Electronic Technology
Welcome to Lesson #1
DC Review – LU 1101
(with Mr. Cooper)
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Lesson Plan – Kevin C. Cooper
Electronic Technology – LU 1101- Introduction and DC Review
First Cycle Objectives – Pg. 1 of 2 - Students will:
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List items required for daily shop activities.
List the 10 most important shop rules.
Identify and follow all safety rules.
State the procedure for extra help and make up.
Review the shop grading policy.
Review Basic Atomic Structure.
Review Ohm’s Law, Watt’s Law, Kirchoff’s Laws.
Review resistor networks and the use of DVOM’s.
Calculate, construct and test series circuits.
Calculate, construct and test parallel circuits.
Lesson Plan – Kevin C. Cooper
Electronic Technology – LU 1101- Introduction and DC Review
First Cycle Objectives – Pg. 2 of 2 - Students will:
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Calculate, construct and test combination circuits.
Troubleshoot various faults in DC circuitry.
Simulate various DC circuits on computers.
Practice clean, safe, mature, proper use of lab
equipment.
Maintain complete, accurate, neat, permanent notes.
Write a “Type-5” technical Lab Report.
Develop a list of on-line resources.
Begin an electronic student portfolio.
Pass three written tests. (Safety, Series, Parallel)
Identify schematic symbols and diagrams, reactive
components, time constants, complex DC circuitry.
Things you need every day!
• Clean Shop Tee Shirt or Shop Sweat
Shirt......every day, no exceptions!!!
• Notebook (3 ring binder with paper).
• Scientific Calculator.
• Pencil and Pen.
• Text Book.
• Items specified in your student handbook.
• Small hand tools and Safety Glasses.
• BRAIN.
Shop Rules
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Follow dress code. (Shop Shirts, No Jackets…)
Maintain a business like atmosphere.
No horseplay or throwing things.
No video games or illegal software.
Follow safety rules.
Take and keep all notes.
Clean the lab every afternoon.
Respect the property of others.
No food in the lab.
No talking while the instructor is talking.
Things you need to know:
• Mr. Cooper is available for extra help after
school every day upon request.
• If you are absent for one day, get the notes
you missed from another student, and the
lab you missed from Mr. Cooper as soon
as possible.
• If you are not sure what to do, ask your
instructor. There are no stupid questions.
• Request extra help before you fall behind.
Grading Policy
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Student Written Notebook: 10%
Student Electronic Portfolio: 10%
Daily Theory & Book Assignments: 10%
Daily Computer & Web assignments: 10%
Daily Lab Circuits & Experiments: 20%
Weekly Written Tests: 20%
Weekly Lab Reports: 20%
Extra projects & missions: +/- 10%
Meet this awesome atom.
Notes on Mr. Atom:
• All materials are made of atoms.
• Protons and Neutrons reside in the
Nucleus.
• Electrons orbit around the nucleus at the
speed of light.
• Current flow is the movement of free
electrons.
• Like charges repel, unlike charges attract.
(Coulomb’s Law)
More notes on Mr. Atom:
• The number of electrons in the valence shell
determines the electrical properties.
• Conductors have 1 – 3 valence electrons.
• Semiconductors have 4 valence electrons.
• Insulators have 5 – 8 valence electrons.
• Balanced atoms have an equal number of
protons and electrons.
• An atom that loses an electron is a positive ion.
An atom that gains an electron is a negative ion.
Mr. Ohm is our good friend!
• Ohm’s Law defines the relationship between
Current, Voltage, and Resistance.
• Ohm’s Law states that current is directly
proportional to voltage and inversely
proportional to resistance.
• Current flow is the movement of free electrons
(from negative toward positive). The unit for
current flow is the Ampere. The letter “I” stands
for Current. Ex: I = 1.5 A.
Mr. Ohm is so cool!
• Voltage is the force that moves electrons.
The unit for voltage is the Volt. The letters
“E” and “V” both stand for Voltage.
