一、课程设计题：单片机教学打铃控制器程序设计

二、设计要求：

用LED数码管显示时、分、秒时间，尽量减少时间积累误差，具有秒闪功能。

最多能设置40个打铃时间点，打铃时间点数据用非易失存储器存储，防止掉电丢失数据；能逐个检查、修改、删除已设置的打铃时间点和增加打铃时间点。

对时、打铃时间点用键盘设置，键盘设计简单、易于操作。

具有强电驱动功能，便于控制220V的电铃。

-First, the curriculum design title: Single-chip controller Darlin teaching program design 2, design requirements: LED digital display with hour, minute, second time, to minimize the time the accumulation of errors, with flash function seconds. Set up to 40 point in time to fight bell, bell time playing with non-volatile memory data storage, power-down to prevent loss of data　can check one by one, modify, delete set point in time to fight bell and bell playing time increase. On when the bell time playing with the keyboard settings, keyboard is designed to be simple and easy to operate. Strong function of electric drive, easy to control the bells 220V.