5、改、信息的显示、键盘的锁定、系统报警、开锁和闭锁等功能。在设计中，利用识别密码是否正确来开锁或报警，通过串行存储器AT24C02来实现密码的修改和存储关键词:AT89C51单片机，密码锁，矩阵键盘6AbstractThethesistellusthatHowtomadeaeletroniccodedlock,thesystemwascomposedofmcusystems,matrixkeyboard,LEDdisplayandalarmsystem.theycanopenlock,alarm,lock,decryptandchangepassword.This design is a
6、bout combination lock, based on the AT89C51 single-chip microcomputer as the core of controlling goals. This design in which the AT89C51 single-chip microcomputer as the core of the controlling goals cooperated with relevant circuits and software programs can achieve such functions like password
7、 input and modification, information display, keyboard locking, warning system, and the openness and closeness of the lock etc. In this design, the openness of lock and alarming aaccording to identifying the password, and pa
