Simple ammeter

This project is a very simple CC pass-through meter (does not affect the fast charging protocol)
functions: real-time voltage, current, power, temperature near the PCB sampling resistor, recording maximum power, recording running time, recording maximum temperature and displaying Mah and Mwh;
interface : There are three interfaces, switch by left button, and the screen can be rotated by right button;
Measuring range: 26V (Max) 8A (Max);
Burning: Normal DAP connection method (requires 9.9 PowerWriter to cooperate with the software that comes with this burner) , the specific operation, the attachment has a video tutorial on the operation, of course, as long as other burners can burn hex files through the SWD interface);
PCB order: board thickness 0.8/1.0mm (recommended 0.8), V1.2 version;
cost : MCU for 1 yuan, DCDC (MP2451) for 0.7 yuan, INA219 for 4 yuan, TYPYE C male and female port together for 2 yuan, 0.96tft (st7735S) for 3 yuan;
resistance and capacitance are very common, even if 2 yuan, the cost is within 15 (purchase components according to the schematic diagram);
we are not responsible for losses caused by irregular welding and operation;
TYPYE C male and female port purchase link: Moubao one-click electronic buttons, screws and nuts: