【正文】 鄭州大學(xué)西亞斯國(guó)際學(xué)院 本科畢業(yè)論文（設(shè)計(jì)） 題 目 ： WL1 型 數(shù)字電子鐘 指導(dǎo)教師： 安家文 職稱： 教授 學(xué)生姓名： 王亮 學(xué)號(hào)： 20xx1525145 專 業(yè)： 電子設(shè)計(jì)自動(dòng)化 班級(jí)： 1 班 院 （系）： 電子信息工程學(xué)院 完成時(shí)間： I WL1 型 數(shù)字電子鐘 摘要 數(shù)字鐘電路一直以來(lái)是一種很經(jīng)典的數(shù)字電路，數(shù)字鐘的種類更是不計(jì)其數(shù)，其設(shè)計(jì)方方案也層出不窮。時(shí)間是衡量一切的尺度，所以時(shí)間對(duì)每個(gè)人來(lái)說是無(wú)比重要的。在當(dāng)今社會(huì)人們更離不開時(shí)間，鐘、表以及一切可顯示時(shí)間的事物在我們周圍隨處可見。隨著科技的日星月異的發(fā)展，數(shù)字電子鐘 /表以其體積小、重量輕、價(jià)格便宜等優(yōu)點(diǎn)已經(jīng)取代了大多數(shù)古老的機(jī)械鐘 /表。本數(shù)字鐘采取數(shù)字邏輯器件設(shè)計(jì)方案即使用市場(chǎng)上比較常用的 74 系列的集成芯片制作。電子鐘要有時(shí)、分、秒的顯示，并且要有整點(diǎn)報(bào)時(shí)功能。任何一 個(gè)鐘表都會(huì)有時(shí)間上的誤差，所以校時(shí)功能是必不可少的功能模塊。使用的主要芯片有 555 定時(shí)器、十進(jìn)制加法計(jì)數(shù)器 74ls160、兩輸入與非門 74ls00、 7 段數(shù)碼管譯碼器 7448和 7 段數(shù)碼管等。電路的時(shí)鐘信號(hào)產(chǎn)生模塊用 555 定時(shí)器完成，記時(shí)模塊用十進(jìn)制計(jì)數(shù)器實(shí)現(xiàn)，其顯示模塊是由 7段數(shù)碼管譯碼器 7448 和 7段數(shù)碼管組成。此外該電路還有驗(yàn)燈功能。 關(guān)鍵字 : 555定時(shí)器 /十進(jìn)制加法計(jì)數(shù)器 /7段數(shù)碼管譯碼器 /7段數(shù)碼管 /時(shí)鐘信號(hào) /校時(shí) /整點(diǎn)報(bào)時(shí) /驗(yàn)燈 II Digital electronic clock Summary Digital clock circuit has always been a classic digital circuits, numerous types of digital clock, designed party programs are endless. Time is the measure of all scales, time is extremely important for everyone. In today39。s society people can not do without, clocks and watches, as well as all display time things around us everywhere. With the technology Xingyue exclusive development of digital electronic clock / watch its small size, light weight, cheap, etc. have replaced most of the old mechanical clock / watch. Take the digital clock digital logic design that the use of the more monly used 74series chip production. Electronic clock sometimes, minutes, seconds display, and have a whole hour. Any one of the watches will have time error correction function is essential to the function module. Use 555 timer chip, decimal addition counter 74LS160, twoinput NAND gate 74LS00, 7segment LED decoder 7448 and 7segment digital tube. Circuit clock signal generation module 555 timer, chronograph module decimal counter display module 7segment decoder 7448 and 7segment digital tube. In addition, the circuit also has experience in the light function. Keywords: 555 timer/ the counter of the decimal addition/ 7segment decoder/ 7segment LED clock signal/ school/ the whole point of time/ inspection lights 目錄 目錄 ................................................................................................................................. 1 1 引言 ........................................................................................................................... 1 2 設(shè)計(jì)方案的選取與論證 ................................................................................................. 2 3 WL1 型數(shù)字電子鐘 ....................................................................................................... 3 WL1 型數(shù)字鐘電路框圖 ....................................................................................... 3 HYPERLINK \l _Toc2351 WL1 型數(shù)字鐘電路原理分析 ........................................ 4 WL1 型數(shù)字鐘的整體電路原理圖 ............................................................... 5 振蕩電路 .................................................................................................... 6 計(jì)數(shù)電路 .................................................................................................... 9 校時(shí)電路 ..................................................................................................12 整點(diǎn)報(bào)時(shí)電路 ...........................................................................................13 譯碼與顯示電路 .......................................................................................15 驗(yàn) 燈電路 ...................................................................................................18 4 整機(jī)工作流程綜述 .......................................................................................................18 數(shù)字電子鐘的仿真與 PCB 圖 ..............................................................................19 電子鐘仿真圖 ............................................................................................19 數(shù)字 電子鐘 PCB 圖 ...................................................................................20 圖 15 數(shù)字電子鐘的 PCB 圖 ............................................................................................20 總結(jié) ................................................................................................................................21 致 謝 ............................................................................................................................22 參考文獻(xiàn) .........................................................................................................................23 1 1 引言 隨著電子科技的日星月異的發(fā)展，特別是步入 21 世紀(jì)以來(lái)，電子技術(shù)更是得到了長(zhǎng)足的進(jìn)步，各類電子產(chǎn)品也被應(yīng)用于人們生活中的方方面面，大到飛機(jī)火車，小到手機(jī)電燈。人們的生活越來(lái)越離不開電子，特別是電子鐘 /