世界時(shí)區(qū)數(shù)字鐘的設(shè)計(jì)


目　錄

目　錄 2

摘  要 1

1緒 論 2

1.1設(shè)計(jì)目的 2

1.2設(shè)計(jì)要求 2

1.3總體設(shè)計(jì)概要： 2

2各單元模塊設(shè)計(jì)和分析 4

2.1晶體振蕩器電路 4

2.2分頻器電路 6

2.3時(shí)間計(jì)數(shù)單元 6

2.4譯碼驅(qū)動(dòng)及顯示單元 8

2.5校時(shí)電源電路 8

2.6時(shí)區(qū)變更電路 9

2.7 電源電路 9

3．電路板的制作 10

4．元器件清單 12

5．附錄 14

總    結(jié) 16

致    謝 18

參考文獻(xiàn) 19

 

摘  要

近年來，隨著電子產(chǎn)品的發(fā)展，人們對(duì)數(shù)字時(shí)鐘的要求越來越高，本文針對(duì)人們的這一需求，設(shè)計(jì)了一種可以任意調(diào)整時(shí)區(qū)及時(shí)間的世界時(shí)區(qū)數(shù)字鐘。實(shí)際上是一個(gè)對(duì)標(biāo)準(zhǔn)頻率（1Hz）進(jìn)行計(jì)數(shù)的計(jì)數(shù)電路。通常使用石英晶體振蕩器電路構(gòu)成數(shù)字鐘。因?yàn)榫w振蕩器電路給數(shù)字鐘提供一個(gè)頻率穩(wěn)定準(zhǔn)確的32768Ｈz的脈沖，可保證數(shù)字鐘的走時(shí)準(zhǔn)確及穩(wěn)定。為了方便調(diào)整時(shí)區(qū)，在次采用24進(jìn)制計(jì)數(shù)器。

Abstract：

In recent years, with the development of electronic products, the number of people getting higher and higher clock requirements, the paper against the people of this demand, a design that can be adjusted at the time and the world time zone digital clock digital clock. Is actually a standard frequency (1 Hz) to count the counting circuit. Usually use quartz crystal oscillator circuit digital clock. Because the crystal oscillator circuit to provide a digital clock frequency stability accurate 32768 Hz pulse, can guarantee that the digital clock accurate and stable path. To facilitate the adjustment of time zones, using 24-band in the counter.


關(guān)鍵詞：數(shù)字鐘、世界時(shí)區(qū)、計(jì)數(shù)器。

Key words: digital clock 、world time zone、counter.