#
(In Alexander & Sadiku unless otherwise noted.)
at
Noon
on
5/09
at
3:30 PM
Turn
in at
final
exam
Some students have been working ahead.
Thus an opportunity for each student to earn
extra credit to be added to your overall
homework points, offsetting points lost on
regular assignments.
Optional Reading, 13.6, Review 13.5, 13.7.
13.67, 13.72
Note errata on page 580, Fig. 13.43.
Note errata on the answer to 13.67.
at
5:00
PM
Turn
in at
class
or by
5:00
PM
slide
under
office
door
SB1638
three-phase transformers
Review 13.5,
Read 13.7, especially Example 13.12
Do
Note errata on Problem 13.73 and its answer.
Optional: What is inside a wind turbine?
(This is the last homework assignment for this course.)
This assignment will be handed back on Monday, 5/07, or
earlier via the bin near Prof. De Boer's office door. You
will get an e-mail when it is ready for pick-up.
Read 13.5
Do
Optional: Read 13.1, 13.2, 13.3, 13.4
Optional: Powerline Maintanance via helicopter
Optional: Autotransformer rebuild
Optional: Oil-filled transformer explodes
Optional: Replacing a light bulb (KDLT tower)
Optional: Install antenna, Willis (Sears) tower
Read 12.7, 12.10, 12.11
Note errata in Sec 12.10
Note errata on Page 535
Do
Hint: "Mind your P's and Q's."
Note errata on Prob 12.67
Optional: Coal-Fired Generating Station
Optional: Do not try this! The mention of
30 volts in the video is a guideline that is
written in some electric codes. Working at
less than 30 volts is not a garantee of safety!
Optional:"Transistors: How do they work?"
Optional: Hidden Behind Every Scene and lyrics
Optional: Speak O Lord
Y-Δ V and I relations
Read 12.4, 12.5, 12.6
Do
Note errata on Prob. 12.11
Note errata on the answer to Prob. 12.21
Optional:
Smart license plates
Loudspeaker manufacturing
Another Loudspeaker video
Virtual Neutral
Review class notes on terminology
Read 2.7 on p51-57, 12.3
Do
Note errata on Prob. 12.7
Optional: "How to wire a split-phase elec. panel"
Optional: "How to add a Circuit Breaker"
Note: Never! open! a! live! panel!
This guy should have turned the power
off first, and he should be wearing safety
glasses and other personal protective
gear at least until he can make measurements
to prove that the busses are de-energized.
See "arc blast" tutorials.
Note: On 4/23 at 10:36 PM Prof. DDB moved
Problem 12.11 from this assignment to the next.
Residential and farm wiring
Introduction to 3 phase pwr—smooth power
Read 11.9, 11.10, 12.1, 12.2
Do
Note errata in Problem 11.84
Note errata in Figure 12.5
Optional Reading: more on "Split-Phase" and on
"High-Leg Delta" (Used to provide 120 V
split-phase and 240 V three-phase with one
electrical service entrance to the premises.
Optional: Three-phase power from single phase
Leading and lagging power factor.
Conservation of avg pwr, reactive pwr
Power factor correction
Review 11.6, Read 11.7, 11.8
Do
Note errata in the answer to Problem 11.63
(This errata link was posted here on 3/25)
Optional:
Municipals: The Power of Community
Investor Owned: Powerful Profits
Cooperatives: Buckeye Power
Note: there are also federally owned and
privately owned utilities.
Read 11.5, 11.6
Do
Note errata to the answer to Problem 11.47
Note errata on page 469, definition of pf
Review 11.4
Do
also do 11.32, 11.36
Problem 11.27 continued.
(b) What reading will a perfectly accurate
"True RMS" DMM show?
(c) What reading will a perfectly accuarate
"RMS calibrated, average rectified
value responding" DMM show?
Optional: Prof. Overbye on the 2003 blackout
Review 11.1, 11.2
Read 11.4, class notes
Do
Opt'l: Yet another video on "power savers" here.
