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1、辽东学院毕业论文基于单片机的数字时钟系统学生姓名:学号:0943100223班级:Z1002专业:计算机应用控制指导教师:【摘要】目前,单片机在朝着高性能和多品种的方向发展的同时也进一步向着CMOS化、低功耗、小体积、大容量、高性能、低价格和外围电路内装化等几个方面发展。单片机模块中最常见的是数字钟,数字钟是一种用数字电路技术实现时、分、秒计时的装置,与机械式时钟相比具有更高的准确性和直观性,且无机械装置,具有更长的使用寿命,因此得到了广泛地使用。数字钟是采用数字电路实现对时、分、秒,数字显示的计时装置,广泛用于个人家庭,车站,码头、办公室等公共场所,成为人们日常生活中不可少的必需品,由
2、于数字集成电路的发展和石英振荡器的广泛应用,使得数字钟的精度远远超过老式钟表,钟表的数字化给人们生产生活带来了极大地方便,而且大大地扩展了钟表原先的报时功能。诸如定温自动报警、校温度自动打铃、时间程序自动控制、定温度大小限度、自动启闭路灯、定时开关烘箱、通断动力设备,甚至各种定时电气的自动启用等,所有这些,都是以钟表数字化为基础的。因此,研究数字钟及扩大其应用有着非常现实的意义。关键词:单片机DS1302LCD1602数字钟温度传感器2【Abstract】Atpresent,themonolithicintegratedcircuitwhileisfurtheralsoturningto
3、wardCMOS,thelowpowerlossandsmallvolume,thelargecapacityandhighperformance,thelowpriceandperipheralcircuitinternalinstallationtowardthedirectionsofhighperformanceandmulti-productiondevelopandotheraspectsdevelops.Whatinthemonolithicintegratedcircuitmoduleismostcommonisthedigitalclock,whenthedigital
4、clockisonekindwithdigitalcircuitrytechnicalactualization,divides,theinstallmentofsecondtime,comparedtohaveahigheraccuracyandintuitivewiththemechanicalclock,andnotmechanism,haslongerservicelife,thereforeobtainedwidelyhasused.Whenthedigitalclockisusesthedigitalcircuitryrealizes,divides,second,theti
5、mingunitofdigital,widelyisusedintheindividualhousehold,thestation,thewharf,officeandsoonpublicplaces,becomeinthepeopledailylifethenecessaryessentialitem,asaresultofthedevelopmentandwidespreadapplicationofquartzofoscillatordigitalintegratedcircuit,makingtheprecisionofdigitalclockgofarbeyondtheolds
6、tyleclockandwatch,thedigitizationofclockandwatchthelivelihoodtobringenormouslyconvenientlytothepeople,moreoversignificantlyexpandedtheclockandwatchoriginalreportingtimefunction.Suchasconstanttemperatureauto-alarmandschooltemperaturehitthebellandtimesequencingautomaticcontrol,todecidethetemperatur
7、ebigormediumlimit,automaticallyopeningandclosingthestreetlightandtimecut-outdryingovenandmake-and-breakpowerequipmentautomatically,evenvariousfixedtimeelectricitiesbeginsusingandsoonautomatically,allthese,taketheclocka