【正文】 做到了，遇到問題一起解決，遇到挫折不會相互埋怨，最后才能過五關(guān)斬六將贏得勝利。感謝各位組員的通力合作和充分信賴，忠心感謝許老師在實驗過程中給我們的諄諄教導(dǎo)；忠心感謝學(xué)校給我提供這次課程設(shè)計的機(jī)會。參 考 文 獻(xiàn)（1）: （2）. 基于Multisim ，第二期3334The Design of Digital ClockLiang Aidi Liang Jiaan Lu Hongju（College of Engineering，South China Agricultural University Guangzhou 510642,China）Abstract: In the life of the various occasions often used electric clock, the rapid development of modern electronic technology, products of intelligent digital circuit, and the corresponding with the simple circuit, high reliability and low cost advantages, the design of digital circuit design as the core in intelligent electric clock.A digital clock is adopted, the realization of digital circuit, second readier digital display timer, widely used in individual family, station, wharf and public places such as office, as people daily life necessities, due to the development of digital IC quartz crystal oscillator and extensive application of the digital clock, the precision, clocks, watches over old shipped to the digital production and life bring great convenience, and greatly expanded the clock chime of the original function. Therefore, the digital clock and expand their application, has very realistic significance. This circuit design by timing circuit, dynamic display circuit, control circuit and display circuit ponents in the digital display tube, 24 hours timer, has cleared, maintain, school, working function, and based on this week showed increased the function.Digital clock frequency signal should be standard is stable, so 1HZ seconds to set standards pulse time source. Digital clock cycle is 24 hours, and therefore must be set by the counter, 24 hours for 60 seconds, mold and die counter and counter for 24 when the counter position, second, points, seven period by digital tube display. For digital clock with standard time, when the school when the circuit is indispensable. Design switch control when the school directly with second pulse successively in time, and points counter for school when operating. Viewers can chime in 50 seconds from 59, every 2 seconds to send a signal of du, continuously five times, the signal is punctual to end.Key words：digital clock timing give the correct time附錄1表1 元器件清單元件名稱 數(shù)量 萬能板 1雙位共陰極7段數(shù)碼管 3 CD4511集成塊 6CD4060集成塊 1 74LS00集成塊 174LS04集成塊 274LS30集成塊 174LS32集成塊 274LS74集成塊 174LS90集成塊 6IC插座 若干電阻（100K） 4電阻（10M） 1可調(diào)電容 兩個晶振32768HZ 1蜂鳴器 1按鈕開關(guān) 2連接導(dǎo)線 若干 附錄2 元件管腳圖 圖10 4060管腳圖 圖11 CD4511管腳圖 圖12 74LS00管腳圖 圖13 74LS74管腳圖 圖13 74LS04引腳圖 圖14 74LS90引腳圖 圖15 74LS30 引腳圖 圖16 74LS32引腳圖24 / 2