设计三位二进制串行输入数字锁

当收到三依次为与规定码相符的二进制数后，可以开锁，且相应绿灯亮

若1、码字不对

2、码过长或过短

3、操作程序不对

都视为错。错时红灯亮，错误2次报警，即喇叭响，并无法继续操作，直至输入管理员密码，可重新开始，并且添加了密码修改部分，在开门的状态下，用户可以修改数字锁的密码，以便可以灵活的改变密码，更加安全可靠。

-design three binary serial number lock when the input received three were in line with the provisions of the binary code number, can unlock, and accordingly if a bright green, not two code words, code is too long or too short 3, procedures are not regarded as wrong. When the red light is wrong, wrong 2nd alarm, horn ring for, and unable to continue to operate until the administrator password. the re-start, and add a password to amend part in the open state, the user can change the password lock. to be flexible to change passwords more secure.