<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="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/cOtv0ddR3aI" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Calculating and designing a simple PCB antenna. Can you guess how big is it?
    </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 this video is about</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">00:09</span><span class="chapters-text">What microstrip pcb patch antenna is</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">04:38</span><span class="chapters-text">Er and calculating Eeff (effective permittivity)</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">07:24</span><span class="chapters-text">Calculating length of pcb patch antenna</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">10:04</span><span class="chapters-text">Online Calculator to get size of patch antenna</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">11:20</span><span class="chapters-text">Calculating width</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">16:37</span><span class="chapters-text">The feed of a PCB antenna</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">19:31</span><span class="chapters-text">Calculating quarter-wave transformer</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">25:18</span><span class="chapters-text">Ground plane under pcb antenna</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">27:39</span><span class="chapters-text">Finished PCB antenna</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">30:06</span><span class="chapters-text">PCB antenna used on a board</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">37:17</span><span class="chapters-text">Schematic</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">43:06</span><span class="chapters-text">PCB Antenna Footprint</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.youtube.com/c/PhilS94">Phil's Youtube Channel</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses/mixed-signal-hardware-design-with-kicad">Phil's Online Hardware Design Course</a></li>
        </ul>
    </div>   
</div>


Designing a PCB patch antenna for WiFi and Bluetooth | KiCad | Philip Salmony

<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/Jexhr5NIHog" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Operational amplifier (op amp) theory and design of a very simple op amp using discrete components (transistors, resistors, capacitors). Including content on op amp stages (difference amplifier, gain stage, output stage), bandwidth, gain-bandwidth-product (GBP), op amp performance criteria, negative feedback, and more. Final demonstrations of real-world implementation on a PCB using the Digilent Analog Discovery Pro.
    </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">00:17</span><span class="chapters-text">Content</span></li>
            <li class="chapters-list-item"><span class="chapters-time">01:39</span><span class="chapters-text">Op-Amp Basics</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:57</span><span class="chapters-text">Open Loop View</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:37</span><span class="chapters-text">Closed Loop View</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:00</span><span class="chapters-text">Why is Negative Feedback Useful?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:33</span><span class="chapters-text">Negatives of Using Feedback</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:07</span><span class="chapters-text">Implementation of Negative Feedback</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:58</span><span class="chapters-text">Op Amp Sections</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:10</span><span class="chapters-text">Design Goals</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:58</span><span class="chapters-text">Difference Amplifier</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:29</span><span class="chapters-text">Gain Stage</span></li>
            <li class="chapters-list-item"><span class="chapters-time">16:53</span><span class="chapters-text">Simulation and Gain-Bandwidth-Product (GBP)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">18:28</span><span class="chapters-text">Test Circuit</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:48</span><span class="chapters-text">PCB and Schematic Overview (KiCad)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">22:06</span><span class="chapters-text">WaveForms Overview</span></li>
            <li class="chapters-list-item"><span class="chapters-time">22:49</span><span class="chapters-text">Test - Gain and Bias</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:18</span><span class="chapters-text">Test - Gain-Bandwidth-Product</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:04</span><span class="chapters-text">Test - Low- and High-Pass Filter</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:23</span><span class="chapters-text">Test - Dominant Pole Compensation</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://digilent.com/shop/analog-discovery-pro-3000-series-portable-high-resolution-mixed-signal-oscilloscopes/">Digilent ADP3450</a></li>

            <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>

Op Amp Theory and Design - Phil's Lab #53

<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/MBFNGZpwWZs" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Very simple way to create a new schematic symbol by using Manufacturer Part Search.
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://youtu.be/PqFtSpAXB9Q">Watch the full tutorial here</a></li>
        </ul>
    </div>   
</div>


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