说明：  基于C51的室内空气净化系统 如果要将此应用项目移植到开发板上，只需要根据此项目的电路图修改管脚，改成我们开发板按键和LCD及蜂鸣器对应的管脚上，AD芯片使用的都是一样的，所以只需要将检测AD通道换成AIN3通道，也就是修改程序内通道的口即可。具体怎么修改通道口，参考基础实验例程内AD实验视频。
(Indoor air purification system based on C51 If you want to transplant this application project to the development board, you only need to modify the pin according to the circuit diagram of this project, and change it to the pin corresponding to the key of our development board, LCD and buzzer. The ad chip uses the same pin, so you only need to change the detection ad channel to ain3 channel, that is, to modify the channel port in the program. For how to modify the channel port, refer to the ad experiment video in the basic experiment routine.)