基于单片机的万用表设计  

Multimeter Design Based on MCU

作　　者：祝凤金[1] 

机构地区：[1]菏泽学院机电工程系,菏泽274000

出　　处：《电子技术（上海）》2011年第1期50-51,49,共3页Electronic Technology

摘　　要：本万用表通过采集电压值与频率值等物理量反推出相应的电阻、电容、电感以及频率值,利用DDS芯片发生任意频率波形,采用STC89C52通过外部按键选择与设置系统的工作状态,外部各个开关配合使表笔选通不同硬件电路从而产生相应元件的电压或频率信号供软件处理,外设12864液晶屏显示系统工作结果,可实现结果的调回。The multimeter that is designed by us based on MCU acquires physical quantity, such as voltage and frequency to deduce corresponding resistance, capacitance, inductance, voltage, and frequency, utilizes DDS chip to generate arbitrary waveforms, uses STC89C52 to select and set system＇s operation status through external buttons. The function of the multimeter is selected by switch. The system results display on LCD screen, and also can be reviewed through saved in MCU.

关 键 词：万用电表 STC89C52 波形发生器 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]