1.通过ADC0808转换器，将模拟信号转化成数字信号，可以通过电阻的调节来控制LED数码管转速的显示，且精度达到0.01。 2.通过示波器更方便、明了地显示电阻与电压的关系，结果如图所示。(1. through the ADC0808 converter, the analog signals are converted into digital signals, and the display of the LED digital