Electronic Workshop

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Electronic Workshop
Electrical Circuits Dr. Sandra Cruz-Pol Professor
Electrical Computer Engineering UPRM
http//www.whyistheskyblue.org/why-is-the-ocean-bl
ue.html
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Once upon a time

• E produces H, and vice versa! EgtH Discovery by
  professor Oersteds demo!
• Can HgtE ? Finally 11 years laterYES!!!
• 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.

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How a Motor works?

• http//www.walter-fendt.de/ph11e/electricmotor.htm

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How an electric Generator works?

• http//www.wvic.com/how-gen-works.htm

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Electrical Circuits

• We will take a look at several electricity
  components concepts
• Resistors
• Capacitors
• Series Parallel Connections
• LED
• IC or chips
• Batteries
• Nodes

It most have a closed loop
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Meet the Concepts Resistor
0 Black
1 Black
2 Red
3 Orange
4 Yellow
5 Green
6 Blue
7 Purple
8 Gray
9 White
Resistors- reduce or resist the flow of
electrons
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Series ConnectionTry to connect a circuit the
one belowusing the color light bulbs provided
V I R
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Parallel Connection
Elements connect on both legs.
I V / R
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What is a Node?
How many nodes are in this circuit?
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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
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What is a circuit Board?
Nodes?
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Electronic Doorbell
Switch
Speaker
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Electro-magnet
Warning!! It can get HOT.
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Capacitors
Capacitors store electrons
http//www.kpsec.freeuk.com/components/led.htm
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Electric Circuit
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Discharging a capacitor
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Charge/discharge Capacitor
Piezo-electric material
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Chip (integrated circuits)
The 555 timer regulator pin layout (from
http//www.doctronics.co.uk/555.htm)
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1k
C (mF) Frequency (Hz)
C1 .100 111
C2 .068 170
C3 .047 230
C4 .033 348
C5 .022 490
C6 .015 718
C7 .010 1,173
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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
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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.

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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