<div class="entry-content"><div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/YzBtfN1LQtM" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span></div><div class="blog-content"> I challenged a software engineer to design his very first PCB. What happened?</div><div class="blog-content-chapters"><div>Chapters:</div><ul class="chapters-list"><li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">The challenge</span></li><li class="chapters-list-item"><span class="chapters-time">01:01</span><span class="chapters-text">Schematic page</span></li><li class="chapters-list-item"><span class="chapters-time">03:46</span><span class="chapters-text">STM32</span></li><li class="chapters-list-item"><span class="chapters-time">10:18</span><span class="chapters-text">Power</span></li><li class="chapters-list-item"><span class="chapters-time">21:50</span><span class="chapters-text">Power LED</span></li><li class="chapters-list-item"><span class="chapters-time">23:29</span><span class="chapters-text">Boot and Reset</span></li><li class="chapters-list-item"><span class="chapters-time">27:47</span><span class="chapters-text">Crystal</span></li><li class="chapters-list-item"><span class="chapters-time">30:58</span><span class="chapters-text">USB</span></li><li class="chapters-list-item"><span class="chapters-time">33:59</span><span class="chapters-text">Arduino headers and User LED</span></li><li class="chapters-list-item"><span class="chapters-time">36:49</span><span class="chapters-text">SWI and UART connectors</span></li></div><div class="blog-content-links"><div>Links:</div><ul class="links-list"><li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li></ul></div></div>

Is this really how beginners design boards??? | Schematic Review

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/sKOUOU-hVEs" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
This video will help you to understand eye diagrams. Thank you very much Tim Wang Lee
    </div>

    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What is this video about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:17</span><span class="chapters-text">How eye diagram is created and why it´s useful</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:35</span><span class="chapters-text">How reflections influence eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:17</span><span class="chapters-text">Simulating reflections and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:19</span><span class="chapters-text">How crosstalk influences eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:36</span><span class="chapters-text">Simulating crosstalk and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:09</span><span class="chapters-text">How loss influences eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:13</span><span class="chapters-text">Simulating loss and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">50:32</span><span class="chapters-text">Equalization explained</span></li>
            <li class="chapters-list-item"><span class="chapters-time">57:53</span><span class="chapters-text">CTLE Equalization</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:49</span><span class="chapters-text">FFE Equalization</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:02:19</span><span class="chapters-text">DFE Equalization</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.keysight.com/find/ads-si-workshop">Learn more about Signal Integrity with ADS</a></li>
            <li class="links-list-item"><a href="https://www.keysight.com/us/en/products/software/pathwave-design-software.html">Get a head start with Electronic Design Automation</a></li>
            <li class="links-list-item"><a href="https://www.linkedin.com/in/timwanglee/">Connect with Tim</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

What does an eye diagram show? Here is how you recognize problems - reflections, crosstalk and loss

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/Rr9NBtrA4t4" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Watch how differential pair signals are travelling through a PCB. Thank you very much Yuriy Shlepnev 
    </div>

    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What is this video about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:33</span><span class="chapters-text">Differential pairs routed on top / bottom, THIN PCB, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:56</span><span class="chapters-text">3W, Top / Bottom</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:17</span><span class="chapters-text">THICK PCB, Top / Bottom</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:49</span><span class="chapters-text">No GND plane</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:01</span><span class="chapters-text">Differential pairs inside of PCB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:30</span><span class="chapters-text">3D animation, top/bottom, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">48:51</span><span class="chapters-text">3D animation, top/bottom, 3W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">57:12</span><span class="chapters-text">3D animation, inside of PCB, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:40</span><span class="chapters-text">3D animation, inside of PCB, 3W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:06:21</span><span class="chapters-text">Crosstalk examples</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.linkedin.com/in/yuriy-shlepnev-7b39136/">Yuriy's LinkedIn</a></li>
            <li class="links-list-item"><a href="https://www.simberian.com/">Yuriy's company</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Watch Differential Pair Fields and Currents in PCB

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/qMUzLU636s8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Guide on how to connect, check, program, and debug your custom STM32-based hardware via SWD and the ST-Link debugger utilizing STM32CubeIDE.
    </div>
    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">Introduction</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:28</span><span class="chapters-text">ST-Link</span></li>
            <li class="chapters-list-item"><span class="chapters-time">01:08</span><span class="chapters-text">Hardware Connections</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:11</span><span class="chapters-text">ST-Link Utility (Checking that we can connect to STM32 MCU)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:37</span><span class="chapters-text">STM32CubeIDE (Programming and debugging software package)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:22</span><span class="chapters-text">Enabling SWD</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:04</span><span class="chapters-text">Setting up an external high-speed crystal (HSE)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:10</span><span class="chapters-text">Additional peripheral selection</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:50</span><span class="chapters-text">LED blinking test code</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:44</span><span class="chapters-text">Building code and checking for compiler errors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:02</span><span class="chapters-text">Debug configuration, debugging, and flashing via ST-Link</span></li>
            <li class="chapters-list-item"><span class="chapters-time">11:26</span><span class="chapters-text">Running, pausing, and setting breakpoints</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:20</span><span class="chapters-text">Hardware running code</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.st.com/en/development-tools/st-link-v2.html">ST-Link/V2 Debugger</a></li>
            <li class="links-list-item"><a href="https://www.olimex.com/Products/ARM/JTAG/ARM-JTAG-20-10/">20-pin to 10-pin 1.27mm Adapter</a></li>
            <li class="links-list-item"><a href="https://www.st.com/en/development-tools/stm32cubeide.html">STM32CubeIDE</a></li>
            <li class="links-list-item"><a href="https://www.st.com/en/development-tools/stsw-link004.html">ST-Link Utility</a></li>

