<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/nMwamrZE_rc" 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">00:39</span><span class="chapters-text">Mounting holes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:12</span><span class="chapters-text">USB-C connector</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:50</span><span class="chapters-text">Drawing board shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:27</span><span class="chapters-text">Rotary encoders</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:11</span><span class="chapters-text">Buttons</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:22</span><span class="chapters-text">Sockets</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:40</span><span class="chapters-text">LEDs under buttons</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:44</span><span class="chapters-text">Metal plate holders</span></li>
            <li class="chapters-list-item"><span class="chapters-time">13:49</span><span class="chapters-text">RP2040</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:48</span><span class="chapters-text">USER and Power LEDs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:44</span><span class="chapters-text">Debug header</span></li>
            <li class="chapters-list-item"><span class="chapters-time">18:01</span><span class="chapters-text">Set Net and Layer colors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:29</span><span class="chapters-text">Decoupling capacitors around MCU</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:15</span><span class="chapters-text">USB resistors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">25:00</span><span class="chapters-text">Crystal circuit</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:00</span><span class="chapters-text">Series termination resistors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">28:30</span><span class="chapters-text">Filters</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:40</span><span class="chapters-text">Flash</span></li>
            <li class="chapters-list-item"><span class="chapters-time">31:27</span><span class="chapters-text">Reset button + schematic update</span></li>
            <li class="chapters-list-item"><span class="chapters-time">34:06</span><span class="chapters-text">Boot button and circuit update</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:53</span><span class="chapters-text">Components around USB-C connector</span></li>
            <li class="chapters-list-item"><span class="chapters-time">38:09</span><span class="chapters-text">Power for LEDs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">38:46</span><span class="chapters-text">Voltage regulator</span></li>
            <li class="chapters-list-item"><span class="chapters-time">39:52</span><span class="chapters-text">LED resistors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:08</span><span class="chapters-text">Level translator</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:59</span><span class="chapters-text">Diodes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">44:37</span><span class="chapters-text">Components around encoders</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:26</span><span class="chapters-text">Decoupling capacitors for LEDs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">51:46</span><span class="chapters-text">Double check position of components</span></li>
            <li class="chapters-list-item"><span class="chapters-time">53:27</span><span class="chapters-text">Placement finished</span></li>
            <li class="chapters-list-item"><span class="chapters-time">54:14</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 | Part 3: PCB - Component Placement

<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-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">00:16</span><span class="chapters-text">Adding socket for switch</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:23</span><span class="chapters-text">Adding switch</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:21</span><span class="chapters-text">Adding diode</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:48</span><span class="chapters-text">Connecting keyboard matrix</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:05</span><span class="chapters-text">Adding rotary encoder</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:21</span><span class="chapters-text">Connecting encoder</span></li>
            <li class="chapters-list-item"><span class="chapters-time">44:26</span><span class="chapters-text">Adding 10nF capacitor</span></li>
            <li class="chapters-list-item"><span class="chapters-time">56:39</span><span class="chapters-text">Adding and connecting LEDs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:03:46</span><span class="chapters-text">Adding buffer</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:08:03</span><span class="chapters-text">Connecting LED power and adding 0.1R</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:10:28</span><span class="chapters-text">Adding RGB LED</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:18:53</span><span class="chapters-text">Adding mounting holes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:24:37</span><span class="chapters-text">Adding stand off</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:36:54</span><span class="chapters-text">Annotate schematic</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:41:03</span><span class="chapters-text">Importing schematic to PCB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:42:21</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://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/4OBO760u7jg" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Do we have to route tracks with 50 OHM impedance? Can we use a different impedance? Why is it 50 OHMs?
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://youtu.be/U60y4JC0Wxs">Full interview with Eric</a></li>
            <li class="links-list-item"><a href="https://www.linkedin.com/in/eric-bogatin-368860/">Eric Bogatin</a></li>
            <li class="links-list-item"><a href="https://www.bethesignal.com/bogatin/3monthsubscription.php">Signal Integrity Academy (use FEDSI - 3 months free)</a></li>
        </ul>
    </div>   
</div>


Why is 50 OHM impedance used in PCB Layout? | Explained | Eric Bogatin

<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/U60y4JC0Wxs" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Everything you need to know to understand impedance in PCB layout (and TDR). Clear and easy to understand explanation by Eric Bogatin
    </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">00:49</span><span class="chapters-text">What TDR is and what it does?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:37</span><span class="chapters-text">What is characteristic impedance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">04:48</span><span class="chapters-text">Why reflections are bad</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:54</span><span class="chapters-text">Why do we use 50 ohm in pcb tracks?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:28</span><span class="chapters-text">Are lower impedance tracks more immune to noise?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:45</span><span class="chapters-text">Can you use any impedance for differential pairs?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:10</span><span class="chapters-text">What is difference between closely and loosely coupled diff impedance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">36:03</span><span class="chapters-text">Experimenting with TDR simulation</span></li>
            <li class="chapters-list-item"><span class="chapters-time">48:58</span><span class="chapters-text">Measuring and explaining TDR on a simple pcb track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">56:39</span><span class="chapters-text">Can we do TDR on a real board?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:02:13</span><span class="chapters-text">Measuring and explaining TDR on a pcb track with different width</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:05:53</span><span class="chapters-text">Answer: Why we sometimes remove ground under pads</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:07:49</span><span class="chapters-text">Measuring a coaxial cable with TDR</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:14:51</span><span class="chapters-text">Why you may need TDR are where it is used</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:19:00</span><span class="chapters-text">Do we really need to care about small changes in impedance? When?</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.linkedin.com/in/eric-bogatin-368860/">Eric Bogatin LinkedIn</a></li>
            <li class="links-list-item"><a href="https://www.bethesignal.com/bogatin/3monthsubscription.php">Signal Integrity Academy (use FEDSI - 3 months free)</a></li>
            <li class="links-list-item"><a href="https://youtu.be/ERvQeln9l-g">The video with Bert</a></li>
            <li class="links-list-item"><a href="https://youtube.com/playlist?list=PLXvLToQzgzdeRWySVRb3yeEbwVsNGU4jY">Robert´s server videos</a></li>
        </ul>
    </div>   
</div>


Every PCB Designer Needs To Know This About PCB Track Impedance | TDR | Eric Bogatin

<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/7uupuor2Dc8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        New hardware and PCB design course on mixed-signal embedded systems just released!
    </div>
  
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">

            <li class="links-list-item"><a href="https://fedevel.com/courses/mixed-signal-hardware-design-with-kicad">Mixed-signal Hardware Design course</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL courses</a></li>
        </ul>
    </div>  
</div>

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Tutorial - Custom DIY Keyboard Design and Build | Part 3: PCB - Component Placement

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

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

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