再锁开的状态下输入密码，设置的密码共四位，用数据开关k1-k10分别代表1,2。。。9,0，输入密码用用数码管显示，用一位输出电平 的状态代表琐的开闭状态。为保证密码锁主人能打开锁，设置一个万能密码，能在主人忘记密码是使用。-To open the state to lock the password, set the password of four, with the data switch k1-k10 representing 1,2. . . 9,0, enter the password to use with a digital display, with an output level of the state on behalf of petty of open and closed. To ensure that owners can actually unlock the password lock, set a universal password, can use the master password is forgotten.