it is a 8051 based security system. on preesing a particular code you can lock or unlock any device. 8051 is interfaced through 2*16 lcd and 3*4 keypad.

keypad\delay.c
......\delay.h
......\delay.LST
......\delay.OBJ
......\key_lock
......\key_lock.hex
......\key_lock.lnp
......\key_lock.M51
......\key_lock.Opt
......\key_lock.plg
......\key_lock.Uv2
......\key_lock_Opt.Bak
......\key_lock_Uv2.Bak
......\keypad.c
......\keypad.h
......\keypad.LST
......\keypad.OBJ
......\lcd.c
......\lcd.h
......\lcd.LST
......\lcd.OBJ
......\lock.c
......\lock.h
......\lock.LST
......\lock.OBJ
......\main.c
......\main.LST
......\main.OBJ
......\STARTUP.A51
......\STARTUP.LST
......\STARTUP.OBJ

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