USB-HUB of the Electronics Association’s Campus Training Program

1. Project Introduction
       The original intention of this project is to provide a learning path for freshmen, including a whole process of attending classes, practicing, correcting, and then making boards and welding by themselves, so that freshmen can not only learn the introduction to PCB, but also pass a whole process. Complete the process independently to better master knowledge.
        The entire project was designed by the Electronics Association, which involved the layout of plug-ins, the hollowing out of slots, the theoretical and practical knowledge of differential lines, and the design of protection circuits. However, the number of wirings was not large, and the result was very practical. Therefore, it was unanimously decided that this project would be the first introductory training.
2.
       The purpose of using SL2.1A in project design is because the welding ability of novices is not enough, and the design difficulty will increase. If there are too many people, the problem may not be solved so quickly, so this design can be relatively simple. The fuse uses a 5V/500mA resettable fuse, which can be replaced by 0603 0Ω. Considering the welding reason, the package can be upgraded to a 0805 pad. A total of 5-way insurance is designed to ensure safety. The electrolytic capacitor can be replaced by a tantalum capacitor, which does not need to be so large. Due to cost considerations, this project does not use a 12M crystal oscillator. If necessary, you can add it yourself.
3.
       Since the project test needs to test the ultimate performance, all U disks that use USB3.0, read 130M/S, and write 45M/S, can basically reach the performance of USB2.0 under the speed test of this product.