usb power meter mini(power-s)

The mini version of the usb power meter (similar to pwoer-z) uses the same typec male connector as power-z, but the package is difficult to find, so it uses two identical typec female connector packages, both of which are plywood, so choose 0.8 mm board thickness, the protocol line between the two typecs is quite convoluted, and it cannot be triggered after changing it many times. The one I have is still the flying line version. The one in the project has been changed. I transplanted the following LVGL and added some As for controls, I just wanted to learn this library, but later I was too lazy to continue working on it. I felt that the most basic functions were enough, and there was no need to add any bells and whistles. Then the board is a four-layer board, so it can only be painted green (four layers + 0.8mm). You can also use silk screen to paint the board white like I did the first time. . . It's a bit outrageous. The screen uses a 0.96-inch st7735, the main control is a cheap stm32f401ccu6, and the detection chip is still ina226. Since the board is relatively small, DCDC is not used to reduce the voltage. I have been looking for this LDO for a long time. The input voltage is greater than 20v and it has its own losses. It is relatively small and can be tolerated by general charging voltages.