The background discussed in this section will be used in the next section to actually select input capacitors, but it will also be reused for just about every other switching converter topology as well. We’ll look at different capacitor technologies and then discuss the phenomenon called power supply interaction that can arise if the input filter isn’t designed properly. Then, the input capacitors, often overlooked, are crucial not only for proper operation of the converter but also for electromagnetic compatibility or EMC. The output inductor, or the buck inductor, is the key piece of this and nearly every other switching regulator. The reason is because the level of detail. There are far fewer topics in this session than in the previous two, introductory sessions. Design philosophy for external components:.Synchronous and non-synchronous implementation of buck converters.Then, we’ll begin with the design philosophy for the input capacitors. This enables auto-reset when uploading a sketch, more on that later.In Part 2-1 of our Power Supply Design Tutorial we’re going to start a deep-dive into the buck converter and select one very important part, the output inductor. If your ESP8266 board has a DTR pin, connect it to the DTR pin of the USB-to-Serial converter.(On some boards, it's labelled RX instead of RXD, but it's the same pin.) Connect the TX-pin of the USB-to-Serial converter to the RXD pin of the ESP8266.(On some boards, it's labelled TX instead of TXD, but it's the same pin.) Connect the RX-pin of the USB-to-Serial converter to the TXD pin of the ESP8266.
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