6、arm,lock,decryptandchangepassword.This design is about 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 an
7、d software programs can achieve such functions like password 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