用单片机实现简单的测电压功能，用七段式数码管显示电压，也可以用上位机实现实时电压-With MCU simple voltage measurement function, with a seven-segment-type digital display voltage, you can also use the PC for real-time voltage

给出电极电压，计算像管中电子运动的轨迹，并图形化显示。-Given electrode voltage, calculated as the trajectory of electron tubes and graphical display.