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1、兰州理工大学电气学院电气（8）班马强强1023046目录摘要1第一章设计要求及要求2一、设计内容及技术要求2第二章系统设计3一、系统要求3二、方案设计3三、系统工作原理3第三章单元电路设计5一、单元电路设计及元器件参数选择53.1秒信号电路53.2秒计数器的设计73.3分计数器的设计103.4时计数器的设计123.5校时电路的设计133.6报时电路的设计143.7电子钟的整体设计15第四章电路的调试、安装与测试18一、整体的设计电路18第五章总结与体会19附录21附录一电路原理图21附录二元器件清单22s
2、chool)],44housebuildingaswellasmorethan1000copiesofbooks,morethan10kindsofcollectionofnewspapersandmagazines,firesburntdown.In1938,theJapaneselearnedthatthenationalGovernmentestablishedinXITangTombrotten"clip"taxes,taxofficerslivein8ofYanDongvillagefarmer
3、shome,troopsatnight,Yaowasburnedseveralhouses.1938newmorningofSeptember18,theJapaneseteamwenttothecountryside"sweep"fromthekaiyangvillagelinetoTungYangJiaQiaoyanTemplewallandmetYangJia溇ZhouDana(male)weeksbecauseoflong-termillnessandcan'tworkinthefields,th
4、eJapaneseseehisfacefromscratchwithoutcalluses,regardhimas"Shina",thrustaknifeatthesceneofhisdeath.Thebodywasstabbed7times,wound13.Thesameday,TrangbangvillageheardtheJapanesecometo"mop-up"arehiding,motherof9ZhouGuanbaoZhangAyingtodrilla"drymound",wasdiscov
5、eredbytheJapanese,ashotintheend.Thesameday,is7zhouhaijiangzhigrandfatherZhouYingbaotoescapetheJapanesearmy,wasfoundontheroad,ashotintheend.InMarch1939,theJapanesearmyinYanTombraiding,hasarrested16people,infengqiaocigarettesthismorningbang,killing11peopleo
6、ntheRiver,Eastmeetingpointinwoodqiaotuintheafternoonkilling4peopleontheRiverside.GuTongisaJapanesegospeaktheShanghaidialect,latertobecalledGuTongas"killleft."OnJanuary18,1943,theelves,fivethousandorsixthousand,waterandlandgohandinhand"mop-up"jiaxingareawe
7、stoftherailway,YanTombareafall.March6,NiuShan(CountyGovernmentIIsectionchief)carryingitschildNiuJun(strictTombseventhdistrictChang)andtheDistrictAssistantYuXuchu,andplayersJinFuqin,andShenBaosheng,sixpeoplereceivedWujiangundergroundCountyGovernmentnotific
8、ation兰州理工大学电气学院电气（8）班马强强1023046摘要 数字电子钟实际上是一个对标准频率（1HZ）进行计数的计数电路。它将“时”，“分”，“秒”显示于人的视觉器官的计时装置。它的计时周期为24小时，显示满刻度为23时59分59秒，另外应有校时功能和报时等附加功能。因此，一个基本的数字钟电路主要由译码显示器、“时”，“分”，“秒”计数器，校时电路、报时电路和振荡器组成。主电路系统由秒信号发生器、“时、分、秒”计数器、