AC power overview, avg and reactive pwr
Review Chapter 10 as needed
Read 11.1, 11.2
Do
Optional: What do you think of this video "You see it's aah... drawin' about two amps of power... now I'm gona plug this in... and it's gone down to about one and a half amps of power..." (Quotation from the video.)?
If you liked that one, you might also like this one! "...converts one power source and puts it into four, each costing 25% of the electricty..." (Quotation from the video.)
We can discuss these claims in class if you like.
Read: 10.1, 10.2, 10.3, 10.4, 10.5
Do:
Optional: The Joys of RPN
HP 35s vs. TI 36X Pro Comparison
Read 9.6, 9.7, 9.8, 9.9
Do
Hint for Problem 9.90: Use KVL but remember,
the magnitudes constitute the lengths of three
sides of a triangle. Sketch out the possibil-
ities (to scale). Then compute exactly using
the law of cosines.
Optional Videos: Capacitors and Inductors
Note a brief glitch in the above video. At
7:11 the lamp above the inductor should not
flash. It should stay dark, then slowly begin
brightening. The video is correct from 7:12
onward. The exact same situation is correctly
animated from 3:27 to 3:37.
Super Inductor Simple Joule Thief
Optional: More sensible explanation from
Wikipedia, Joule Thief
Good
Fri.
Read 9.3, 9.4, 9.5
Do
Optional: Bob Marley: Cornerstone
Optional: Psalm 118 (Good Friday meditation)
Optional: Spin welding of plastic
Read App. B on pages A-9 through A-15
Do
Note errata on the answer to Problem 9.1
Optional videos:
A.) A non-conventional intro. to complex #s
B.) A conventional lecture on phasors ~38 mins.
Note two typos in the above lecture on phasors.
1.) at 5:45 "cos(ωt +
/2)"should be "cos(ωt + /4)"2.) at 21:58 in two instances, the word "conductive" in
blue text should be replaced by "capacitive" in blue text.
Sinusoids
Read 8.8, 8.12, 9.1, 9.2
Do
Note errata on the answer to Problem 9.1(d)
Hint for 8.67: Use the operator method
Note trigonometric identities in Appendix C.
Optional: Read 8.10, 8.11
Optional videos on internal combustion engines:
Transparent, or Tutorial, or Teardown
application to step response.
Review 8.1 – 8.3, Read 8.4, 8.5, 8.7
Do
from 2 Ω to 1 Ω, 8.61, optional evaluation (link)
Hint for 8.61: Use the operator method
Optional: Mid-term evaluation of instruction
Results of the evaluation
Optional: Another Prof's notes, operator method
Optional: Read 8.10, 8.11
Optional:
DVD at the DC Library: "Flash of Genius"
You Tube trailer; Rotten Tomatoes review
✽"Too much technical information about circuit boards,
Motorola transistors. . ." —Rex Reed
(Hmm. . . Sounds fresh to DDB, not rotten!)
☻"Ethics is at the heart of this David and Goliath
story. . . " —Louise Keller
(DDB's found it a worthwhile entertainment too!)
☻"The most gripping movie about… windshield wipers
you will ever see. Take that any way you care to."
—Bob Strauss
Review 8.2, Read 8.1, 8.2, 8.3, 8.5, 8.6
Note errata on Practice Problem 8.8
Do
Note errata on Problem 8.5
Optional: Dooyeweerd: Theory of Reality
Optional: Over and under coiling of a cable
Optional: Another over-under video
Review Ch 7
Do
Optional: Spectrogram of Dial-up modem
Optional: Another graphic analysis of dial-up
Optional: The above, annotated, in slow motion
Step response of RC, RL circuits
Sequential switching of RC, RL circuits
Read 7.4, 7.5, 7.6, 7.9, 7.10
Do
Note errata on Problem 7.28 and the
Answer to Problem 7.31(a)
Note: On 3/08 at about 11:20 AM Prof. De Boer deleted
Problem 7.39 from this assignment and added it to
the plan for the next assignment.
