【CW32】Voltage and Ammeter

References for the Voltmeter/Ammeter
V1.0 : https://wiki.lckfb.com/zh-hans/dwx-cw32f030c8t6/training/voltammeter-bootcamp/voltammeter.html https://wiki.lckfb.com/zh-hans/dwx-cw32f030c8t6/beginner/ https://wiki.lckfb.com/zh-hans/dwx-cw32f030c8t6/module/screen/1-69-color-screen.html Main description: The main control chip is CW32F030C8T6. Voltage measurement has two ranges: 0~3V and 0~30V. Current measurement range: 0~3A. The display uses a 1.8-inch TFT screen. A lithium battery power supply was added for portability. A remaining issue was that the banana plug female socket's package hole was too large, making soldering difficult. It was later changed to a 5mm hole. Version 1.0 used a 4-layer PCB, which was later changed to a 2-layer board. The voltage level switch model was incorrect, preventing the connection shown in the schematic. The sampling voltage was then routed from pin 2 to the CPU debugging interface. Due to insufficient space, a UART serial port was added later for easier debugging. The purchased TFT screen was a module connected via DuPont wires, which can be replaced with an FPC cable later. Due to time constraints, the panel and casing were not designed; these will be added later.