Design project based on LCSC development board

This project designed a voltmeter and ammeter that can digitally display the measured voltage and current.
I. Design Summary:
The main design utilizes a CW32 microcontroller with an ADC to measure the voltage across a voltage divider resistor. The measured voltage is obtained through the voltage division ratio, and the current is measured similarly. The schematic design considered range variations and auxiliary circuitry.
In the PCB design, careful attention was paid to component placement and the order of connections.
II. Hardware Circuit Composition:
The hardware primarily used a LCSC development board as the basis for the experiment. Appropriate resistors were used for voltage division to achieve the designed range, and parallel capacitors were used for filtering. Suitable capacitors, resistors, and power supplies were also used.
III. Program Flowchart:
In the software section, calibration was used to improve accuracy, and mean filtering was employed to reduce digital fluctuations.
IV. Physical Demonstration:
The physical demonstration and related videos have been uploaded as attachments.