Door Security Lock with Keypad

Hafiz Abdul Haseeb Tariq

Security is important everywhere. To secure things using the digits, keypads are used to take the input from the user. For this purpose, components that you need are:

Microcontroller: At89c51

Microcontroller At89c51

Keypad: cellular phone keypad (4×3)

Microcontroller At89c51 programming

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