课程设计说明书课程名称：电子技术课程设计题目：汽车报警器学院：电气信息学院专业：电气工程与自动化年级：学生：学号：指导教师：完成日期：西华大学课程设计说明书汽车报警器的设计摘要：本设计是由74LS85四位大小比较器电路，方波发生电路，555单稳态触发电路和555多谐振荡电路构成。74LS85四位大小比较电路用作密码识别，方波发生电路给单稳态触发电路送去触发信号，555单稳态电路通过改变电容电阻的值控制整个报警系统的工作时间，多谐振荡电路控制报警系统的工作频率。当盗贼在输入密码与预设的密码不符时，则触发控制开关，使555单稳态电路工作，方波发生电路则为555单稳态2脚提供触发信号，LSTTL型四位大小比较器电路输出端立刻给555单稳态系统供电，555单稳态紧接着使多谐振荡电路工作，发出报警声音。经过PROTEUS仿真，验证了设计的正确性和可行性。关键词：，报警，74LS85四位大小比较器，555单稳态，555多谐振荡。Abstract：ThisdesignmainlybytheLSTTLtypefoursizecomparisoncircuit,squarewavehappencircuit,555singlestatetriggercircuitandmorethan555resonanceswingacircuit.LSTTLtypefoursizecomparisonisusedtodoasimpleelectronictricklock,themainsquarewavecircuittosinglestatetriggercircuitsenttotriggersignal;555singlestatetriggercircuitcanmainlythroughthechangeofcapacitancevaluecontroloftheresistanceoftheworkingtimeofthealarmsystem;Resonanceswingcircuitcancontroltheworkingfrequencyofalarmsystem.Onceathiefintheinputpasswordanddefaultpasswordisnot,triggercontrolswitch,make555singlestatecircuit,andworkis555squarewavehappencircuitsinglestate2feettoprovidetriggersignals,theLSTTLtypefoursizecomparisoncircuitoutputterminalimmediatelyto555singlestatesystems,powersupply,555singlestateandthenmakewarningvoicework.AfterPROTEUSsimulationprovesthevalidityandfeasibilityofthedesign.Keywords：alarm,LSTTLtypefoursizecomparison,555singlestate,resonanceswings.西华大学课程设计说明书目录1前言.........................................................11.1设计背景...................................................21.2设计目标...................................................21.3实施计划...................................................22总体方案设计................................................22.1方案比较...................................................22.1.1方案一.....................................................22.1.1方案二.....................................................22.2方案论证...................................................32.3方案选择......................................43单元模块设计................................................5................................................................3.1各单元模块功能介绍及电路设计..................53.1.1LSTTL型四位大小比较器电路模块设计.................53.1.2方波发生电路模块设计.............................73.1.3555单稳态触发器电路模块设计......................8................................................3.1.4555多谢振荡器电路模块设计........................9I西华大学课程设计说明书3.1.5声、光报警电路模块设计..........................103.2电路参数的计算及元器件的选择.................103.2.1LSTTL型四位比较器电路..........................103.2.2方波发生电路...................................113.2.3555单稳态触发电路..............................113.2.4555多谐振荡器电路..............................113.2.5声、光报警器电路................................123.3特殊器件的介绍...............................123.3.1LSTTL型四位大小比较器介绍.......................133.3.2555定时器介绍................
