USBHub

It does not support USB3.0. The main chip is SL2.1A, which has been board tested and verified.

The interface is microUSB, which can be directly connected to the computer using a data cable. The four TypeA female sockets are expanded 4 USB ports, which can be used by four devices at the same time.

I drew two power supply filter capacitors, and their functions are the same. The electrolytic capacitor has better performance, so the electrolytic capacitor was soldered, and the c3 capacitor was not soldered.

Since the newly purchased soldering iron is not very good for soldering and is a bit ugly, I will just give it a try. The total cost does not exceed five yuan. Interested friends can refer to my design or the official reference design (in the chip information). Personally I feel that the size of the board is still a bit large. If necessary, the layout can be re-optimized and will be released after optimization.

It is currently exposed, and the shell is still under design. If you need it, you can pay attention. Thank you.

Precautions:

1. When wiring USB, try to route D+ and D- next to each other, and try to make them the same length;

2. The crystal oscillator should be as close as possible to the chip, and the two pins should be the same length as the corresponding pins of the chip.

3. The capacitor should be selected at the 100uF level. If possible, each USB port should be connected to a 100uF point solution capacitor (refer to the official design). The function of the capacitor is filtering and decoupling, which can increase the life of the device.

4. When plugged into the computer normally, the driver will be installed automatically. If an unrecognized USB device appears, it may be a welding problem. Focus on checking the microUSB port welding (more difficult to weld), as well as the c1 and c2 capacitor welding (c1 and c2 are required).

Official recommended design

The video demonstrates that when I plug in the USB flash drive, it appears normal on the computer. There is no instability in current use.