基于51单片机AT89C51设计一个电子密码锁

主要功能应包括：

（1）设置6位密码，密码通过键盘输入，若密码正确，通过继电器将锁打开。

（2）可以通过LCD显示输入的内容等信息。

（3）报警、锁定键盘功能。密码输入错误数码显示器会出现错误提示，若密码输入错误次数超过3次，蜂鸣器报警并且锁定键盘。

-51 AT89C51 microcontroller design an electronic combination lock main functions should include: (1) set 6 password password via keyboard input, if the password is correct, the relay will lock open. (2) can be displayed through the LCD the contents of the input information. (3) alarm, lock the keypad function. Password input error digital display an error message appears if the password entered more than three times the number of errors, buzzer alarm and lock the keyboard.