What exactly do I do with the relay?

Question

Can you please go to this website and tell me what I do with the relay and what I would do to hook the digital entry lock up to a computer?
http://www.geocities.com/martin_pc_maintenace/img006.jpg

Sorry, that's the wrong web address. This is the right one:
http://www.geocities.com/martin_pc_maintenance/img006.jpg

Still the wrong one. This one will work, I promise:
http://www.geocities.com/martin_pc_maintenance/img006.jpg

Answer 1

The relay is used to keep the power to the electrical socket turned off until the correct combination is entered into the digital entry lock. Of course, if someone wanted to use the computer, they could just plug it into another socket somewhere else -- the lock won't stop them then.

Since you don't fully understand this circuit and it contains deadly voltages (120VAC), I won't attempt to help you with it -- it's just too dangerous for a novice.

However, I have a different suggestion to prevent access. If this is for a PC (not a Mac), you can use the password option in the BIOS. Most PC BIOS's have a password that the owner can set. The computer won't boot at all (including floppies or DVD/CD's) unless this password is entered first.

As the computer starts to boot up, enter the BIOS (your manual can tell you the keys to press to do this) and go through the menus looking for the Security section. You should find a place to enter a password. REMEMBER the password! (It usually can be erased, but that is a very difficult task that requires opening the computer case, along with the method of how to do it on that particular motherboard). After rebooting the computer, the only ones who can use it are those that know the BIOS password...