MOJO Power Module

  I've been dissatisfied with the battery life and charging speed of the MOJO since I got it. I modified the DC power supply. Later, I saw a solution posted by UP: 啊猫啊狗晒太阳 on Bilibili (video address: https://b23.tv/6zgnzuz), which inspired me. I added USB isolation, power isolation, and PD decoy to the original solution, changed the TYPE-C interface, and used an AT32 MCU based on what I had.
   So far, it's working fine. However, adding USB isolation doesn't completely solve the USB interference problem, which is probably an issue with the MOJO itself. At least the interference from the input source is gone now. Another issue is that the MOJO automatically powers on when the capacitor is charging after powering on. If the data USB cable is plugged in at this time, it will power off because the MOJO requires a large instantaneous current when powering on and connecting the USB driver, and the capacitor cannot provide enough current when it is not fully charged. Therefore, it is recommended to wait for the capacitor to fully charge before plugging in the data USB cable. (There is a solution: add a switch to the capacitor output terminal.) My MOJO's fiber optic port was removed because I previously modified the DC power supply, and it needs to be removed again for this modification.
  Soldering is generally not difficult; the main challenge is raising the microUSB connector to be level with the PCB. Also, be careful with the supercapacitor package; this package is only for display purposes, and you need to bend the leads when soldering the supercapacitor.
The casing is just a rough sketch; no holes are cut for the LEDs.
Main lighting effects:
LED1:
Red: Power-on input voltage error
; Yellow: Charging;
Green: Charging complete ; Yellow
-Blue: Input voltage less than 8V ; Red -Blue: Input
voltage greater than 20.5V ; Red- Green-Blue: Output voltage greater than 8.4V. LED2: Green: CH224K reaches set voltage.