<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/rMoTqSC9wrY" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
In this tutorial you will design and build your own keyboard. You will also learn all the essentials to design and build any electronics. Enjoy!
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://github.com/FEDEVEL/custom-keyboard">Github (HW + 3D + SW)</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Tutorial - Custom DIY Keyboard Design and Build | Part 2: Keyboard Schematic

<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/N4cLFE0FF2U" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        In this tutorial you will design and build your own keyboard. You will also learn all the essentials to design and build any electronics. Enjoy!
    </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 tutorial about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:34</span><span class="chapters-text">Starting a new project</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:42</span><span class="chapters-text">Adding RP2040</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:43</span><span class="chapters-text">Adding 100nF</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:12</span><span class="chapters-text">Adding 2.2uF</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:14</span><span class="chapters-text">Adding 200R</span></li>
            <li class="chapters-list-item"><span class="chapters-time">25:43</span><span class="chapters-text">Adding 27R</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:40</span><span class="chapters-text">Adding USB-C connector</span></li>
            <li class="chapters-list-item"><span class="chapters-time">31:25</span><span class="chapters-text">Adding ESD protection</span></li>
            <li class="chapters-list-item"><span class="chapters-time">34:03</span><span class="chapters-text">Adding 1uF</span></li>
            <li class="chapters-list-item"><span class="chapters-time">36:10</span><span class="chapters-text">Connecting USB CC pins</span></li>
            <li class="chapters-list-item"><span class="chapters-time">36:46</span><span class="chapters-text">Adding 5.1k</span></li>
            <li class="chapters-list-item"><span class="chapters-time">38:21</span><span class="chapters-text">Voltage regulator 5V to 3V3</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:27</span><span class="chapters-text">Adding 47uF</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:49</span><span class="chapters-text">Crystal ABM8-272-T3</span></li>
            <li class="chapters-list-item"><span class="chapters-time">47:22</span><span class="chapters-text">Adding 1k</span></li>
            <li class="chapters-list-item"><span class="chapters-time">48:32</span><span class="chapters-text">Adding 15pF</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:48</span><span class="chapters-text">Adding 1M</span></li>
            <li class="chapters-list-item"><span class="chapters-time">52:52</span><span class="chapters-text">Flash W25Q128JVS</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:20</span><span class="chapters-text">Boot Select Button</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:01:09</span><span class="chapters-text">Adding 100k</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:03:10</span><span class="chapters-text">Reset Button</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:04:28</span><span class="chapters-text">Adding 10k</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:08:23</span><span class="chapters-text">Adding 1x3 Header</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:11:50</span><span class="chapters-text">User LED</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:15:06</span><span class="chapters-text">Power LED</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:16:38</span><span class="chapters-text">Thank you for watching</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://oshwlab.com/robertferanec/custom-keyboard">Finished project (EasyEDA)</a></li>
            <li class="links-list-item"><a href="https://github.com/FEDEVEL/custom-keyboard">Github (HW + 3D + SW)</a></li>
            <li class="links-list-item"><a href="https://www.thingiverse.com/thing:6784228">Thingiverse (3D)</a></li>
            <li class="links-list-item"><a href="https://www.youtube.com/playlist?list=PLXvLToQzgzdftro2qK5In8p6ExsDFdpzw">Link to the complete playlist</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Tutorial - Custom DIY Keyboard Design and Build: Schematic + PCB + Case | Part 1 - RP2040

<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/Lqc1jmbSxnE" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
Why is the thickness of PCB layers important? Explained.
    </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">00:36</span><span class="chapters-text">What is PCB stackup</span></li>
            <li class="chapters-list-item"><span class="chapters-time">01:08</span><span class="chapters-text">Is stackup important?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">01:37</span><span class="chapters-text">Layer thickness vs. crosstalk</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:37</span><span class="chapters-text">Layer thickness vs. track width</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:11</span><span class="chapters-text">Layer count and order</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:44</span><span class="chapters-text">Conclusion</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>

How to choose PCB?

