基于单片机的数字电压表 摘要:本文介绍一种基于 89S52 单片机的一种电压测量电路,该电路采用ICL7135 高精度、双积分 A/D 转换电路,测量范围直流 0-±2000 伏,使用 LCD液晶模块显示,可以与 PC 机进行串行通信
正文着重给出了软硬件系统的各部分电路,介绍了双积分电路的原理, 89S52 的特点,ICL7135 的功能和应用,LCD1601 的功能和应用
该电路设计新颖、功能强大、可扩展性强
关键词:电压测量,ICL7135,双积分 A/D 转换器,1601 液晶模块Abstract : The introduction of a cost-based 89S52 MCU a voltage measurement circuits, the circuits used ICL7135 high-precision, dual-scoring A/D conversion circuits, measuring scope DC 0-2000 volts, the use of LCD that can be carried out with a PC serial communications
The paper focuses on providing a software and hardware system components circuit, introduced double integral circuit theory, 89S52 features ICL7135 functions and applications, LCD1601 functions and applications
the circuit design innovative, powerful, can be expansionary strong