本例利用ADC0809 的A/D 转换原理，将被测的多路模拟量转换成数字量,并

用数字方式显示测量结果。本系统以单片机AT89C52 为系统的控制核心,结合A/D 转换

芯片ADC0809 设计一个多路电压采集系统，其中A/D 转换结果经过AT89C52 处理，最后

通过数码管显示相应的数值。本系统通过一个按键可以选择8 路0－5V 之间的直流电压

值进行测量，并在四位数码管上显示相应的数值。读数据准确，测量方便。-In this case the use of ADC0809 A/D conversion principle, the measured multi-channel analog to digital conversion, and measurement with digital display. The system of control for the system AT89C52 microcontroller core, combined with A/D converter chip ADC0809 Multi-voltage design a collection system, in which A/D conversion result after AT89C52, at last, through the digital display the corresponding value. The system via a button you can choose between 8-way 0-5V DC voltage measurement and digital display of the four corresponding values. Reading the data is accurate, convenient measurements.