【STC系列单片机控制下的电子钟备忘录】使用STC12C5A60S2单片机实现电子钟：“时分秒”，可设定闹钟，取消闹钟；在液晶1602上显示-[Electronic clock memo under STC series single-chip control MCU] use STC12C5A60S2 electronic bell: When every minute , can set the alarm, cancel the alarm displayed on the LCD 1