多功能数字钟的设计

作为文档封面，使用时请直接删除即可--IProtel程设计任务书 本技能、基本动手能力的强化训给出仿真结果(如波形*.sdf、数据)并说明是否达到设计意图。CB~：安装调试仿真~：撰写报告系主任(或责任教师)签名：年月日 4PCB(印刷电路板)制作 20 和多层印刷电路板设计。其中电路原理图设 (简称PCB编辑器)、零件封装编辑器(简称PCBLib编辑器)和电路板组件管分，秒的时间，并具有校验功能。同时，还2ractPROTEL99SEisthemostpopularelectroniccircuitcomputeraideddesignsoftware,oneofthetwomostProtel99SEofthecircuitprinciplediagramdesignandmulti-layerprintedcircuitboarddesign.OneofthecircuitprinciplediagramdesignbytwogroupintoacircuitdiagrameditoranddatabaseeditorThispartofthemainfunctionisto:draft,modifyandeditorofthecircuitprinciplediagram;tedandmodifydiagrampartslibraryToviewandeditthecircuitdiagramandpartslibraryvariousreports.AndthesecondpartofprintedcircuitboarddesigningprintedcircuitboardeditorhereinafterreferredtoasthePCBeditorpartsencapsulationeditor(hereinafterreferredtoasPCBLibeditor)andcircuitboardmponentmanagerThesystemsmainfunctioncanbedraftmodifyandeditPCBandmodifypartspackagingManagementcircuitboardcomponentsAndtoutomaticwiringcontainsabasedontheshapeofthegridisnoautomaticwiringdinprintedcircuitboardofautomaticwiringwithrealwethetrainingistouseitforthecircuitprinciplechartdrawingandassembly,printedcircuitboarddesign,etc.gitalclock(1)准确计时，以数字形式显示时，分，秒的时间。(2)小时电路(3)校正时间。器的稳定度及频率的精确度决定421t121t12t23313311ff===t0.7(R+2R)C(f===1211215CCExtTrig10kQKey=AVCC2R15.1kQTRI4100nFTIMER_RATED10nF2kQ3051++AB___标准的秒脉冲。第二，是提数器有很多元件可以选择，但是要合理充分6电路图如下图。当分(秒)计数部分的个位接受秒计数部分的信号(秒计数接受的信号为振荡器经分频后输出的1HZ的标准脉冲)，计数满60后向时计数部分的十位给出一个进位信号。分(秒)十位计数部分接受个位的进位信号并7551236742U1374LS90D1U274LS90D1230679898331U174LS90D5123674U2274LS90D12306798988具有时、分、秒等校时功能。为了电路简时电路要求在小时校正时不影响分和秒的正时的计数。时校时电路和分校时电路都是一9情况要采取去抖的措施，接上电容就可U7U8U9U10U11U12DCD_HEX3523516124782471212121212127S90DU414SD74LS90D10NNNNNNNNNNNNNNN990099000099NN990000999900RRRR44444440CCCCC4kQUBU13CUBUB4kQ7UB4kQ74LS00D74LS00D74LS74LS00D74LS00DJ2J2UA500uFCUC374DJ1KeyUA500uFCUC374DJ1Key=A74LS00DC1U13A500uF74LS00D74LS00D074LS00D074LS00DC4kQ5748U209898R1R2UBR4555_TIMER_RATEUB74LS00D10kQ710kQR1R274LS90DR1R274LS90DU17A74LS00D74LS00DQA12J3QA12J3QD111236712367R1R2R1R2FG500uF053THR58053THR58074LS00D989812374LS90D1012374LS90DR10100nF0100nF67R1R274LS90D2322232212U7U8U9U10U11U12DCD_HEXDCD_HEXDCDDCD_HEXDCD_HEXDCD_HEXDCD_HEXDCD_HEX346579812121211212121212UUUUU74LS90DU4149606024444444444411111110VCC5VVC5V5VVC5VVCC215CU16B38U13CVCC215CU16B38U13CR4kQU14B3632U16D3474LS00D4kQ3074LS003045262874LS045262874LS00DU14DJ2U16CC2500uFVCCJ2U16CC2500uFVCCU15A74LS00D33J1Key=AU13A74LS00DU14CC1500uF74LS00D074LS00D074LS00D475974LS00D5V475974LS00D5V5748U20VCCR4kQ5V1236791236798R01R02ABCDU17C46R4U18B555_TIMER_RATED39432kQ564174LS0039432kQ564174LS00DU18D6010kQU22R91R9274LS90D55VCCRSTSR91R9274LS90D55VCCRSTSRIONUT123674474LS00DXFG3U17A74LS00DR01R02U18CC3500uF058U21QD58U21535274LS00D535274LS00D074LS00D49R9140R91989812R01R02R91R92ABCDC5NDC5ND74LS90D3671006774LS90DU7U8U9U10U11U12DCD_HEXDCD_HEXDCD_HEXDCD_HEXDCD_HEXDCD_HEX12023U243223U294U656U4147U51098U74LS90DU74LS90DJ1Key=AVCC5VVCCR4kQU14B26U13A74LS00D2874LS00DC1500uF74LS00D27VCC5VU19555_TIMER_RATEDR42kQVCCUTUTSRSRI535.1k452ONND10nFCND0100nF123675812367U13C74LS00DU14C74LS00D5748U20AABCDR01R02R91R9274LS90D55U21AABCDR01R02R91R9274LS90DVCC5VVCCR2384kQU16B3230U30U14D74LS00DJU3155BA74LS00D0VCC33595VVCC12U18B9R3U18B839U2274LS00D60U2274LS00D74LS00D06R9140127R92981174LS90D215C74LS00DU16C36U16D4574LS00D47U17C74LS00DU18C074LS00D4943U18D4474LS00DXFG3用鼠标左键点中元件后，按住不放，此Y键：元件上下对换6G16G1235GGGGGDPYSEGDDDU6U5U6U5UUUSN74LS48U8U9UUU7U8U9UUU7CU2VU2VC