Electronic Workshop

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. Resistors2. Capacitors3. Series & Parallel

Connections 4. LED5. IC… or chips6. Batteries7. Nodes

Meet the Concepts: Resistor

Resistors- reduce or resist the flow of electrons

0 Black1 Black2 Red3 Orange44 YellowYellow5 Green6 Blue7 Purple8 Gray99 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?

LEDLight 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.

CapacitorsCapacitors 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 111C2 .068 170C3 .047 230C4 .033 348C5 .022 490C6 .015 718C7 .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