Optional: Neon Oscillator
Optional: Neon Flicker Panel
Optional: Another Neon Flicker Panel
Read 7.3
Do
Note errata on answer to Problem 7.15
Note: On 3/06 at about 8:00 PM Prof. De Boer deleted
Problem 7.27 from this assignment and added it to
the plan for the next assignment.
Optional: Fun with a high-voltage capacitor
Optional: Why is My Guitar Rig Buzzing?
Optional: Electric Guitar Modification
First-Order Circuits, RC Circuits
Read 6.6, 6.7, 7.1, 7.2
Do
Note errata on answer to Problem 6.67
Optional: How a TV Works (in slow motion)**
Optional: Reacting to the above video
**In the How a TV Works video there is an error at
about 10:37. The phrase, "voltage passing through
it" should be "current passing through it."
(Remember, voltage is across two nodes, current
flows through circuit elements.)
Optional: How the kg is being redefined
Optional: Grace in weights and measures Pt 1
Optional: Grace in weights and measures Pt 2
Optional: Revelation 21:23-25
Optional: I want to walk as a child of the light
series and || combinations of inductors
Read 6.4, 6.5
Do
Note errata on Problem 6.64
Optional: Railgun demonstration
Optional: How a railgun works.
Optional: Dordt's IEEE society railgun
series and || combinations of capacitors
Read 6.1, 6.2, 6.3
Do (page 240)
except change the 60 V source to 40 V and
change he 20 Ω resistor to 50 Ω,
also do 6.21
them in with this assignment as homework.
Optional: Primer on music synthesizers
Optional: Patching a music synthesizer
Optional: Fugue in G Minor (on a synth.)
Optional: Fugue in G Minor (earlier type of
synthesizer.)
Review 5.8, class notes from 2/23
Do
Hint for 5.66: Nodal analysis looks messy since
there are so many nodes, but actually it turns
out to be easy due to the voltage sources and
the grounded non-inverting inputs to the op-
amps. There are only two nodes at which full
KCL equations are needed. Also, perhaps this
problem is a good review of nodal analysis.
Optional: David Jones, on "the world's most
popular You-Tube channel,"* speaks on op-amps.
Note: The video has a sign error at 22:30.
The correct formula is Av = –RF/R1 or |Av| = RF/R1.
Dave notices the error and fixes it at 31:38.
Optional video on encabulator technology.
Optional reading on encabulator technology.
Optional transcript of a "Plumbline" KDCR radio
report on the the progress of encabulator work
here at Dordt College. (Originally broadcast
on 4/1/53.*)
* not really
Read 5.7, 5.8, 5.10
Do
Optional: View this animated tutorial From ASU
on the topic of the ideal op-amp.
The tutorial uses the word impedance. This is a
generalization of resistance. We will study impedance
later in this course. For now, just consider it to mean
the same thing as resistance. (Z = R)
Read 5.4, 5.5, 5.6
Do
Hint for 5.19: How might Thevenin's thm help?
Note errata on the answer to 5.39.
Optional: Over-and-Under Coiling of a Cable
Optional: Another Over-and-Under Video.
Use the time to study for the test on 2/14.
Read 5.1, 14.3 (pages 615-7), 5.2, 5.3
Do
Note: In Problem 5.9 the op-amp's gain, A and
the input resistance, Ri are not specified.
Whenever this is the situation, assume an ideal
op-amp.
Optional: Biography on Léon Charles Thévenin.
Optional: Thevenin's theorem in pop culture.
Optional: If you are looking for an internship
consider this advice on career fairs.
Dress code information
How to dress for a job interview (men)
How to dress for a job interview (women)
It does not cost a fortune to look like $1M.
Read 4.8, 4.10
Do
Optional: Diesel engine governors explained
Optional: Find out about power steering.
