数字万用表的设计

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1、课程名称:数字万用表的设计专业：电子信息工程班级：0学号：姓名：指导教师：目录1、设计任务·······················································31.1设计目的·····················································3231.2设计指标及要求················································32、设计思路与总体框图··············································33、系统硬件电路的设计···

2、···········································43.1主控芯片························································43.2模数转换部分·····················································43.3电阻测量输入电路················································63.4电压测量输入电路··················································73、

3、5电流输入测量电路·················································93.6自锁开关·······················································104、软件设计·························································104.1主程序设计·······················································104.2A23/D转换子模块·····························

4、·······················115、系统调试·························································115.1硬件调试··························································115.2硬件故障··························································115.3硬件调试方法·······················································125.4软件

5、调试···························································125.5软件故障···························································125.6软件调试方法······················································126实验数据处理························································126.1实验数据···························

6、·······························126.2实验数据分析······················································137总结与体会··························································137.1总结·····························································147.2体会··························································

7、·····14238参考文献·····························································149附录——程序·························································141、设计任务1．1设计目的采用A/D转换器ADC0804和STC89C51单片机，设计一台数字多用表，能进行电压、电流和电阻的测量，测量结果通过LCD液晶显示器显示，通过按键