超级电子钟源程序。 功能超强，一天可8个定时，年、月、日、星期、时、分 万年厉等，外围超简单，几呼不用其它元件单个89C2051+LED.-Super electronic clock source. Powerful, day 8 timing, year, month, day, weeks, hours, minutes, years, etc. Li, external ultra-simple, a few other components do not have a single