自己用51单片机实现的一个多种功能万年历，具备基本的日期，时钟显示，闹钟功能；同时还带有室温检测，亮度及异常温度报警等功能；液晶背光可自动调节，有夜间与白天两种模式。-Own a single chip with 51 calendar functions, with the basic date, clock display, alarm clock function but also with a room temperature detection, brightness, and ab