Commit bd93f9b0 authored by Arash Sattari's avatar Arash Sattari

image problem

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The device is shown in Figure 22.
The ‘Single’ button shows the result of a single measurement (without averaging many).
</p>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w6/22.jpg" alt=""><br><b>Figure 22. </b>Tektronix MSO 2002B Mixed Signal Oscilloscope.</div>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w6/22.JPG" alt=""><br><b>Figure 22. </b>Tektronix MSO 2002B Mixed Signal Oscilloscope.</div>
<p>
I used a passive probe in the measurements. First, I checked the baud rate with the scope.
Figure 23 shows the signal for transmitting "U" and the baud rate measurement result. Baud rate measured using oscilloscope was 9.615kHz,
that was close to the configured serial baud rate (9600).
</p>
<div class="img-container"><img style="width: 800px;" src="../img/assignments/w6/23.jpg" alt=""><br><b>Figure 23. </b>Baud rate check.</div>
<div class="img-container"><img style="width: 800px;" src="../img/assignments/w6/23.JPG" alt=""><br><b>Figure 23. </b>Baud rate check.</div>
<p>
I used Arduino 'Serial Monitor' to send serial data. I typed in the characters ‘U’, ‘5’, '0' and ‘a’ and observed the the ASCII code for them in the serial format.
Figure 24 shows the data format when sent serially. According the data format, the order of the bits are a zero start bit, the 8 bit data form LSB to MSB and a one stop bit.
For example, binary code for “U” 01010101. The reading on the oscilloscope should be (from right to left) 0>1>0>1>0>1>0>1>0>1 (Fig. 23).
</p>
<div class="img-container"><img style="width: 600px;" src="../img/assignments/w6/24.jpg" alt=""><br><b>Figure 24. </b>Serial data format.</div>
<div class="img-container"><img style="width: 600px;" src="../img/assignments/w6/24.JPG" alt=""><br><b>Figure 24. </b>Serial data format.</div>
<p>
Figure 25 shows each of the characters ‘0’, '5' and ‘a’ as seen on the oscilloscope.
</p>
<div class="img-container"><img style="width: 900px;" src="../img/assignments/w6/25.jpg" alt=""><br><b>Figure 25. </b>ASCII code serial test.</div>
<div class="img-container"><img style="width: 900px;" src="../img/assignments/w6/25.JPG" alt=""><br><b>Figure 25. </b>ASCII code serial test.</div>
</div>
</div>
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We tested STM32 Nucleo-64 development board with STM32F401RE MCU and ESP32 LOLIN32 development board. We used Arduino IDE for programming the processors.
The table below shows the most important features of each of the programming boards:
</p>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w8/14.jpg" alt=""><br><b>Figure 14. Features of the programming boards.</b> </div>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w8/14.JPG" alt=""><br><b>Figure 14. Features of the programming boards.</b> </div>
<p>
An LED-blinking test was programmed on both development boards. For both cases, LED pin connection was done based on the pin number and the blinking test was run.
The LED-blinking code can be found <a href="https://gitlab.fabcloud.org/academany/fabacademy/2019/labs/oulu/students/marjo-leinonen/raw/master/docs/images/week09/Blink5000Delay/Blink5000Delay.ino"><b>here</b></a>.
The Video for the test with STM32 Nucleo-64 can be found from <b><a href="https://gitlab.fabcloud.org/academany/fabacademy/2019/labs/oulu/students/marjo-leinonen/blob/master/docs/images/week09/smtblink.mp4">here</a></b>.
</p>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w8/15.jpg" alt=""><br><b>Figure 15. a) STM32 Nucleo-64 and b) ESP32 LOLIN32 in the LED-blinking test (the photos were taken from <b><a href="http://fabacademy.org/2019/labs/oulu/students/marjo-leinonen/assignments/week09/">Marjo</a></b>’s page).</b> </div>
<div class="img-container"><img style="width: 700px;" src="../img/assignments/w8/15.JPG" alt=""><br><b>Figure 15. a) STM32 Nucleo-64 and b) ESP32 LOLIN32 in the LED-blinking test (the photos were taken from <b><a href="http://fabacademy.org/2019/labs/oulu/students/marjo-leinonen/assignments/week09/">Marjo</a></b>’s page).</b> </div>
<p>
For a simple test, like the above-mentioned one, both of the boards performed well with no challenge to the hardware,
although programmed with a high-level code like Arduino.
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<a href="https://www.smooth-on.com/tb/files/SMOOTH-SIL_SERIES_TB.pdf"><b>Smooth-SilTM 940</b></a> and
<a href="https://www.smooth-on.com/tb/files/Smooth-Cast_300q,_300,_305___310.pdf"><b>Smooth-castTM 300 Series</b></a>). Here is a short summary of what we learned:
</p>
<div class="img-container"><img style="width: 600px;" src="../img/assignments/w9/1.jpg" alt=""><br><b>Fig. 1. </b>Summary of material characteristics and applications.</div>
<div class="img-container"><img style="width: 600px;" src="../img/assignments/w9/1.JPG" alt=""><br><b>Fig. 1. </b>Summary of material characteristics and applications.</div>
<p>
Table 1 summarizes the main practical information for the three mentioned materials:
</p>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/1T.jpg" alt=""><br><b>Table 1. </b>Practical info for the three materials.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/1T.JPG" alt=""><br><b>Table 1. </b>Practical info for the three materials.</div>
<p>
We were given molds that were already made in last year’s Fab Academy to cast. The following figures show the process from start to end.
A few notes: The proportions should be weighted accurately. Mixing should be done until color traces of the compounds disappear.
Vacuum degassing with Smooth-Sil should not be forgotten.
</p>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/2.jpg" alt=""><br><b>Fig. 2. </b>Measuring the weight and mixing the cures.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/3.jpg" alt=""><br><b>Fig. 3. </b>Vacuum degassing.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/4.jpg" alt=""><br><b>Fig. 4. </b>Pouring and curing.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/5.jpg" alt=""><br><b>Fig. 5. </b>The result of molding and casting.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/2.JPG" alt=""><br><b>Fig. 2. </b>Measuring the weight and mixing the cures.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/3.JPG" alt=""><br><b>Fig. 3. </b>Vacuum degassing.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/4.JPG" alt=""><br><b>Fig. 4. </b>Pouring and curing.</div>
<div class="img-container"><img style="width: 500px;" src="../img/assignments/w9/5.JPG" alt=""><br><b>Fig. 5. </b>The result of molding and casting.</div>
</div>
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