3.设计方案...........................................................4
4.数据采集器的电路设计..............................................5
4.1 电源电路的设计..................................................5
4.2 数据输入电路设计..................................................5
4.3 ICL7109 与 89C51 单片机的硬件接口设计............................6
4.3.1 ICL7109 的内部结构与芯片引脚功能................................7
4.4 单片机转串口与计算机通信设计....................................10
4.6 整体电路........................................................11
4.6.1 整体电路原理图..............................................12
4.6 整体电路 PCB 图...................................................13
5. 软件调试..........................................................16
5.1 程序流程图.......................................................16
5.2 程序清单.........................................................16
6. 电路的装配与调试过程..............................................17
6.1 电路焊接..........................................................17
6.2 调试过程..........................................................17
7 收获、体会和建议....................................................18
致谢..................................................................18
参考文献..............................................................18
附录 元件清单.........................................................19
1 设计目的