8AT89C52,ADC0809　8路数字电压表测量由A/D转换、数据处理及显示控制等组成，测量0～5V范围内的8路输入电压值，由4位共阳LED数码管轮流显示，最大分辨率0.01V，误差±0.02V。-8AT89C52, ADC0809 8 way digital voltage meter measured by A/D conversion, data processing and display control of the measurement range of 0 ~ 5V inpu