[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made out of ...

With the mechanical portion of the project out of the way, he spent a great deal of time working on the door’s electronic components, including the PIC-based controller and capacitive keypad.

The Yale Approach Lock with Wi-Fi + Keypad is our pick for deadbolt adapter locks. It should work with most any single-cylinder deadbolt, is easy to install, and works quickly and reliably.

Some things don't need to be "smart." Yale's new Code keypad lock costs just $99 and doesn't connect to the internet. It's just a simple electronic lock. No need to worry about apps, software ...

For the completely tech-adverse, two keys are also included. Optionally, you can purchase a $79 add-on keypad and assign key codes, much like with other smart locks. The keypad is wireless and ...