目 录目 录摘要......................................................................................................................................................................1第 1 章 引言.........................................................................................................................................................21.1 设计背景................................................................................................................................................21.2 设计主要内容........................................................................................................................................2第 2 章 系统硬件设计.........................................................................................................................................42.1 主控芯片选择........................................................................................................................................42.1.1 STC89C51 芯片介绍...................................................................................................................42.1.2 STC89C51 单片机的最小系统...................................................................................................42.2 LED 显示屏设计....................................................................................................................................62.2.1 显示器型号选择.........................................................................................................................62.2.2 LCD1602 显示器简介.................................................................................................................62.2.3 LCD1602 显示器工作原理.........................................................................................................72.3 传感器设计............................................................................................................................................82.4 AD 转换器...
