One charging port and one module, the design base plate can be freely combined, and functions such as independent switches need to be implemented by yourself.
I don’t know if the waveform is correct or not, but I tried my best to measure it. It does not generate much heat when charging at 18W and can be touched directly by hand. It is recommended that the capacitor be solid state. I used Ruilong's solid state capacitor.
The inductor is a patch inductor in engineering or a 040 horizontal bushing like mine.
This USB holder is well made.
The finished product is as follows, some pictures are attached
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