数字电子时钟设计报告

数字电子时钟设计报告 1 设计目的...........................................................4 2 设计任务...........................................................4 2.1设计指标..........................................................4 2.2设计要求..........................................................4 3数字电子钟的组成和工作原理..........................................4 3.1数字钟的构成........................................................4 3.2原理分析...........................................................4 3.3数字点钟的基本逻辑功能框图...........................................5 4．数字钟的电路设计..................................................5 4.1 电源电路的设计...................................................5 4.2 秒信号发生器的设计...............................................6 4.2.1方案一...........................................................6 4.2.2方案二...........................................................6 4.2.3两个方案的比较....................................................8 4.3时间计数电路的设计................................................9 4.4译码显示电路......................................................11 4.5正点报时电路的设计................................................13 4.6校时电路的设计....................................................14 5数字电子钟的整体电路................................................15 6电路的装配与调试过程................................................15 6.1电路焊接..........................................................16 6.2调试过程..........................................................16 7收获、体会和建议....................................................17 致谢..................................................................18 参考文献..............................................................19 附录 元件清单.........................................................20