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Door lock system This system uses a 4 4 keypad for user password input and lights up a green LED if the password is correct.
Door lock system This system uses a keypad for user password input and lights up a green LED if the password is correct. An LCD shows text for example "Enter password" etc... 
Door lock system
This system uses a keypad for user password input and lights up a green LED if the password is correct. An LCD shows text for example "Enter password" etc...
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