<div class="entry-content">
    <div class="blog-content">
        I was very happy to write a post for Altium.
    </div>
 
    <div class="blog-content">
        <h2 class="blog-content-heading">Do you plan ahead when working on CPU DDR3 fanout?</h2>
        Choosing the correct VIA for a particular memory group and deciding on how PCB layers will be used can make DDR3 layout a lot easier. Assigning different colors to each memory group help visualize the interface.
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/3ce3c-ddr3-memory-fanout-from-cpu.jpg" alt="ddr3 memory fanout from cpu" />
    </div>

    <div class="blog-content">
        <h2 class="blog-content-heading">Why to use uVIAs instead of through hole VIAs for Address, Command and Control signals?</h2>
        The Address, Command and Control group has the <b>highest number of signals</b> from the memory groups. If we chose through hole VIAs, we would use a lot of space on all the layers. By choosing uVIAs, we only need the space on the Layer 3 and because uVIA is smaller in diameter, we also have more space to fanout the signals on Layer 3.
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/1810b-through-hole-and-uvia-comparison.jpg" alt="Through hole and uVIA comparison" />
    </div>
</div>

How to fanout DDR3 Memory from CPU

<div class="entry-content">
    <div class="blog-content">
        Here are 9 simple steps, which will help you to design first-time-running boards.
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/325e2-isl6236-bar.jpg" alt="isl6236 bar" />
    </div>

    <div class="blog-content">
        <h2 class="blog-content-heading">1) Import/Use/Follow reference schematics & reference boards</h2>
        When you re-use existing and working schematic, your chance that your board will work is quite high.
    </div>    
    <div class="blog-content">
        <h2 class="blog-content-heading">2) Add optional circuits and 0R resistors into your schematic</h2>
        If you are not sure if a part of your circuit will work the way you want, place there optional components (not fitted by default). These 0R resistors or optional circuits will be fitted and will bypass the problematic parts in case of problems.
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">3) Stay compatible with software / firmware</h2>
        You really want to stay compatible with existing software or firmware.
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">4) Think about what will happen and what you are going to do after you power up the board for the very first time</h2>
        You need to be sure your board will power up & reset correctly, and you need to be sure you know how you are going to load the initial software/firmware and debug it.
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">5) Check Symbols and Footprints properly</h2>
        I have seen so many mistakes caused by wrong footprint. Don’t do same mistakes.
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">6) Take time to browse and check your schematic</h2>
        Take enough time to browse your schematic to find and correct connection mistakes. I always find some!
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">7) Once the placement is ready, build a paper model of your PCB</h2>
        Many boards had to be redesigned because something doesn’t fit.
    </div>
    <div class="blog-content">
        <h2 class="blog-content-heading">8) Follow design guides and layout recommendations</h2>
        Good chip manufacturers provides guidelines which help you with layout and to design the board properly. Design guides really help – and you will learn a lot just by reading them.
    </div>
    <div class="blog-content">
        <b><h2 class="blog-content-heading">9) DO NOT DO SILLY MISTAKES!</h2>
        Most of the time when a board has to be redesigned the reason is simple: a silly mistake. I have seen it so many times! Just be careful and check everything.</b><br><br>

        <i>The latest prove that following these points really works is our iMX6 Rex project. Both boards, the iMX6 module and Baseboards are sold as the very first prototype. The boards are quite complex with a lot of components (900+), mechanically advanced (stacked boards, a lot of connectors) and high speed interfaces such DDR3 memories, PCIE, SATA, HDMI. You can check the design and <a href="http://www.imx6rex.com/">download the Schematic and PCB files here</a>.</i>
    </div>

    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.imx6rex.com/">Download the iMX6 Rex Schematic and PCB files</a></li>
        </ul>
    </div>
</div>

9 Steps to Design First Time Running Boards

<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/XbLUOP-q_6Y" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        In case you would like to COPY & PASTE component placement from an existing board to a new Altium project, you can do so very easily. Watch this video.
    </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">00:18</span><span class="chapters-text">Copy Components</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">01:37</span><span class="chapters-text">Why</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">03:25</span><span class="chapters-text">Outro</span>
            </li>
        </ul>
    </div> 
</div>


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Tutorial - Custom DIY Keyboard Design and Build | Part 2: Keyboard Schematic

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How to choose PCB?

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