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View "55 Minute Alias" from You Tube.
Try this Java Applet, "Demonstration of Aliasing"
Try this Java Applet, "Sigma-Delta ADC Tutorial"
Optional: See this "multimedia article" from
IEEE Spectrum Online: "the Future of Music"
The IEEE linke gives a perspective on the
dynamic range in the master mix. For an
opposing point of view see this article which
claims compression, "can make pop recordings or
live sound mixes sound musically better. . ."
DC Motor Tutorial from MicroMo Electronics
Read sections 1, 2 and 3 of
"Control of Stepping Motors" by Douglas Jones
LCD multiplexing. Give particular attention to
1:4 multiplexing.
Do this problem:
Consider a 7-segment three-digit display as
described here (which is similar to the
display discussed in class).
a.) Draw (or copy) back-plane waveforms
in a vertically aligned style as shown in the
datasheet for 1:4 multiplexing.
b.) Draw the six front-plane waveforms needed
to display "304".
c.) Draw the waveform of the voltage across
segments a and f in the first digit.
d.) Based on the waveforms shown in part (c)
find the RMS voltage applied to segment a
and the RMS voltage applied to segment f
Note: From 3/24 through 3/31 at 8:14 am
"1:4 multiplexing was incorrectly shown as
"1/3 multiplexing" in two instances above.
Also review this tutorial on nios interrupts
Do these problems on interrupts
Do problems 2.1, 2.2 from the handout.
Hints on problem 2.1: Assume the source has
zero impeadance and that the main transmission
line is infinitely long with the tap located in
the middle of the infinitely long line. Assume
that it takes T seconds for the signal to
traverse (in one direction) the "short"
transmission line stub. The problem is all
about the reflections in the stub.
Hints on problem 2.2: When a wave-front arrives
at the tap a reflection is generated.
You can calculate the reflection coeficient at
the tap looking from a particular direction.
The new standing voltage then radiates in all
three directions from the tap. It is helpful
to keep track of events in time. For example
at 4T a reflection arrives at the source
and at the same time a reflection on the tap
arrives at the main line.
Study for test on Thursday, 2/19.
in the library (Select "books" on the library's
web page, then enter "Universal Serial Bus" in
the search box) or available from USB.org.
Do these short essays on USB.
Optional Reading: USB article in Wikipedia
Take this twenty-question quiz.
E-mail your quiz grade to DDB.
You are encouraged to repeat the quiz until
you get a perfect grade. Turn in only your
best grade.
Optional Reading
Do this problem:
Plot voltage vs. time of the Tx line in RS-232
for sending this text: "Z#" (without the
quotation marks, with a capital "Z"). Assume
±12 V signal voltages, 53 kbaud, eight data
bits, and one stop bit. Be sure to label your
axes properly. An ASCII table can be found in
many places, e.g. http://www.asciitable.com
Note that the illustration in the Wikipedia
reading does not have properly labeled axes.
Specifically the the independent axis lacks
scale and units.
Optional: Listen to a teletype machine.
Read "HTBasic GPIB Tutorial"
Read Getting Started with Altera's DE2 Board
Read Introduction to the Altera Nios II. . .
to students in this course). Instructions on
how to subscribe can be found on the EGR 304
courses@dordt page. Download the entire
January 2009 issue and SAVE it. On Thursday
in class describe the main points of an article
of your choice and explain why you chose it.
Write your summary on one side of one page of
paper or less.