<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/fFI33f4TejM" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
Ken Burns has published 7 hardware projects on Kickstarter. He explains how it works.
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://tinycircuits.com/">Ken's company TinyCircuits</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Can You Make Money on Kickstarter HW Projects?

<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/2oA4X3OTz0M" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
Interesting experiments and examples to help you to understand ground layout in PCB. Explained by Hans Rosenberg
    </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">00:19</span><span class="chapters-text">Currents flow under track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:10</span><span class="chapters-text">What happen when you are making a board</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:37</span><span class="chapters-text">Where currents flow</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:01</span><span class="chapters-text">Experiment: Cut under track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:51</span><span class="chapters-text">Floating copper fill</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:15</span><span class="chapters-text">Grounded copper fill</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:04</span><span class="chapters-text">Experiment: Filter</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:05</span><span class="chapters-text">2 Layer vs. 4 Layer</span></li>
            <li class="chapters-list-item"><span class="chapters-time">44:00</span><span class="chapters-text">3 rules to prevent ground problems</span></li>
            <li class="chapters-list-item"><span class="chapters-time">46:05</span><span class="chapters-text">Example: Ground plane</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:52</span><span class="chapters-text">Example: 1 VIA per GND pin</span></li>
            <li class="chapters-list-item"><span class="chapters-time">54:46</span><span class="chapters-text">Example: Gap in GND plane</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:02:00</span><span class="chapters-text">Example: FPGA board redesign</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:05:16</span><span class="chapters-text">Star grounding</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:07:39</span><span class="chapters-text">Multiple ground planes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:14:30</span><span class="chapters-text">Example: Digital and Analog on one board</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:16:40</span><span class="chapters-text">About Hans</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.youtube.com/@HansRosenberg74">Hans´ YouTube</a></li>
            <li class="links-list-item"><a href="https://www.hans-rosenberg.com/">Hans´ website</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Examples of BAD Ground in PCB Layout And How to Fix It

<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/X-qubBLJDD8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
What will happen if you don't have enough GND pins on your connector?
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.colorado.edu/faculty/bogatin/">About Eric</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Do You Design Connector Pinout Correctly? | Eric Bogatin

<div class="entry-content">

    <div class="blog-content">
        Here is the PCB stackup what I normally start with + requirements for minimum VIA, track, clearance and impedances.
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text"><b>12 Layers:</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">L1 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L2 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L3 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L4 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L5 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L6 – Powers</span></li>
                    <li class="content-list-item"><span class="content-text">L7 – Powers</span></li>
                    <li class="content-list-item"><span class="content-text">L8 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L9 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L10 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L11 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L12 – Signal</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>Required impedances</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">Single ended: 50 OHMs (all signal layers)</span></li>
                    <li class="content-list-item"><span class="content-text">Differential: 70, 90 and 100 OHMs (all signal layers)</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>Other requirements</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">Minimum through-hole VIA: 0.45mm (pad) / 0.2mm (drill)</span></li>
                    <li class="content-list-item"><span class="content-text">Minimum track / clearance: 0.1 mm / 0.1 mm (more expensive PCB: 0.075mm / 0.075mm)</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>If uVIAs are used</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">uVIA: 0.25mm (pad) / 0.1mm (laser drilled hole)</span></li>
                    <li class="content-list-item"><span class="content-text">buried VIA: 0.45mm (pad) / 0.2mm (drill)</span></li>
                </ul>       
            </span></li>
        </ul>
     </div>

    <div class="blog-content-text">
        I also found useful information about HDI stackups in this Mentor document: <a href="http://www.mentor.com/pcb/resources/overview/hdi-layer-stackups-for-large-dense-pcbs-723df14d-88f7-4e34-b47f-178d8c69ba1b" >HDI Layer Stackups for Large Dense PCBs</a><br><br>

        HDI PCB technology comparison (picture from the Mentor document)
    </div>

    
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/3ef7e-stackup_example.jpg" alt="stackup_example" />
    </div>

    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.mentor.com/pcb/resources/overview/hdi-layer-stackups-for-large-dense-pcbs-723df14d-88f7-4e34-b47f-178d8c69ba1b" >HDI Layer Stackups for Large Dense PCBs</a></li>
        </ul>
    </div>  
</div>

PCB stackup example – minimum track, clearance, VIA …

<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/yjFuTdVEd7Q" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Short tutorial which describes how to start using Cadence Allegro. Explains basic commands and how to:
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text">highlight / de-highlight net</span></li>
            <li class="content-list-item"><span class="content-text">switch between layers</span></li>
            <li class="content-list-item"><span class="content-text">get information about a component</span></li>
            <li class="content-list-item"><span class="content-text">measure</span></li>
            <li class="content-list-item"><span class="content-text">move objects</span></li>
            <li class="content-list-item"><span class="content-text">delete</span></li>
            <li class="content-list-item"><span class="content-text">route</span></li>
            <li class="content-list-item"><span class="content-text">slide tracks …</span></li>
        </ul>
    </div>
</div>


How to start with Cadence Allegro – Very simple tutorial

<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/gL1oSBMsLn8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video shows how to modify polygon pour edges in Altium Designer.
    </div>
</div>


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Examples of BAD Ground in PCB Layout And How to Fix It

Do You Design Connector Pinout Correctly? | Eric Bogatin

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