novel locking system

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Pauline B


Date added:

March 23, 2015








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2 / 396


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LCD, Keypad. The LCD display provides a friendly interface to the user guiding through each step. While entering the 4-digit password, the microcontroller accepts one digit at a time and subsequently compares each digit to the stored password. Once the correct password is entered, the microcontroller sends output signals to the LCDs to inform the user that he or she may proceed with unlocking the door...
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The microcontroller also sends an output pulse to trigger the solenoid lock. If the user opts to change the current password, the microcontroller sends output to LCD informing the user about the password change mode. Then, the micro controller accepts the next four numbers entered by the user and replaces the stored password with these numbers...
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