<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/bpns0GSR_zI" 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">00:52</span><span class="chapters-text">Generating and checking gerber files</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:16</span><span class="chapters-text">Generating BOM (Bill of Material)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:58</span><span class="chapters-text">Generating Pick and Place file</span></li>
            <li class="chapters-list-item"><span class="chapters-time">11:51</span><span class="chapters-text">Ordering PCB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:12</span><span class="chapters-text">Ordering PCB Assembly</span></li>
            <li class="chapters-list-item"><span class="chapters-time">18:13</span><span class="chapters-text">Ordering 3D printing - EasyEDA box</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:05</span><span class="chapters-text">Downloading a different variant of box</span></li>
            <li class="chapters-list-item"><span class="chapters-time">22:20</span><span class="chapters-text">Ordering 3D printing - Knobs and Plate</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:12</span><span class="chapters-text">Ordering CNC - Plate</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:38</span><span class="chapters-text">Ordering 3D printing - Frame and Rings</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:54</span><span class="chapters-text">Ordering 3D printing - Top and bottom (1 color)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">31:36</span><span class="chapters-text">Ordering multicolor 3D printing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">34:01</span><span class="chapters-text">Paying for PCB and Assembly</span></li>
            <li class="chapters-list-item"><span class="chapters-time">34:40</span><span class="chapters-text">Submitting order for 3D printing and CNC</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:46</span><span class="chapters-text">After ordering: Check placement, Confirm 3D printing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">39:03</span><span class="chapters-text">Ordering the missing components</span></li>
            <li class="chapters-list-item"><span class="chapters-time">47:05</span><span class="chapters-text">How to build the keyboard together</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:50</span><span class="chapters-text">Pay for 3D printing and CNC</span></li>
            <li class="chapters-list-item"><span class="chapters-time">50:37</span><span class="chapters-text">Save the current version of project</span></li>
            <li class="chapters-list-item"><span class="chapters-time">51:08</span><span class="chapters-text">Where to download everything</span></li>
            <li class="chapters-list-item"><span class="chapters-time">53:08</span><span class="chapters-text">Uploading firmware and configuring keyboard</span></li>
            <li class="chapters-list-item"><span class="chapters-time">54:27</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 7: Manufacturing

<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/4v2gWze6xi4" 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">00:17</span><span class="chapters-text">Creating the box</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:38</span><span class="chapters-text">Opening for keys</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:55</span><span class="chapters-text">Openings around encoder</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:33</span><span class="chapters-text">Openings for LEDs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:30</span><span class="chapters-text">Opening for USB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:10</span><span class="chapters-text">Adding pillars for screws - TOP</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:01</span><span class="chapters-text">Adding pillars for screws - BOTTOM</span></li>
            <li class="chapters-list-item"><span class="chapters-time">18:38</span><span class="chapters-text">Adding support to prevent PCB bending</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:03</span><span class="chapters-text">Exporting and 3D printing the case</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:39</span><span class="chapters-text">Adding a hole for button</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:53</span><span class="chapters-text">Adjusting screw pillars</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:06</span><span class="chapters-text">Generate 3D stl files</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:22</span><span class="chapters-text">Printing PCB on paper</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:40</span><span class="chapters-text">Adding License to schematic</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:17</span><span class="chapters-text">Adding links and list of items to build the keyboard</span></li>
            <li class="chapters-list-item"><span class="chapters-time">31:48</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 6: Case / Box design

<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/d8C-tk0B4Qg" 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">00:19</span><span class="chapters-text">Improving +5V_USB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:36</span><span class="chapters-text">GND around voltage regulator</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:24</span><span class="chapters-text">+3V3 around voltage regulator</span></li>
            <li class="chapters-list-item"><span class="chapters-time">11:47</span><span class="chapters-text">Improving +1V1</span></li>
            <li class="chapters-list-item"><span class="chapters-time">13:18</span><span class="chapters-text">+3V3 around MCU</span></li>
            <li class="chapters-list-item"><span class="chapters-time">16:20</span><span class="chapters-text">Finishing track improvements</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:15</span><span class="chapters-text">Placing stitching VIAs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:18</span><span class="chapters-text">Checking important tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:55</span><span class="chapters-text">Checking thermal relief </span></li>
            <li class="chapters-list-item"><span class="chapters-time">31:05</span><span class="chapters-text">Enabling designators</span></li>
            <li class="chapters-list-item"><span class="chapters-time">33:06</span><span class="chapters-text">Adding text</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:41</span><span class="chapters-text">Adding logo</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:14</span><span class="chapters-text">Fix rest of the errors</span></li>
            <li class="chapters-list-item"><span class="chapters-time">43:22</span><span class="chapters-text">Adding license</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:45</span><span class="chapters-text">Changing tracks to 50 Ohms</span></li>
            <li class="chapters-list-item"><span class="chapters-time">47:47</span><span class="chapters-text">Checking all nets</span></li>
            <li class="chapters-list-item"><span class="chapters-time">52:43</span><span class="chapters-text">Board is finished</span></li>
            <li class="chapters-list-item"><span class="chapters-time">53:15</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 5: PCB Layout Improvement

