电子时钟的设计与实现_电子信息工程毕业论文_毕业论文天下网 关键词：AT89C51，LED数码管，时钟显示，定时 [gap=673]Key words: AT89C51, LED digital tube, Clock display, Timing
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Now the speed table is mostly electronic, use LED digital tube or LCD instantly shows, show more intuitive.
现在的车速表大多是电子式的，用LED数码管或LCD即时显示，显示更加直观。
The LED digital tube can display the numeral or sign, and it is usually used to show time, speed, the system's state etc.
LED数码显示管可以显示数字或符号，通常用来显示时间、速度、系统状态等。
All-color LED digital tube and all-color outdoor display screen are now used in the motion advertisement, gradually taking the place of neon light.
全彩led数码管，全彩户外显示屏，正在逐步替代霓虹灯，运用于动态广告牌上。
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