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Design and Manufacture of Digital Clock 
Abstract£º The electronic clock mainly uses the electronic technology make the clock computerization, the digitization, with the clock precision, small size, friendly interface, scalable performance and other characteristics, was widely used in life and work. The design for the main implementing a clock/calendar can be displayed normal, collecting personal ambient temperature, with the timing alarm of the multi-function electronic clock. This design application AT89C52 as a core chips, 1602 LCD digital displaying ,using DS1302 real-time clock chip to complete the basic function of the clock/calendar. At the same time the design use of DS18B20 temperature sensors to collect the environmental temperature. The method has the advantage of being simple circuit, reliable performance, good real-time, high precision of the time and temperature , simply operation, easy programming. The electronic clock can be applied to the general living and working ,can also be modified to improve performance, add new functions, and brings more convenient to people’s life and work.  
Key words: Electronic clock; Multi-function; AT89C51; DS1302; Temperature sensor

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