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数字电子钟设置成24小时制的操作方法如下： 按下复位键即可将数码电子钟设置成24小时制，按下上调键3秒种左右，此时可以进行12/24小时制的切换。 希望我的回答能够帮助到您哦。
电路图在我空间相册 : oo
找一下256正确宣示都亮的段，对比你的256那段没有宣示出来出来。应该就是那一段的引脚短路或者短路啦。。。
呵呵。我没有做过这个。要现在做。得花时间，不好意思。如果我有现成的。我肯定给你。急求数字电子钟逻辑电路设计
一点都没有，里面就是那么几个零件做的，没高压没高频，说白了，就是没有产生辐射的条件。除非你的东西外壳是铀做的（根本不可能）
基本功能：时间显示，在制作的过程中，你也会学到许多关于数字电路的知识，比如：计数器，译码器等。如果你是基于单片机的，是一个很好的单片机练习课题。
00h ajmp start 03h ajmp jia 0bh ajmp saomiao 13h ajmp jian 1bh ajmp jishu 2bh start: mov ie,#10001111b mov ip,#00000010b mov tmod,#00100010b mov th1,#6 mov tl1,#6 mov th0,#88h mov tl0,#88h setb it1 setb it0 mov r4,#11111110b mov sp,#30h mov 20h,#00h mov p3,#0ffh mov r0,#00h mov r1,#00h mov r2,#00h mov r3,#00h mov r5,#00h mov dptr,#table setb tr1 setb tr0 loop: mov a,r0 mov b,#40 div ab jz chuli mov r0,#00h inc r5 mov a,r5 mov b,#100 div ab jz chuli cpl mov r5,#00h inc r1 mov a,r1 cpl a mov p2,a cpl a mov b,#60 div ab jz chuli mov r1,#00h inc r2 mov a,r2 mov b,#60 div ab jz chuli mov r2,#00h inc r3 mov a,r3 mov b,#24 div ab jz chuli mov r3,#00h chuli: mov a,r2 mov b,#10 div ab mov 10h,b mov 11h,a mov a,r3 mov b,#10 div ab mov 12h,b mov 13h,a jb mov r1,#00h mov 87h,#01h ljmp loop jia: push a inc r2 mov a,r2 mov b,#60 div ab jz next1 mov r2,#00h next1: lcall ys clr ie0 pop a reti jian: push a inc r3 mov a,r3 mov b,#24 div ab jz next2 mov r3,#00h next2: lcall ys clr ie1 pop a reti jishu: inc r0 reti saomiao: push a mov a,r4 rl a mov p0,#0ffh d0: cjne a,#11111110b,d1 mov p1,a mov r4,a mov a,11h jnz zc mov a,r4 rl a mov p1,a zc: mov a,10h movc a,@a+dptr mov p0,a sjmp over d1: cjne a,#11111101b,d2 mov p1,a mov r4,a mov a,11h jz over movc a,@a+dptr mov p0,a sjmp over d2: cjne a,#11111011b,d3 mov p1,a mov r4,a mov a,12h movc a,@a+dptr mov p0,a mov c, mov sjmp over d3: cjne a,#11110111b,d4 mov p1,a mov r4,a mov a,13h jz over movc a,@a+dptr mov p0,a sjmp over d4: mov a,#11111110b ajmp d0 over: pop a reti ys: mov 14h,#0ffh a0: mov 15h,#0ffh a1: djnz 15h,a1 djnz 14h,a0 ret table: db 0c0h db 0f9h db 0a4h db 0b0h db 099h db 092h db 082h db 0f8h db 080h db 090h end
数字9是显示的，过了一秒再进位，中间一共过了10秒钟啊。
到中国知网论文数据库找，论文多，而且质量高。自己懒得找，可以去淘宝的（翰林书店）店铺看看，店主应该能帮你下载到这论文的
电子手表和数字电子钟，只是大小不一样，其功能都是大同小异的。
牙签victor
电子钟相关毕业设计 ·数字电子钟的电路设计 (字数:9242,页数:22 )·数字电子钟的设计与制作 (字数:8017,页数:22 )·数字钟的设计 (字数:6208,页数:21 )·基于8051单片机的数字钟 (字数:21638,页数:50)·基于单片机的电子时钟控制系统 (字数:7935,页数:42 )·数字电路数字钟设计 (字数:4846,页数:21 )·电子闹钟设计 (字数:4094,页数:19 )·定时闹钟设计 (字数:5714,页数:24 )·智能定时闹钟设计 (字数:3826,页数:18 )·下棋定时钟设计 (字数:5290,页数:24 )·多功能数字钟设计与制作 (字数:13129,页数:34)·基于单片机的电子钟设计 (字数:7710,页数:24 )·基于单片机的数字电子钟设计 (字数:10301,页数:42)·基于Labview的虚拟数字钟设计 (字数:17457,页数:32)·电子日历钟 (字数:10677,页数:33)·数字钟的设计与制作 (字数:4922,页数:23 )·单片机数字钟设计 (字数:15355,页数:47)·基于单片机的数字钟设计 (字数:12541,页数:27)·单片机定时闹钟设计 (字数:8450,页数:24 )·万年历可编程电子钟控电铃 (字数:14371.页数:41)·数字定时闹钟设计 (字数:7770,页数:28 )·基于EDA技术的数字电子钟设计 (字数:12247,页数:32)·多功能时钟打点系统设计 (字数:8353,页数:31 )·智能音乐闹钟设计 (字数:10002,页数:37)·基于AT89S51单片机的数字电子钟设计 (字数:14560,页数:39)
爱尔兰咖啡啊
Computers have accelerated the transformation of the world's human pace, but it is after all bulky. SCM in this case was born. As of today, SCM application rapid development of technology, looking around us now in all spheres of life, from missiles, navigation equipment, to the various instruments on the aircraft control from a computer network communications and data transmission, industrial automation to real-time process control and data processing, and our lives extensive use of the smart card, electronic pets, which is inseparable from the microcontroller. Monolithic single-chip micro-computer or computer. (Single-Chip Microcomputer) is the set of CPU, RAM, ROM, the timing, number and variety of interface integrated microcontrollers. Its small size, low cost, high performance, which are widely used in smart industries, and industrial automation. And 51 Series SCM SCM is the most typical and the most representative one. The graduation design Through the study, and thereby achieve the study, design, development hardware and software capabilities. Based on a microcontroller based on the will to achieve timing, stopwatch, calendar, alarm clocks, and other functions of a multi-functional electronic clock design study, in detail, the computer application of data conversion, Principle LCD, keyboard scanning principle, SCM regularly interrupted principle. Thereby achieve studying and understanding the relevant directives SCM in all aspects of the application. By AT89S52 system, temperature detection chip, the clock chips, liquid crystal displays, memory, Regulators and electricity supply of components, to achieve clock calendar display function can be carried out, hours seconds of the show and real-time temperature display. Also calculated with the calendar and clock, calendar calibration, regular hours and set the alarm function. The article attached circuit diagram, the PCB plans and procedures checklist for the reference of our readers. Due to limited, and it will inevitably be lighter inadequate, locations will give teachers and students correction and criticism. Keywords : stopwatch, alarm clock, calendar time
1、封面要求：A4纸打印，内容包括所属课程名称，实验名称、学生信息、合作者信息、指导老师姓名以及起止日期2、实验报告：课程名称、课程设计题目、实验目的、实验原理
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