系统由单片机、显示器等部分组成，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两组数字密码（4位或4位以上）；设置其他另外密码，或进行密码校验，密码输入正确则模拟打开密码锁(The system is composed of MCU, display and other components, using the display to display information related to input password lock, when power on internal default two number password (4 or more than 4); the other set password, or to verify the code, enter the correct password is simulated to open the lock.)