文档介绍：摘要随着社会、科技的发展,人类得知时间,从观太阳、摆钟到现在电子钟,不断研究、创新。为了在观测时间的同时,能够了解其它与人类密切相关的信息,比如温度、星期、日期等,电子万年历诞生了,它集时间、日期、星期和温度功能于一身,具有读取方便、显示直观、功能多样、电路简洁等诸多优点,符合电子仪器仪表的发展趋势,具有广阔的市场前景。该电子万年历主要采用 AT89C5 1单片机作为主控核心,由 DS1302 时钟芯片提供时钟、 LED 动态扫描显示屏显示。 AT89C5 1单片机是由 Atme l 公司推出的,功耗小,电压可选用 4~6V 电压供电; DS1302 时钟芯片是美国 DALLAS 公司推出的具有涓细电流充电功能的低功耗实时时钟芯片, 它可以对年、月、日、星期、时、分、秒进行计时,还具有闰年补偿等多种功能,而且 DS1302 的使用寿命长,误差小;数字显示是采用的 LED 液晶显示屏来显示,可以同时显示年、月、日、星期、时、分、秒和温度等信息。此外,该电子万年历还具有时间校准等功能。关键词:时钟电路; 时钟芯片 DS1302 ; LED 动态扫描; 单片机 AT89C51 ; MAX7219 ; Abstract With the society, science and technology, mankind learned that time, from the view of the sun, to the present electronic clock pendulum clock, continuous research and innovation. Observation time in the same time, be able to understand other human beings is closely related to information, such as temperature, week, date and so on, the birth of the electronic calendar, and it set the time, date, week and temperature-in-one, with easy to read, intuitive display functional diversity, and many other advantages of simple circuit with the electronic instrumentation of the development trend of the. market prospects are broad The main use of the electronic calendar AT89C51 single-chip puter as the main core, provided by the DS1302 clock chip clock, DS18B20 the temperature chip acquisition transition temperature, LED display shows the dynamic scan. AT89C51 single-chip puter is introduced by Atmel Corporation, a small power consumption, voltage can be selected 4~ 6V power supply voltage; DS1302 clock chip is introduced DALLAS fine with trickle charge function of current low-power real-time clock chip, which can of the year, month, day, week, hour, minute, second for time, also has multiple functions, such asa leap pensation, and long life of the DS1302, a small error; DS18B20 temperature chip isa digital temperature sensor with a measurement accuracy high, a simple circuit to connect the characteristics of such sensors only need a data cable for data transmission; digital