Face Recognition Mini Camera - Modified Version

This is a modified version of the open-source face recognition camera project by Bilibili user "工科男孙老师" (Engineering Man Sun Teacher). The hardware circuitry is compatible with the original version and can be directly programmed with released firmware.
Modifications include:
replacing all 0402 packages with 0603 packages;
replacing the power chip, Flash, buttons, serial port socket, and RGB LEDs (all components I prefer);
replacing the camera's FPC connector with a common 24-pin connector;
adding a debug programming interface; and
adding an LCD screen backlight control switch.
The attachments include manuals for the camera, screen, and main controller. The camera's interface definitions should be universal.
 
A pad for selecting the high/low level of the camera's PWDN pin has been added. Some cameras require the PWDN pin to be pulled high to work, while others require it to be pulled low. You can choose to pull it high or low depending on your camera. (My camera uses the low-level option; I researched this for a long time beforehand.)