4 100 ohm resistors 2 150 ohm resistors 8 1 kohm resistors To reliably lock and unlock the door, we ordered an electric door strike. We scored this one as an open box item from Smarthome.com.

The Apple Watch comes with several different ways to lock and unlock the device. Here's a guide on how to use all of them.

[John Boxall] of Little Bird Electronics was thinking about combination locks, and how one might improve or at least change the way these locks work. Traditional combo locks can be implemented in a… ...

Imagine if someone could clone your keys just by listening to you unlock your door? Imagine no more; these hackers can do that using a smartphone.