交通信号灯课程设计报告

目录 1.前言 ······································································································· 2 2 总体方案设计 ··························································································· 3 2.1 方案论证与比较 ··········································································································· 3 2.2 方案的选择 ··············································································································· 5 3 单元模块设计 ··························································································· 6 3.1 各单元模块功能介绍及电路设计 ······················································································ 6 3.1.1 秒脉冲发生器 ········································································································ 6 3.1.2 定时器 ················································································································· 6 3.1.3 控制器 ················································································································· 8 3.1.4 译码电路 ·············································································································· 9 3.1.5 显示电路 ············································································································· 10 3.1.6 总原理图 ············································································································· 11 3.2 特殊器件的介绍 ········································································································· 11 3.2.1 74LS160 ··············································································································· 11 3.2.2 74LS153 ·············································································································· 12 3.2.3 74LS74 ··············································································································· 13 3.2.4 CD4511 ··············································································································· 14 3.2.5 NE555 ················································································································ 15 4 系统调试 ······························································································· 15 5 系统功能、原件 ······················································································ 18 5.1 系统能实现的功能 ······································································································ 18 5.2 主要元件 ·················································································································· 18 6 结论 ····································································································· 19 7 总结与体会 ···························································································· 20 8 致谢 ····································································································· 21 9 参考文献 ····································