电风扇控制数字电路课程设计报告.docVIP

家 用 电 风 扇 控 制 逻 辑 电 路 设 计 电子课程设计报告 题目名称：家用电风扇控制逻辑电路设计 姓 名：邹秀兰 专 业：通信工程 班级学号 同 组 人：曾令春 指导教师：韦芙芽 南昌航空大学信息工程学院 2010 年 9 月 日 摘要 随着我国经济的发展，居民家中的电器是越来越多，电风扇也成为了我们生活中必不可少的家用电器。以前的台式电风扇和落地式电风扇都是采用机械控制，主要控制风速和风向。然而随着电子技术的发展，目前的家用电风扇大多采用电子控制线路取代了原来的机械控制器，是电风扇的功能更强，操作也更简便。使电风扇的使用变得更为人性化。 本次课程设计的题目是：家用电风扇逻辑控制电路的设计。由三个按键分别控制风速、风种和开关，并分别用不同颜色的发光二级管来显示风扇工作的状态。附加按键提示音及定时功能。增加这些都是为了提高电风扇的人性化。基本电路是利用四片D触发器74LS175建立起“风速”及“风种”状态锁存电路，并由74LS08、74LS1517、4LS175及74LS00构成“风速”及“风种”的循环。定时部分由555单稳态脉冲电路及74LS192移位寄存器和74LS48译码器构成。 经过一系列的分析、准备。由于库房没有大的板子故将定时部分焊在另一块板子上，所以本次课程设计除在美观上有点欠缺外达到了全部的要求。 关键字:电风扇、按键、脉冲、循环。 目录 前言································································4 第一章 设计内容及要求··············································5 第二章 系统设计方案选择 2.1 方案一·····················································6 2.2 方案二·····················································6 第三章 系统组成及工作原理 3.1 系统组成···················································7 3.2 工作原理···················································8 第四章 单元电路设计、参数计算、器件选择 4.1 状态锁存电路电路············································`9 4.2 触发脉冲电路···············································11 4.3 风种控制电路···············································12 4.4 消抖电路···················································14 4.5 单稳态电路·················································15 第五章 实验、调试及测试结果与分析································16 结论······························································17 参考文献··························································18 附录一····························································18 附录二····························································20 附录三····························································22 前言 科学技术是第一生产