51单片机程序+PROTEUS仿真 74LS595扩展四个数码管静态显示 -51 single-chip+ PROTEUS simulation procedures for the expansion of four 74LS595 static digital tube display

74ls595的ATmega8单片机驱动程序，两片595级联与数码管构成两位计数器，Proteus仿真验证-ATmega8 of 74ls595 single-chip driver, and two digital tube 595 constitute a cascade two counters, Proteus simulation