本设计是可编程作息时间控制器设计，由单片机AT89C51芯片和LCD、LED显示器，辅以必要的电路，构成一个单片机四路可调闹钟。按照给定的时间模拟控制，实现广播、上下课打铃、灯光控制（屏幕显示）,同时具备日期和时钟显示。在这次设计中主要是用AT89S51来进行定时，4个按键的功能分别为：设置限制的时间/时的调整、显示闹钟设置的时间/分的调整、设置闹钟的时间/设置完成、闹钟更换。-This design is the programmable controller design schedule, by the microcontroller AT89C51 chip and LCD, LED display, complemented by the necessary circuitry to form a four-way adjustable microcontroller clock. According to the given time analog control, radio, playing on a school bell, lighting controls (on-screen display), along with date and clock display. In this design is mainly used to carry out regular AT89S51, four key functions are: to adjust the settings to limit the time/time, display time alarm setting/adjusting, and set the alarm time/setting, alarm clock replacement .