如果连续五次密码输入错误，则门锁被强制锁上，只能用钥匙打开。技术的关键是如何使电路更加简单，操作更加简洁，反应灵敏，尽量提高安全系数。-If you enter the wrong password five times in succession, you are forced to lock the door, only with a key to open. The key is how to make the circuits more simple to operate more concise, responsive, to maximize the safety factor.