采集0-7路输入来自直流源经分压器产生的0～5 V直流电压（可功能扩展，8路可接不同的传感器，采集不同的信号,例如:温度、湿度、图象、声音等）ADC0809将各路模拟信号分别转换成8位二进制数字信号,再对各路数据进行显示。各路通道采集方式为以约5s为周期循环采集（即0路、1路……7路、0路…）约每5ms更新，重新采集一次。显示方式为循环显示和单路显示：开关打开时，循环显示0-7路采集的数据；开关闭合时，显示当前单路采集的数据。3个七段数码管显示结果:最左边的一个数码管DS0显示通道号，其它两个数码管DS1和DS2显示采集此通道的经AD转换后十六进制数据结果，范围为:00H-FFH。开关再打开时则继续循环显示。在键盘上按下任意键则退出DOS。-0-7 Acquisition of DC input source from the voltage divider created by the 0 ~ 5 V DC voltage (which can function expansion, 8-way which can be accessed by different sensors, different signal acquisition, such as: temperature, humidity, image, audio and so on) ADC0809 the various analog signals, respectively, into 8-bit binary digital signal, and then displayed on the various data. Various channels for acquisition of about 5s for the acquisition cycle (ie, 0 Road, 1 Road ... ... 7 Road, 0 path ...) updated every 5ms, re-acquisition time. Display for the display and one-way cycle show: switch is open, the cycle shows that the way data collected 0-7　open to close time, shows the current single-channel data acquisition. Seven-Segment LED 3 shows the results: the far left shows a digital control DS0 channel number, the other two DS1 and DS2 digital tube display this channel collected by the AD conversion of the hexadecimal data, range: 00H-FFH . Switch is opened again to continue the cycl