Password is composed of 4 to 6 digits, when the input password, have corresponding button prompt, correct, MCU signal lock, by decoupling control of light, open a combination lock.In order to avoid the combination lock was tempted many times and decryption, input three discrepancy report to the police, the single chip microcomputer signal alarm, amplified alarm sounds.Password can modify the correct password at the same time, the indicator

electronic locks.ASM

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