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components used for password based lock
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Components  list for password based lock control:

AT89C51 Microcontroller , 16x2 LCD (JHD 162A) , Preset , 4x3 Membrane Keypad , VOC, LED, 10 uF Capacitor, Resisters (10K, 1K, 470ohm), Two Pin Switch, Vero Board , Crystal Oscillator , Wire .

Summary : An electronic lock is a device which has an electronic control assembly attached to it. They are provided with an access control system. This system allows the user to unlock the door with a password. The password is entered by making use of a keypad. The user can also set his password to ensure better protection. The major components include a keypad , LCD and the controller AT89C51 which belongs to the 8051 series of microcontrollers.