数字电压表实验 本实验我们将电位计的阻值转化为模拟值读取出来，然后显示到屏幕上，这也是我们以后完成自己所需的实验功能所必须掌握的实例应用。(Digital voltmeter experiment In this experiment, we transform the resistance of potentiometer into analogue value and read it to the screen, which is an example application that