基于MSP430单片机的智能数字电压表设计

摘要

A smart digital voltmeter design based on MSP430 MCU was introduced, including the analysis of the voltage measurement principle, and the design of electronic circuit and software. The voltmeter boasts of 010MHz frequency, 0-500V voltage and over 22MΩ input resistance as well as a 12-bit resolution. The voltmeter can select the measurement range automatically, and calibrate zero/full-scale and measure effective value of sine wave/triangle wave/rectangular wave and DC voltage. The measurement results can be displayed on LCD situated on MCU development board.%介绍了一种基于MSP430单片机的智能数字电压表设计.分析了电压测量原理、设计了硬件电路和软件.该表测量频率范围0～10MHz,测量电压范围0～500V,输入阻抗大于22MΩ,分辨率12位.能自动完成量程选择、零点/满量限校正、测量正弦波/三角波/方波的有效值,以及直流电压.操作仅用两次按键,使用非常方便.数据由单片机开发板自带LCD显示.