Abstract:

The multiuser combination lock is characteristic of secrecy,flexibility,and safety.The master user does not need to replace the password to prevent the preceding user entry once more,thus enhancing the housing security of another user.Therefore its use may save the trouble of changing the lock to reduce the cost and enhance the security.Based on the multiuser combination lock design,the at89C51 monolithic integrated circuit chip is introduced,and hardware and software design of the multiuser combination lock are given.

Key words: micro controller unit;combination lock;security