• 3D printed aeroponic misting nozzles. I followed a patent, so it can't be open sourced.
• Automatic turret to guard a pond against herons. They come during winter and eat many goldfish. This year was catastrophic enough I started developing a turret using a raspberrypi4 with a YOLO computer vision nnet with weights from Tencent (not fined tuned, I just look for big bounding boxes tagged as a bird). The "gun" is composed of a coffee machine pump and a 3D printed polycarbonate pressure tank. Pan-tilt mount using sg90 servos. I didn't finish the project because it turned out quite a lot of fishes survived, they were just very good at hiding.