基于89s51单片机开发板创建的密码锁程序，电路图不能上传，密码锁使用了比较巧妙的密码锁显示位数控制来控制和检验每一位的密码正误，并带有3键密码输入系统，和多键输入系统，可以修改密码。-89s51-based single-chip development board to create the password lock procedures, circuit diagrams should not upload, password lock to use a relatively clever show the median control locks to control and test each and every password is incorrect, and 3 keys with a password entry system , and a number of key input system, you can modify your password.