<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/r_zaDXqUSn8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
For everyone who would like to learn how to start with RP2040 / RP2350 programming. Thank you very much Scott Shawcroft
    </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">01:52</span><span class="chapters-text">Flashing CircuitPython on Raspberry PI PICO</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:48</span><span class="chapters-text">How to run your code</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:29</span><span class="chapters-text">Blinky example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">16:28</span><span class="chapters-text">Addressable RGB LED example - NeoPixel</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:13</span><span class="chapters-text">Input example - Push button</span></li>
            <li class="chapters-list-item"><span class="chapters-time">37:10</span><span class="chapters-text">About serial port</span></li>
            <li class="chapters-list-item"><span class="chapters-time">42:12</span><span class="chapters-text">Making an USB keyboard - example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">53:19</span><span class="chapters-text">I2C example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:06:59</span><span class="chapters-text">WiFi Example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:15:45</span><span class="chapters-text">Webserver and controlling LED over WiFi example</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:22:04</span><span class="chapters-text">About Scott</span></li>
    </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/tannewt/">Scott´s LinkedIn</a></li>
            <li class="links-list-item"><a href="https://adafruit-playground.com/u/tannewt/pages/robert-feranec-stream-notes">Download examples from the video here</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Starting with RP2040 / RP2350 PICO - Programming Tutorial for Beginners | StepByStep | CircuitPython

<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/9lEtkysFGGg" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Watch how signals are travelling through a PCB. Thank you very much Yuriy Shlepnev.
    </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">00:32</span><span class="chapters-text">Fields for THICK 2 Layer PCB (1mm / 40mil)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">04:47</span><span class="chapters-text">Fields for THIN 2 Layer PCB (0.1mm / 4mil)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:44</span><span class="chapters-text">Fields size compared 1mm vs 0.1mm</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:11</span><span class="chapters-text">Crosstalk, fields, currents for 2 Layer PCB (two tracks)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">16:56</span><span class="chapters-text">Currents in track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">21:24</span><span class="chapters-text">Comparing crosstalk in numbers (2 layer PCB)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">27:43</span><span class="chapters-text">Crosstalk for 5W gap between tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:45</span><span class="chapters-text">About Simbeor simulation software</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:57</span><span class="chapters-text">Fields inside of PCB for one track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:00</span><span class="chapters-text">Fields size compared (symmetrical vs. not symmetrical)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:52</span><span class="chapters-text">Crosstalk, fields, currents inside of PCB for two tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:25</span><span class="chapters-text">Comparing crosstalk in numbers (inside PCB)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">56:29</span><span class="chapters-text">Comparing 2 layer vs inside PCB crosstalk for 5W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:00:44</span><span class="chapters-text">Animation of signal travelling through track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:04:54</span><span class="chapters-text">Animation - Moving tracks further from each other</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:07:14</span><span class="chapters-text">Signals running through both tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:10:14</span><span class="chapters-text">Adding GND track with 2 vias between tracks</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:12:12</span><span class="chapters-text">Adding many vias only</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:13:37</span><span class="chapters-text">Adding many vias and track</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:17:12</span><span class="chapters-text">Importing a real board to Simbeor and analyzing crosstalk</span></li>
    </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/yuriy-shlepnev-7b39136/">Yuriy´s LinkedIn</a></li>
            <li class="links-list-item"><a href="https://www.simberian.com/">Yuriy´s company</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Don’t design PCB without watching this!

