用单片机及位LED数码管显示时分秒，以及24时的计时方式运行。能够整点提醒（短蜂鸣，次数代表整点时间），使用按键开关可实现时，分调整，秒表/时钟功能转换，省电（关闭显示）及定时设定提醒（蜂鸣器）等功能-With the microcontroller and LED digital tube display minutes and seconds, and 24 hours of run time. Reminded that the whole (short beep, the number of points on behalf of the whole time), can be achieved using the key switch when the sub-adjusted, stopwatch/clock function conversion, energy saving (turn off the display) and set the timer to remind (buzzer) and other functions