单片机控制adc0809做出的电压表。8路数字电压表可以测量0~5V范围内的8路输入电压植，并能在4位LED数码管上轮流显示。测量最大分辨率为0.01V，绝对测量误差约为±0.02V-Adc0809 made single-chip control voltage table. 8-channel digital voltage meter to measure the scope of 0 ~ 5V input voltage of 8-shik, and 4 in the digital tube LED display on a rotational basis. Measurement of the maximum resolution of 0.01V, the absolute measurement error is about ± 0.02V