3 digit code lock
I would like to build a 3 digit code lock using a 9 digit keypad,
(and Reynolds Electronics Serial Keypad preprogramed PIC) to enter a
security code to a BS1, (with a 32,768 Hz Xtal and 4060 for a time
base). When the correct code is entered the stamp would close a
relay which would open a door.
I also would like the code to change every two weeks, and the ability
to store about 20, 3 digit codes. The first code would be used for
the first two weeks, then a second code would be used. After the 20
codes were used, it would restart with the first code.
Any suggestions on code or another hardware option would be
appreciated?
(and Reynolds Electronics Serial Keypad preprogramed PIC) to enter a
security code to a BS1, (with a 32,768 Hz Xtal and 4060 for a time
base). When the correct code is entered the stamp would close a
relay which would open a door.
I also would like the code to change every two weeks, and the ability
to store about 20, 3 digit codes. The first code would be used for
the first two weeks, then a second code would be used. After the 20
codes were used, it would restart with the first code.
Any suggestions on code or another hardware option would be
appreciated?