RIGFWVQ

USB HUB_SL2.1A

Overview

Network 1 is the protective ground, connected to the signal ground with a 1M resistor and 1μf capacitor.
Considering what I want to use and possible power supply issues, I changed it to only three interfaces. If you want to change it, you can change it yourself. It is enough to plug in some small devices. The filter capacitor and interface package are changed according to actual conditions.

When plugged into Xiaoxin air15 2021, there is still a 0.5mm gap on the side, forget it. . Unexpectedly, I discovered that it can also hold an eight-piece SD short card holder, but the card holder was cut off a bit, which made me unhappy.

Preliminary judgment is that the school circuit is not well grounded and causes large interference.

Design Files

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Update:2025-06-24 05:41:23

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