说明：  44键盘C51单片机程序,51单片机的软件复位程序,单片机IO驱动74LS164的C51程序,单片机T2定时器实现1秒精确定时程序,单片机做的AD转换程序( adc0809程序 ),电子钟程序,流复杂一点的水灯程序
(44 keyboard C51 single-chip procedure, 51 single-chip software reset procedures, single-chip IO driver 74LS164 procedures of the C51, single-chip realization of T2 timer 1 second precision timing procedures, single-chip AD to do the conversion process (adc0809 procedures), the electronic clock procedures, the water flow a bit more complex procedures lights)