk/555.htm)

1k

C (F) Frequency (Hz)

C1 .100 111

C2 .068 170

C3 .047 230

C4 .033 348

C5 .022 490

C6 .015 718

C7 .010 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.eduhttp://ece.uprm.edu/climmate