electronic workshop electrical circuits dr. sandra cruz-pol professor electrical & computer...
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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