            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL courses</a></li>
        </ul>
    </div>  
</div>

STM32 + SWD + ST-Link + CubeIDE | Debugging on Custom Hardware Tutorial - Phil's Lab #4

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/14_jh3nLSsU" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Overview of STM32, RF, and USB hardware design, schematic creation, and PCB layout and routing in KiCad using a real-world example project.<br><br>

Various tips on controlled impedance routing, differential pairs, USB, and RF layout.

Correction in schematic: NRF24 IREF pin needs to be pulled low to GND via a 10k resistor (not to 3V3 as shown in the video!). Fix has been pushed to GitHub.
    </div>
    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">System overview, component selection</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:15</span><span class="chapters-text">STM32 pin-out and peripheral selection</span></li>
            <li class="chapters-list-item"><span class="chapters-time">04:10</span><span class="chapters-text">Schematic sectioning</span></li>
            <li class="chapters-list-item"><span class="chapters-time">04:48</span><span class="chapters-text">Power supply (power via USB, filtering, USB decoupling caps)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:45</span><span class="chapters-text">STM32 microcontroller (USB connections and terminations, SPI, LEDs, decoupling)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:55</span><span class="chapters-text">SWD (Serial Wire Debug) connector</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:45</span><span class="chapters-text">USB connector and ESD protection</span></li>
            <li class="chapters-list-item"><span class="chapters-time">13:11</span><span class="chapters-text">NRF24 RF transceiver</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:40</span><span class="chapters-text">Extern crystal (load capacitor calculation)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:57</span><span class="chapters-text">RF antenna matching circuit</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:31</span><span class="chapters-text">Component selection and sizing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:24</span><span class="chapters-text">Rough layout and sectioning (USB, power, microcontroller, and RF)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:37</span><span class="chapters-text">Component placement order (most 'critical' components first)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">21:30</span><span class="chapters-text">USB ESD protection placement</span></li>
            <li class="chapters-list-item"><span class="chapters-time">21:42</span><span class="chapters-text">RF layout</span></li>
            <li class="chapters-list-item"><span class="chapters-time">22:16</span><span class="chapters-text">Determining board outline (size and rounded edges)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">22:42</span><span class="chapters-text">Fine-tuning the layout</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:24</span><span class="chapters-text">Layer stack-up (4 layer board)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:16</span><span class="chapters-text">Sectioning (USB, power, microcontroller, and RF), track widths, and clearance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">25:17</span><span class="chapters-text">Power and ground via connections to copper pours</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:00</span><span class="chapters-text">Ground and power planes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:43</span><span class="chapters-text">Power supply routing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:26</span><span class="chapters-text">STM32 routing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">28:15</span><span class="chapters-text">Crystal routing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:40</span><span class="chapters-text">RF and USB routing (trace impedance, differential routing, ground pours)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">36:53</span><span class="chapters-text">RF guard ring</span></li>
            <li class="chapters-list-item"><span class="chapters-time">38:45</span><span class="chapters-text">Clearance between traces</span></li>
            <li class="chapters-list-item"><span class="chapters-time">39:25</span><span class="chapters-text">Via-in-pad</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:05</span><span class="chapters-text">Labelling and logo</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:40</span><span class="chapters-text">Marking 'pin 1' locations</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:53</span><span class="chapters-text">Marking diode polarity</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:42</span><span class="chapters-text">Checking your work</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:00</span><span class="chapters-text">Gerber and drill file export</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:25</span><span class="chapters-text">Footprint positions file (for assembly)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:49</span><span class="chapters-text">Bill of materials (BOM)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">43:10</span><span class="chapters-text">Gerber file check (via GerbView)</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://github.com/pms67/STRF-Kicad">Github - Design files</a></li>

            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL courses</a></li>
        </ul>
    </div>  
</div>

KiCad STM32 + RF + USB Hardware Design - Phil's Lab #5

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/HG-5Wr7zSX8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video explains what you may want to be careful about when you are comparing footprint with a real component.
    </div>
</div>


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Is this really how beginners design boards??? | Schematic Review

What does an eye diagram show? Here is how you recognize problems - reflections, crosstalk and loss

Watch Differential Pair Fields and Currents in PCB

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