西华大学课程设计说明书基于单片机的电容测试仪摘要: 提出了一个电容测量解决方案,采用 NE555 与被测电容构成多谐振荡器, 单片机控制多谐振荡器起振信号,采用单片机外部中断和定时器判断多谐振荡器输出一个完整方波的时间,再根据多谐振荡器匹配电阻计算得到被测电容电容值并送入液晶显示。关键词: 电容测试仪,单片机, LCD1602 , AT 89C51 Abstract: This paper puts forward a capacitance measurement solutions, using NE555 and measured capacitance constitute multivibrator, single-chip puter control multivi - brator on vibration signal, USES the monolithic external interrupt and timer judgment ltivi brator output plete square wave time, again according to the multivibrator matching resistance calculation get measured capacitance capacitance value and into the liquid crys - tal display. Keywords: capacitance measurement solutions , puter , LCD1602 , AT89C51 西华大学课程设计说明书第 I页目录 1 前言.................................................................................................................................................................................. 1 2 整体方案设计.................................................................................................................................................................. 2 方案论证.................................................................................................................................................................. 2 方案比较.................................................................................................................................................................. 3 3 单元模块设计.................................................................................................................................................................. 4 多谐振荡器模块...................................................................................................................................................... 4 单片机模块............................................................................................................................................................ 5 显示模块.................................................................
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