USB Power Meter (PD Spoofing)_V3.0 (Cost 15)

Voltage and current data acquisition is performed using an INA226.
 
The step-down converter is a DC-DC converter with a nominal maximum input of 32V and an output of 3.3V. In actual testing, it operated normally at a maximum PD voltage of 20V.
 
The PD trigger is a CH224K. Only CC1 is connected to the protocol chip. When CC1 is plugged in, internal triggering is used.
CC2 is directly connected to the other CC pin, using the power receiver's own PD protocol. Note that button-controlled boosting is only effective when using internal triggering; when using external device triggering, the boosting behavior is controlled by the external device.
USB 2.0 protocol is passed through, and the external power receiver supports QC and can recognize the power receiver's QC protocol.
The copper pillar holes are M3, which can be changed. This board consists of a front panel and a back panel, connected by copper pillars.
The display uses an OLED12864; mine is monochrome, but a dual-color display would be possible by changing the color, so the voltage and current on the first line would be different colors.
 
The software is attached.