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<h1><strong><span class="color">week_11</span></strong></h1>
<p class="lead"><strong>Output Devices</strong></p>
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<h2><strong>Assignments</strong></h2>
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<p>Propose a final project masterpiece that integrates the range of units covered, answering:</p>
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<span class="fa fa-dot-circle-o"></span>
<strong>1)</strong> - <em>Individual assignment: add an output device to a microcontroller board you've designed, and program it to do something</em>
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<span class="fa fa-dot-circle-o"></span>
<strong>2)</strong> - <em>Group assignment: measure the power consumption of an output device</em>
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<h2><strong>Stepping Motor</strong></h2>
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<p>
At first, I used the Arudino UNO to control the stepping motor to practice the output drivers. Connection line as shown:</p>
<p style="text-align:center"><img src="img/week_11/Picture01.jpg" class="img-responsive" alt="..."></p><br/>
<p>
The pin 8 in UNO board connection the IN1 in ULN2003, the pin 9 in UNO board connection the IN2 ULN2003, the pin 10 in UNO board connection the IN3 ULN2003, the pin 11 in UNO board connection the IN4 ULN2003. Then I programed in the Ardino.</p>
<p style="text-align:center"><img src="img/week_11/Picture16.jpg" class="img-responsive" alt="..."></p><br/>
<iframe width="691" height="640" src="https://www.youtube.com/embed/VykQHUjbDeE" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br/>
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<h2><strong>Hello.RGB.45</strong></h2>
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<h4><strong>Schematic Diagram</strong></h4>
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<p>
This week we’re exploring output devices. So, this week the first I decided to put an RGB LED output devices. To create the schematics, I needed the list of components that I needed for the board. Once I secured the components needed, I could easily choose the correct component from the fab.lib in Eagle to create the schematic. The components I needed were:<br/>
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<strong>1)</strong> <em>Capacitor- 1uF *1</em>
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<strong>2)</strong> - <em>RES1-10k *1</em>
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<strong>3)</strong> - <em>RES2-1k *2</em>
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<strong>4)</strong> - <em>RES4-499 *1</em>
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<strong>5)</strong> - <em>LED RGB Diffused 4PLCC SMD *1</em>
</li>
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<strong>6)</strong> - <em>ATTiny45-SSU *1</em>
</li>
<li>
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<strong>7)</strong> - <em>5V Regulator *1</em>
</li>
<li>
<span class="fa fa-dot-circle-o"></span>
<strong>8)</strong> - <em>PINHD-2X3-SMD *1</em>
</li>
</ul>
I started by entering Eagle and worked through the schematic. It was much faster as I was more comfortable creating labels, wires and using the Fab Library. I quickly populated the board based upon the RGB files on the Fab Academy page. I was confident I had created the and labelled everything correctly. It was time to consult the drawings to make sure it was populated correctly. I felt confident it was correct.<br/>
<p style="text-align:center"><img src="img/week_11/Picture02.jpg" class="img-responsive" alt="..."></p><br/>
<p style="text-align:center"><img src="img/week_11/Picture03.jpg" class="img-responsive" alt="..."></p><br/>
Then I proceeded to convert the schematic to a board file. So, the next phase was to place all the above-mentioned components on the board. I consulted Neil's board to see how he populated his board and tried to line mine up in a similar fashion. I moved over to board view and started dragging the components over and placing them. The RGB Led board is fairly straightforward in its layout. It was a simple task to drag it over.<br/>
<p style="text-align:center"><img src="img/week_11/Picture04.jpg" class="img-responsive" alt="..."></p><br/>
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<h4><strong>PCB Production</strong></h4>
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<p>
This week I did some small mistake, so it took me a lot of times. The first time I laid out the plates and processed them, I found that some parts were not cut in place.</p>
<p style="text-align:center"><img src="img/week_11/Picture05.jpg" class="img-responsive" alt="..."></p><br/>
<p style="text-align:center"><img src="img/week_11/Picture06.jpg" class="img-responsive" alt="..."></p><br/>
After that, line correction was carried out through GIMP, as shown in the following figure.<br/>
<p style="text-align:center"><img src="img/week_11/Picture07.jpg" class="img-responsive" alt="..."></p><br/>
<p style="text-align:center"><img src="img/week_11/Picture08.jpg" class="img-responsive" alt="..."></p><br/>
When welding to the RGB lamp, I found that the order of the RGB pins I purchased was different from that in the fablab module, which was rotated 90 degrees clockwise. RGB LED VCC pin in my board is pin A. But the RGB LED has the wrong aspect ratio<br/>
<p style="text-align:center"><img src="img/week_11/Picture09.jpg" class="img-responsive" alt="..."></p><br/>
<p style="text-align:center"><img src="img/week_11/Picture10.jpg" class="img-responsive" alt="..."></p><br/>
I used GIMP to modify my PCB board. I increased the area of the RGB part.<br/>
<p style="text-align:center"><img src="img/week_11/Picture11.jpg" class="img-responsive" alt="..."></p><br/>
<p style="text-align:center"><img src="img/week_11/Picture12.jpg" class="img-responsive" alt="..."></p><br/>
Then I soldered the necessary components on my board.<br/>
<p style="text-align:center"><img src="img/week_11/Picture13.jpg" class="img-responsive" alt="..."></p><br/>
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<h4><strong>Programming</strong></h4>
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<p>
I used the USBtiny board to program my board and I used the Arudino UNO to provide the power of 5V. I used Neil's c code and made file to program the board and saved them in a specific directory inside the Desktop. I opened Git Bash and went inside the directory where the c code and the make file where located. Then, I ran the following commands:</p>
<code>make -f hello.RGB.45. make program-usbatiny</code><br/>
<p style="text-align:center"><img src="img/week_11/Picture14.jpg" class="img-responsive" alt="..."></p><br/>
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<h4><strong>The RGB show</strong></h4>
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<p style="text-align:center"><img src="img/week_11/Picture13.jpg" class="img-responsive" alt="..."></p>
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<h2><strong>File Download</strong></h2>
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<p> <a href="Files/week_11/Hello.World.RGB.45.zip">Hello.World.RGB.45</a> </p>
<p> <a href="Files/week_11/Stepping_Motor.zip">Stepping_Motor</a> </p>
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Address: No.10, Kehua street, Wuhou District, Chengdu, Sichuan Province, China<br />
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