汽车车灯控制电路重点.doc

课 程 设 计 说 明 书 课程设计名称： 电子技术课程设计 题 目： 汽车车灯控制电路 学 生 姓 名： 陈 杰 专 业： 电气工程及其自动化 学 号： 3120140806620 指 导 教师： 吴昌东 日期：2016年 7 月 1日 汽车车灯控制电路 摘 要:本方案设计了一个“汽车车灯控制电路”。“汽车车灯控制电路”作为电子技术基础课程的一个实践，采用74LS138译码器控制输出实现对六盏指示灯的控制，并配合74LS76JK触发器实现三进制循环计数器控制，即可轻易实现汽车正常运行和刹车的情况模拟。为实现汽车左右转弯时车灯循环闪烁的功能，需要配合74LS138译码器的另一输入S1即可实现。定时脉冲源部分由555定时器组成的多谐振荡器电路实现。 关键词：汽车；指示灯，74LS138，555定时器 Abstract: The design of this project is a Automobile lamp control circuit, as a basic course of electronic technology practice. In order to realize the control of the six pilot lamp, automobile lamp control circuit uses the 74LS138 decoder to control the output, and with the 74LS76JK trigger to achieve three decimal cycle counter control, so that can easily achieve simulation of normal operation of the car and brake. In order to realize the function of cycle flashing of the lamp when the vehicle turns around，needs to cooperate with the another input S1 of the 74LS138 decoder . The timing pulse source is realized by the circuit of multivibrator circuit composed of 555 timer. Keyword: Automobile，pilot lamp，74LS138，555 timer 目 录 1.前言···································································1 1.1设计背景1 1.2设计目标1 1.3设计概述1 1.4设计计划1 2.方案设计与选择·························································2 2.1 方案比较···························································2 2.1.1方案一··························································2 2.1.2方案二··························································2 2.2 方案论证···························································3 2.3 方案选择···························································3 3.总体设计方案···························································4 3.1 设计思路·······················