AT89X52电子密码锁设计。根据设定好的密码，采用二个按键实现密码的输入功能，当密码输入正确之后，锁就打开，如果输入的三次的密码不正确，就锁定按键3秒钟，同时发现报警声，直到没有按键按下3种后，才打开按键锁定功能；否则在3秒钟内仍有按键按下，就重新锁定按键3秒时间并报警。 -AT89X52 design of electronic locks. According to set a good password, the password used to achieve two key input function, when to enter the correct password, the lock will open, if entered incorrect password three times, on the lock button 3 seconds, the police also found the sound until there is no button three kinds of press after the key lock function to open　Otherwise there are still a matter of seconds in the 3 button press on the lock button 3 seconds to re-time and alarm.