Sure, you could always shell out a few hundred bucks for an app-based security system. But why bother with that when you can make your own? All you need is a Raspberry Pi, 3D-printed parts and a high torque servo (and patience with yourself). If you don’t have a 3D printer, you can check out Hacker House’s alternatives to fit the parts needed. For exact materials, check out the video’s description box for more details.
We actually like the style of the end result more than those neat and tidy store-bought alternatives. It gives it a Terminator-style edge.
Via Hacker House