系统由单片机、显示器、键盘等部分组成，利用显示器来显示密码锁输入的相关信息，系统上电时内部默认一组数字密码（4位或4位以上）；通过键盘可以设置新密码，或进行密码校验，密码输入正确则模拟打开密码锁，密码错误则发出警报或其他提示信息(The system is composed of MCU, LCD, keyboard and other components, using the display to display information related to input password lock, when power on internal default set of digital password (4 or 4 and above); through the keyboard can set a new password, or to verify the code, password input is the correct simulation open password lock, password false alarm or other message)