project summary
using pic 18f452 mic.

enter password from key pad of (4x3) which is three to four digit of passsword . if password is correct then using any port glow led and show on lcd that (password is correct) .if password is incorrect then on lcd (password is incorrct and try again).
there is option for try again
using one digit like (* ,#) from keypad we can reset it . and try again password
keypad having (colum=3, row =4 )
lcd having 16 pins
pic 18f452 having 40 pins