USB port expansion dock

The USB docking station is practical
to solve the problem of insufficient USB ports on laptops.
It uses the classic 2.0 transmission SL2.1A chip to control more than two chips.
The main icSL2.1A
chip manual
is not much to say. Let's start with the components (in brackets) are the LiChuang numbers. Just search and add them to the shopping cart in the LiChuang mall. It's better for novices, and there are big discounts. The total price of only one is about 30 yuan. If you make 4, the average price is only 13 yuan per piece. Compared with the more than 20 yuan sold on Taobao, it is cheaper and more practical.
If you are a novice, you can go to my snowflake lamp to practice the patch welding technology first, because this TYPC-C is not worth powering or transmitting data, remember not to connect the tin.
1. Main chip SL2.1A: 2.31 yuan each (C192893) 2.31 yuan
2. USB female head: 0.92 yuan each, starting from 5 (C386738) 4.6 yuan
3. Fuse: 1.27 yuan each, starting from 5 (C207014) is necessary to prevent the electrolytic capacitor from exploding (life-saving) 6.35 yuan
4.12MHz crystal oscillator, 0.5 yuan each, starting from 5 (C114441) 2.5 yuan 5.
typc-c Female socket: 0.33 yuan each, starting from 10 pieces (C2927038), 3.3 yuan
6. Micro-B female socket: 0.16 yuan each, starting from 20 pieces (C2926996), 3.36 yuan
7. 100uF chip electrolytic capacitor: 0.16 yuan each, starting from 20 pieces (C2891567), 3.28 yuan
8. 10uF chip capacitor: 2.88 yuan for 100 pieces (C913517)
9. 100nF is 0.1uF: 1.15 yuan for 100 pieces (C15725)
10. 1K resistor: 0.44 yuan for 100 pieces (C2907113)
11. Chip LED lights: buy the color you like, which is introduced in detail in my other project snowflake lamp.
It's easy to make mistakes if you buy BOOT according to the list I made.
The attachment below contains 3D printing models that require M3 screws and nuts. You can find a lot of them by searching on Taobao.