Cat door unlocks via facial recognition

Faced with critters trying to get in and a cat that loved to show them her latest kill, the folks at Quantum Picture came up with a system that unlocks the cat door based on image recognition. As you can see above, it uses a camera to capture the profile of anything approaching the cat door. That image is compared to stored positive identification sets, making up a feline positive identification protocol. Don’t think this is necessary? In the writeup there’s a couple of images showing the outline of a skunk. Sounds like this system is a necessity.

We wonder if this lucky cat also has an Internet enabled cat feeder?

[Thanks Stephen]

Open source artillery

Thanks to [Josh, Kyle, and Mike], it is now possible to wage (Nerf) war with an Arduino. The turret designed around it is capable of shooting 6 foam projectiles in close succession, between reloads. The faux weapon interfaces with a computer through the Arduino’s onboard serial link (via USB). Software on the PC sends commands to the Arduino, which then executes functions, such as panning, tilting, firing, and rotating the cylinder. The power for the firing itself comes from a 5 gal, 80 psi air compressor. The Java software on the host PC also does smarter things, like show streaming video from the turret’s webcam and even performs basic object tracking (with mixed success). All the code for building the brute is available on [Josh's] website.