单片机原理及应用课程设计报告 课题：电子密码锁 基本功能：可设定从1位到8位的密码，从键盘键入正确密码才可更改密码或开锁。输入三次错误密码电路就不断报警。开锁信号输出口用发光二极管表示。-Course Design Principle and Application of SCM reports Topic: electronic code lock basic functions: can be set from 1-8 in the password from the keyboar