STC8H3K64S2 makes 12864LCD dual-channel voltage and current capacity meter

Copy the homework of the great god and share the process
https://www.mydigit.cn/thread-298246-4-1.html
https://oshwhub.com/13977300488/stc8h3k-tssop20-dian-ya-dian-liu-biao_copy_copy_copy
First post the finished product picture, the interface is complete, usb typc-c xt30
 
 
 
 
 
 
 
 
originally used the disassembled card machine screen, replaced with tb 9.9 free shipping st7567 LCD128*64, this screen has many twists and turns. It turns out that 3.3v can't light up but only the backlight. It must be greater than 4.2v to be normal. I originally wanted to power it with a lithium battery, and the ldo couldn't work properly under 5v, so I had to change to an external power supply.
 
 
https://item.taobao.com/item.htm?spm=a1z0d.6639537.1997196601.235.687274840CoKtg&id=588631508167
 
 
4-19 Now I directly fly the wires and add a physical toggle switch to solve the problem of low voltage and cannot start. XL1059 adjusts the voltage to 4.2v, and 5v input is finally possible. I have tried 3 meters, 2 hardware ina266, one esp32 pico d4, and one stm32. STC8H is a pure 12-bit ADC microcontroller. The accuracy 
of STC8H microcontroller is ok. It turns out that the previous STC8 The program of the 15 series is different. This screen is too big. I want to port it to 0.96tft or 0.96oled. I spent a day to light up a 0.96 oled, but the tft can't light up and flickers. I don't have the ability to do it. I won't bother anymore.