代码是一个完整的电子密码锁程序，通过输入密码控制锁的开合（用继电器模拟），采用1602液晶显示，程序具有节能设置，当长时间没有人靠近锁时（20s左右），单片机进入睡眠模式，液晶关闭，最大限度减少功耗，外部人体感应开关感应到有人接近时自动从睡眠状态恢复-Code is a complete electronic lock program, lock by entering the password control the opening and closing (with relay analog), using liquid crystal display 1602, the program has the energy-saving setting, when no one close to the lock a long time (20s or so), monolithic machine into sleep mode, LCD off, to minimize power consumption, the external body sensor to sensor switch automatically when someone close to resume from sleep