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 we must master after we finish the experiment function we need.)