<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/Hfzq1QES-Q" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Some tips for when designing hardware and PCBs with simple RF sections and components. These concepts have aided me well when designing 4-layer embedded systems PCBs.<br><br>Topics: critical trace lengths, stackups, controlled impedance traces (microstrip, stripline), impedance discontinuities due to wide pads, clearances, bias tees.
    </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">00:53</span><span class="chapters-text">Overview</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:08</span><span class="chapters-text">Critical length</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:45</span><span class="chapters-text">Stackup</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:51</span><span class="chapters-text">Controlled impedance traces</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:34</span><span class="chapters-text">Impedance discontinuities (pad-to-trace)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:34</span><span class="chapters-text">Clearance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:17</span><span class="chapters-text">Antenna bias tees</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://open-seneca.org">Open Seneca</a></li>

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

Practical RF Hardware and PCB Design Tips - Phil's Lab #19

<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/5EeQPxRdurk" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        The best crosstalk explanation I have ever seen. What do you think? Thank you 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">Intro</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">06:56</span><span class="chapters-text">Microstrip</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">08:49</span><span class="chapters-text">Adding another signal line</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">16:13</span><span class="chapters-text">Im wrong</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">21:55</span><span class="chapters-text">Near and far end crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">26:38</span><span class="chapters-text">Higher voltage currents</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">28:40</span><span class="chapters-text">Increasing current impedance</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">33:18</span><span class="chapters-text">Comparing reflections</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">35:30</span><span class="chapters-text">Frequency of ringing</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">37:18</span><span class="chapters-text">Microstrip crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">38:31</span><span class="chapters-text">Derivative crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">39:26</span><span class="chapters-text">What is impedance value of the driver</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">42:17</span><span class="chapters-text">Moving the traces farther apart</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">43:35</span><span class="chapters-text">Near and crosstalk coefficient</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">44:40</span><span class="chapters-text">Simulator</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">45:09</span><span class="chapters-text">Field solver</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">45:24</span><span class="chapters-text">Measuring crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">48:38</span><span class="chapters-text">Teledyne</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:00</span><span class="chapters-text">The Scale</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:33</span><span class="chapters-text">Rise Time</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:49</span><span class="chapters-text">Measuring the Scope</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">55:13</span><span class="chapters-text">Why is it a little longer</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">56:08</span><span class="chapters-text">Nearend crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">56:38</span><span class="chapters-text">Termination</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">58:53</span><span class="chapters-text">Expanding the timebase</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</a></li>
            <li class="links-list-item"><a href="https://www.bethesignal.com/bogatin/">Eric's courses</a></li>
        </ul>
    </div>   
</div>


Understanding Crosstalk in PCB Layout – You may wish you knew this before (with 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/aySAg50S1E8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Do you know what a nibble in DDR memory design is?
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.fedevel.com/welldoneblog/wp-content/uploads/2014/06/IMX6DQ6SDLHDG.pdf">iMX6 DDR3 Design Guide</a></li>
            <li class="links-list-item"><a href="https://www.nxp.com/files-static/32bit/doc/app_note/AN5097.pdf?&fasp=1&WT_TYPE=Application+Notes&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf">DDR4 Layout Design PDF</a></li>
            <li class="links-list-item"><a href="https://semiconductor.samsung.com/resources/device-operation-timing-diagram/DDR4_Device_Operations_Rev11_Oct_14-0.pdf">DDR Commands PDF</a></li>
            <li class="links-list-item"><a href="https://welldoneblog.fedevel.com/2011/06/15/ddr3-memory-chip-mirroring-pcb-layout/">DDR Mirroring</a></li>
            <li class="links-list-item"><a href="https://www.compuram.biz/documents/datasheet/519203ds_ddr2_1gb_f-die_based_rdimm_rev10.pdf">Memory Module PDF</a></li>
        </ul>
    </div>   
</div>


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Tutorial - Custom DIY Keyboard Design and Build | Part 7: Manufacturing

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Tutorial - Custom DIY Keyboard Design and Build | Part 5: PCB Layout Improvement

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