将拨码开关全部拨到on，将会看到数码管从 0-9 A-F逐个显示；按下8个按键中的任何一个，对应的LED灯会亮，按第一个按键时，蜂鸣器会响。-All appropriated for the DIP switch on, will see the digital tube display one by one from the 0-9 AF press 8 keys in any one, the corresponding LED lantern light, according to th