A simple project of digital code lock system. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple.

The input is taken from a 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration I have connected an LED to that pin. Further details and working description of the project are given below

Datasheet:

AT89C2051

Working Video:

To download the schematic,code and other files click the link below:

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