通过单片机的P1口读取矩阵键盘信息，通过单片机处理显示在共阴极数码管上。当输入大于6位实现移位。密码正确指示灯亮-P1 port of the microcontroller reads the matrix keyboard, displayed in a common cathode nixie tube through the single-chip processing. Shift when the input is greater than 6. The password is co