<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/1NR7qQjDsF0" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Going through Schematic and PCB of a real project. Thank you very much Daniel Bakker
    </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">01:08</span><span class="chapters-text">Schematic</span></li>
            <li class="chapters-list-item"><span class="chapters-time">26:53</span><span class="chapters-text">PCB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">34:39</span><span class="chapters-text">Second version</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:14</span><span class="chapters-text">Enclosure</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:07:35</span><span class="chapters-text">Certification</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:14:34</span><span class="chapters-text">About Daniel</span></li>
    </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/d-g-bakker/">Daniel´s LinkedIn</a></li>
            <li class="links-list-item"><a href="https://dbee.eu/">Daniel´s company</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Custom Design Walk Through

<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/y22Ia6gJDr8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        I had to remove one chip, so I took a short video about it. You may find it useful. Simple technique to remove a small chip with Exposed pad.
    </div> 
</div>


Easy desoldering of 8-pin DFN with Exposed pad

<div class="entry-content">

    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/30078-layout-example-e1370523993840.jpg" alt="layout-example" />
    </div>

    <div class="blog-content">
        <h2 class="blog-content-heading">Tip 1: Be aware of software compatibility</h2>
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text"><b>Use the same DDR Memory chips as used on the reference board</b><br>
                Why? Different DDR2 / DDR3 memory chips may require different memory controller settings. If the settings in memory controller registers are not correct, your board may not boot.</span></li>
            <li class="content-list-item"><span class="content-text"><b>Use the same FLASH memory chip as used on the reference board</b><br>
                Why? Different NAND FLASH may not be recognized by bootloader and board may not boot. For prototype, use exactly same chip & same size as used on the reference board.</span></li>
            <li class="content-list-item"><span class="content-text"><b>Use same peripheral chips as used on the reference board</b><br>
                e.g Audio, Ethernet, … Why? If you use same chips as used on the reference board, your peripherals will be already supported by the software delivered with the reference design. Otherwise, it may take a lot of effort to add a working driver.</span></li>
            <li class="content-list-item"><span class="content-text"><b>Map devices to the same address as on the reference board</b><br>
                e.g. use same chipselects, base address, … Why? Peripherals may not be recognized or found by bootloader or OS if mapped to a different place. Software modifications is then required.</span></li>
        </ul>
    </div>

    <div class="blog-content">
        <h2 class="blog-content-heading">Tip 2: Be aware of component availability</h2>
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text"><b>Be sure, you can buy all the components from standard suppliers and in required quantity.</b><br>
                Some reference schematics are build from very hard or impossible to get components. Some component manufacturers ask design companies to use their chips to become more famous, but the manufacturer can be very small, hard to contact or  – too famous (they will ignore you). These may be for example manufacturers of power supply chips, passive components or very specific peripherals. Don’t use them, find a replacement. Two examples – Realtek and Winbond – their components are extremely hard to get.</span></li>
        </ul>
    </div>

    <div class="blog-content">
        <h2 class="blog-content-heading">Tip 3: Choose a right replacement</h2>
        Don’t forget. ARM boards are very software depended. Hardware has to be supported by software – usually by Bootloader and in OS. Otherwise, source code modification is need. This can sometimes be very very difficult, time consuming and even impossible.<br>
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text"><b>What if you have to use a peripheral which is not on the reference board?</b><br>
                First of all, have a look at ALL available reference schematics for your chip. Don’t look only in chip manufacturer schematics, check also some other designs using same chip. If you can not find any reference schematic, look for any board using same CPU and have a look what exact chips they used for your peripheral.<br><br>
                Why? If someone used it, there is a pretty good chance it will work. If you select a chip without checking, it may not work in your design – even if it should. Many chips have bugs / errata and may not behave based on specification (for example, recently I had this problem with TI & AMD processors – one didn’t meet GMII specification, the other one LPC specification – they only worked with particular peripheral chips).</span></li>
        </ul><br>
        Once your prototype is up and running, you can experiment and test bigger memories or different manufacturers.<br><br>

        Let me know if this post was helpful for you! Thank you.
    </div>

</div>

3 Tips for ARM Board Prototype 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/8GpsPRjvUXk" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This video explains difference in layout between DDR3 (fly-by topology) and DDR2 (T-branch topology). This short video is a part of Advanced PCB Layout Course.
    </div> 
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.fedevel.com/welldoneblog/2011/02/ddr-ddr2-ddr3-pcb-layout-examples/">Download the layout examples</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses/advanced-pcb-layout-course">Advanced PCB Layout Course</a></li>
        </ul>
    </div> 
</div>


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