Abstract:

Single Chip Microcomputer (SCM) is used as the main control unit.The design can unlock the door or make a warning,with the help of the peripheral circuit,such as keyboard,LCD display,AT24C02 (password memory),and remote control module.In addition,users can change the password to improve the security standard of the lock.The remote control is human-friendly and has been applied widely.

Key words: SCM;combination lock;remote control