“汉字点阵滚动指示牌”,设计先进,显示活泼,可动态滚动显示多达40个字符或图案[使用单片机AT89C2051],若将单片机型号改为AT89C4051,则显示的字符-" Chinese characters dot matrix scrolling signs" , the design of advanced, shows lively, dynamically scrolling display up to 40 characters or pattern [using single-chip AT89C2051], if the single-chip models changed AT89C4051, showed the characters