• Resistance is the opposition to current
flow. The unit for resistance is the Ohm
(shown as the Greek letter Omega). The
letter “R” stands for resistance.
• Formulas you need to know forever:
E=I*R, I=E/R, R=E/I.
Mr. Watt is also very cool!
• P = Power in
Watts. P=I*E
• Here’s those
groovy magic
pies again!
• Note: E = V
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Note: There are three power
Formulas…
P = I*V, P = I^2*R, P = E^2/R
Metric Prefixes are great!
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Mega = 1,000,000 = 1 EE 6 = M
Kilo = 1,000 = 1 EE 3 = K
(Units Volt, Ohm, Amp have no exponent.)
milli = 0.001 = 1EE-3 = m
micro = 0.000 001 = 1 EE-6 = u
nano = 0.000 000 001 = 1 EE-9 = n
pico = 0.000 000 000 001 = 1 EE-12 = p
Color
First Stripe
Second Stripe
Third Stripe
Black
0
0
x1
Brown
1
1
x10
Red
2
2
x100
Orange
3
3
x1,000
Yellow
4
4
x10,000
Green
5
5
x100,000
Blue
6
6
x1,000,000
Purple
7
7
Gray
8
8
White
9
9
Fourth Stripe
Gold
5%
Silver
10%
Lots of Resistors!!!
• Series resistors: Rt=R1+R2+R3
• Parallel resistors:
Rt=1/(1/R1+1/R2+1/R3)
LOVE YOUR METER!
• An ammeter must be
connected in series to
measure current!!
• A voltmeter is connected
in parallel to measure
voltage!
• An ohmmeter must never
be connected to a “live”
circuit when measuring
resistance!!
Series circuits are very exciting!
• Current flow is constant in
series.
• Voltage drops add up to
the total voltage.
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Rt = R1+R2+R3
It = Et/Rt
It = IR1 = IR2 = IR3
ERx = IRx*Rx
PRx = IRx*ERx
Calculate the EIRP values!
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1. Rt=R1+R2+R3=3K-Ohms
2. It=Et/RT=4mA
3. It=IR=IR2=IR3=4mA
4. ER1=IR1*R1=4V, ER2=IR2*R2=4V,
ER3=IR3*R3=4V
• 5. P=I*E=16mW each=64mW total
Parallel circuits are super
awesome!
• Voltage drops in a
parallel circuit are
constant.
• Branch currents in a
parallel circuit add up to
the total current.
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1. Et=ER1=ER2=ER3
2. IRx=ERx/Rx
3. It=IR1+IR2+IR3
4. RT=ET/It
5. PRx=IRx*ERx
Calculate the EIRP values!
• 1. ET=ER1=ER2=ER3=12V
• 2. IR1=ER1/R1=1mA, IR2=ER2/R2=1mA,
IR3=ER3/R3=1mA
• 3. It=IR1+IR2+IR3=3mA
• 4. Rt=Et/It=4K-Ohms
• 5. P=I*E=3mW each=9mW total.
• Check: RT=1/(1/R1+1/R2+1/R3)
DC Review Assignments:
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Assignments:
Read Chapters 1 – 8.
Do Chapter Self-Tests. (1-8) Write Q&A.
Open Basic Circuit Challenge.
Do the following assignments. Have your
instructor verify and record each assignment
before proceeding to the next.
• Color Code, Ohm’s Law 1, Ohm’s Law 2, Power
1, Power 2, Series Sources, Series 1, Series 2,
Parallel 1, Parallel 2, S-P 1, S-P 2.
More fantastic DC circuits!
• Do the following assignments. Have your
instructor verify and record each
assignment before proceeding to the next.
• Open DC Circuits Challenge.
• Complete: Series 1,2,3; Parallel 1,2,3;
Series-Parallel 1,2,3,4,5; Basic Networks;
TS Series; TS Parallel; TS S-P.