基于stc11系列单片机的电子钟，用多个74HC595级联，有多个数码管显示时间，60个led灯显示秒灯，含按键调整、闹钟等功能。-Based stc11 series single-chip electronic bell, with multiple 74HC595 cascade, there are multiple digital tube display time, 60 seconds, lights led lights display, with buttons to adju