毕业设计论文基于单片机的电子密码锁设计目 录1. 引言.......................................................................................................................................11.1 课题背景和意义.............................................................................................................11.2 电子密码锁进展趋势......................................................................................................22. 总体设计方案.......................................................................................................................22.1 电子密码锁设计的具体要求............................................................................................22.2 总体设计方案..................................................................................................................32.3 系统总体设计原理..........................................................................................................43．电子密码锁的硬件设计.......................................................................................................53.1 主控芯片 STC89C52...........................................................................................................53.2 存储电路........................................................................................................................63.3 LCD 显示模块..................................................................................................................73.4 单片机最小系统.............................................................................................................83.5 报警电路........................................................................................................................93.6 开锁电路........................................................................................................................93.7 键盘输入模块....................................................................................................