Norton's Theorem
Read 4.4, 4.5, 4.6
Do
Optional:
Remembering Ray Dolby, 1/8/1933–9/12/2013
"Above all else, guard your heart, for everything you do
flows from it." — Proverbs 4:23 (NIV)
"I think a lot of developments start with the desire of
the developer to get what he really wants so that he can
use it. It's not just the technical fascination or the
business opportunity." —Ray Dolby
Ray Dolby, pioneering sound engineer, dies at 80
—San Francisco Chronicle
Retrospective Web site (includes a video)
—hosted by Dolby Labs
Optional video: Mandelbrot Zoom
Optional video: Mandelbrot: How it works
Optional video: Even more on Mandelbrot
Read 4.1, 4.2, 4.3
Do
Note on Problem 4.3: For full credit on you
must use linearity for parts (b) and (c).
Note on Problem 4.6: For full credit you must
explain (use a sentence or two) how you got
your answers.
Note errata on the answer to Problem 4.9
Optional video: How NOT to blow up your scope!
Optional video: Cosmic Eye (2011, original)
Optional video: Cosmic Eye (Creation Calls)
Reveiw 3.1 – 3.5, Read 3.7, 3.9
Do
Note errata on page 103
(This errata note added on 2/23)
Optional video: The Mechanical Monsters
What do we hope for?
Besides which, they are rather electrical monsters too!
Optional: Technology is Imagination Incarnated
Mesh, Supermesh
Read 3.4, 3.5.
Do
Note errata on Problem 3.34.
Hint for Problem 3.44: Re-draw with 4 A source
on an outside edge.
Note: we will skip Section 3.6 in the textbook.
It is optional reading however. Some students
find the method in Sec. 3.6 to be tricky (bad).
Others love it. "Your mileage may vary."
Optional: Why become an engineer? Watch this
short film titled Design Our Future.
Prof. De Boer does not endorse every statement made
in this video, but it does provoke thought.
(The link at the end of the video is defunct. A similar
link ending in ".info" instead of ".us" is a phishing
site—don't go there!)
Review 3.1, 3.2, Read 3.3
Do
Optional video ~3 minutes: "Every question
harbors a latent question." (What if?)
Read 3.1, 3.2 in your textbook
Optionally review Sections 7, 8, 13 in IEE.
Do (p 112 ff)
Optional: Interview tips from GE
Optional viewing: A Mighty Fortress is Our God
Review Sections 2.5, 2.6
Optionally review Sections 13, 14, 15 in IEE.
Do (p 69 ff)
Note: In problem 2.26, assume there is a
current source of ix amps pointed upward and
connected on the left side of the given schematic.
Optional:
Video lecture: The Passive Sign Convention
Video lecture: Passive Sign Cnvntn Examples
Note: The passive sign convention is easy once you
clearly understand it. However, there are lots of bad
descriptions of it floating around on the Internet.
Stick with the IEE handout, the videos above, or ask in
class rather than searching the Internet yourself on
this matter.
Optional: The Future of Electricl Engineering
Optional: Mike Vander Wel, Egr Class of 1989.
“I’ve been in classes in a business environment
with almost every educational institution out
there, from M.I.T. on down. And the reality is,
if you come with the right worldview, hard work
ethic, and the right kind of academic training—
which is what Dordt provides—then you can
hang with anybody." — M. Vander Wel
Optional: AM Radio tutorial.
Optional: Three- and four-way switches.
Optional: Practical wiring of 3-way switches
Optional: Practical wiring of 4-way switches
See
note
1
below
Read: 2.8, 2.9 in your textbook
Read Switch in Wikipedia
Review: Sections 9, 10, 11 in the IEE handout.4
Do these problems starting on page 74:
2.69, 2.74
Optional Video: Wat?
See
note
2
below
See
notes
3 & 4
below
voltage, resistance, power, KVL, KCL
Scan Chapter 1 and Chapter 2 through
Section 2.6 in your textbook
Review sections 1 though 8 in the handout,
"An Introduction to Electrical Engineering."4
Do these end-of-chapter problems in your <
textbook starting on page 24:
and starting on page 66, Problems:
Note errata in your textbook on
Practice Problem 2.11