这是内部有10位ADC的一个简单应用，这个电路最多测量30 V DC，可以应用在台式电源或各种系统中的面板仪表。

PIC16F676的内部adc与一个电阻网络分压器用于测量输入电压，用数码管来显示电压值，频率在50HZ左右

在原理图中的47K看到和10K电位连接分压器配置。在默认情况PIC微控制器ADC参考电压设置到VCC（+ 5V在这种情况下），分出最大射程30伏到5伏这样的分压器。(This is a simple application with 10 bit ADC inside. This circuit measures at most 30 V DC, and can be used in desktop power supply or panel meters in various systems.
PIC16F676 internal ADC and a resistor network divider used to measure the input voltage, digital tube to display voltage values, the frequency is about 50HZ
In the schematic, the 47K is seen and the 10K potential is connected to the voltage divider configuration. By default, the PIC microcontroller ADC reference voltage is set to VCC (+ 5V in this case), dividing the maximum range from 30 volts to 5 volts for such a voltage divider.)