<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/VBmuJfcMeFk" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video will help you to start simulating your electronic circuits. Explained 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">03:50</span><span class="chapters-text">Circuit simulator vs. Field solver</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:30</span><span class="chapters-text">Which simulator to learn</span></li>
            <li class="chapters-list-item"><span class="chapters-time">11:17</span><span class="chapters-text">Downloading Qucs</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:30</span><span class="chapters-text">Starting a new simulation</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:43</span><span class="chapters-text">Time domain simulation</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:19</span><span class="chapters-text">Simulating impedance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:30</span><span class="chapters-text">Using parameters</span></li>
            <li class="chapters-list-item"><span class="chapters-time">32:00</span><span class="chapters-text">AC simulation</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:37</span><span class="chapters-text">Explaining the results of simulations</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:40</span><span class="chapters-text">Simulating PCB tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">43:18</span><span class="chapters-text">Simulating transmission line</span></li>
            <li class="chapters-list-item"><span class="chapters-time">55:48</span><span class="chapters-text">DesignCon</span></li>
    </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>

How to Start with Electronic Circuit Simulation for Free | 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/vnSX34YLjCo" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
About power supplies on motherboards and all related control and logic subsystems. Explained by Istvan Nagy
    </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">01:14</span><span class="chapters-text">Types of power supplies</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:32</span><span class="chapters-text">Testing power supplies</span></li>
            <li class="chapters-list-item"><span class="chapters-time">11:36</span><span class="chapters-text">About power supply layout and voltage sense</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:23</span><span class="chapters-text">Output voltage</span></li>
            <li class="chapters-list-item"><span class="chapters-time">19:57</span><span class="chapters-text">Voltage regulator features</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:56</span><span class="chapters-text">CPLD</span></li>
            <li class="chapters-list-item"><span class="chapters-time">39:59</span><span class="chapters-text">Motherboard power subsystem example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">43:06</span><span class="chapters-text">Power sequencing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">54:30</span><span class="chapters-text">System management</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:03</span><span class="chapters-text">Sequencer chip</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:00:44</span><span class="chapters-text">FPGA</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:02:40</span><span class="chapters-text">Initialization sequence</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:08:01</span><span class="chapters-text">CPLD schematic page example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:10:24</span><span class="chapters-text">Power domains</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:18:44</span><span class="chapters-text">x86 Power stages</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:24:39</span><span class="chapters-text">Thermal protection and management</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:29:46</span><span class="chapters-text">Istvan's book</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.amazon.com/Complex-Digital-Hardware-Design-Istvan/dp/1032702087">Istvan´s Book</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

How Computer Motherboard Power Supplies Work

<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-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">03:15</span><span class="chapters-text">Starting with Kickstarter</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:00</span><span class="chapters-text">Kickstarter vs. Indiegogo</span></li>
            <li class="chapters-list-item"><span class="chapters-time">13:49</span><span class="chapters-text">Calculating price for HW products</span></li>
            <li class="chapters-list-item"><span class="chapters-time">18:36</span><span class="chapters-text">Starting Kickstarter vs. Project status</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:11</span><span class="chapters-text">Preparing marketing materials</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:42</span><span class="chapters-text">Getting help with promotion</span></li>
            <li class="chapters-list-item"><span class="chapters-time">33:21</span><span class="chapters-text">Shipping thousands of products</span></li>
            <li class="chapters-list-item"><span class="chapters-time">37:34</span><span class="chapters-text">Goal amount</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:46</span><span class="chapters-text">Find people</span></li>
            <li class="chapters-list-item"><span class="chapters-time">46:02</span><span class="chapters-text">Board vs. Product</span></li>
            <li class="chapters-list-item"><span class="chapters-time">50:07</span><span class="chapters-text">Cost</span></li>
            <li class="chapters-list-item"><span class="chapters-time">54:51</span><span class="chapters-text">Do it because you enjoy it</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:20</span><span class="chapters-text">About Ken's company</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:06:57</span><span class="chapters-text">How to reach out to media</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:12:04</span><span class="chapters-text">Component sourcing </span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:15:45</span><span class="chapters-text">"Just" a board example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:18:02</span><span class="chapters-text">Product example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:23:14</span><span class="chapters-text">Community</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:27:28</span><span class="chapters-text">Advice</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:29:21</span><span class="chapters-text">... only lost 60k, but ...</span></li>
    </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="blog-content">
        DDR3 mirroring is a feature of memory controller.<br><br>

        See the following text from <a href="http://www.jedec.org/sites/default/files/docs/4_20_19R20.pdf">DDR3 SDRAM Unbuffered DIMM Design Specification</a> (JEDEC website – Registration is required, page 17).<br><br>

        <i>Following pins are being mirrored: A3<->A4, A5<->A6, A7<->A8, BA0<->BA1.<br><br>

        “Since the cross-wired pins have no secondary functions, there is no problem in normal operation. Any data written is read the same way. There are limitations however. When writing to the internal registers with a “load mode” operation, the specific address is required. This requires the controller to know if the rank is mirrored or not. This requires a few rules. Mirroring is done on 2 rank modules and can only be done on the second rank. There is not a requirement that the second rank be mirrored. There is a bit assignment in the SPD that indicates whether the module has been designed with the mirrored feature or not. See the DDR3 UDIMM SPD specification for these details. The controller must read the SPD and have the capability of de-mirroring the address when accessing the second rank.”</i>
    </div>

    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/8ea2f-ddr3_mirroring_pcb_layout.jpg" alt="DDR3_mirroring_PCB_layout" />
    </div>

    <div class="blog-content-text">
        To confirm this, have a look on the following pictures from <a href="http://www.jedec.org/sites/default/files/docs/design/DDR3/PC3_12800_UDIMM_V07_RC_B0_20070529.zip">PC3-12800 UDIMM</a> layout where I have selected A8 signal:
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/b9f76-ddr3_mirroring_top_and_bottom_layout.jpg" alt="DDR3_mirroring_top_and_bottom_layout" />
    </div>
    
    <div class="blog-content-text">
        <i>Details of A8 Top and Bottom Layer:</i>
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/b37e2-ddr3_mirroring_top_layout1.jpg" alt="DDR3_mirroring_top_layout" />
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/47294-ddr3_mirroring_bottom_layout.jpg" alt="DDR3_mirroring_bottom_layout" />
    </div>
    
    <div class="blog-content-text">
        <i>Screenshot from schematic for D1 and D9:</i>
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/9bb0b-ddr3_mirroring_schematic.jpg" alt="DDR3_mirroring_schematic" />
    </div>


    <div class="blog-content-text">
        Components D1 and D9 are listed in the BOM with same part number.
    </div>

   
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.jedec.org/sites/default/files/docs/4_20_19R20.pdf">DDR3 SDRAM Unbuffered DIMM Design Specification</a></li>
            <li class="links-list-item"><a href="http://www.jedec.org/sites/default/files/docs/design/DDR3/PC3_12800_UDIMM_V07_RC_B0_20070529.zip">PC3-12800 UDIMM</a></li>
        </ul>
    </div>  
</div>

DDR3 memory mirroring – PCB layout

<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/SxeW_-UcZqk" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video explains how to generate a STEP file (3D output) from Altium Designer. It also explains how to add mounting holes into the 3D model.
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.cadexchanger.com/">3D CAD software from this video (CAD Exchanger)</a></li>
        </ul>
    </div>  
</div>


Altium Designer – Generating 3D CAD File

<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/QlNgoS3SEME" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video explains how to do differential pair routing and how to setup rules for different impedances in Altium Designer PCB layout.
    </div>
</div>


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