In most natural environments, fish are able to feed themselves. However, if you wanted to help them out with some extra food, you could always build a 3D-printed boat to do the job for you, as [gokux] did.

The concept is simple enough—it’s a small radio-controlled boat that gets around the water with the aid of two paddle wheels. Driven together, the paddle wheels provide thrust, and driven in opposite directions, they provide steering. A SeeedStudio XIAO ESP32 is the brains of the operation. It listens into commands from the controller and runs the paddle drive motors with the aid of a DRV8833 motor driver module. The custom radio controller is it itself running on another ESP32, and [gokux] built it with a nice industrial style joystick which looks very satisfying to use. The two ESP32s use their onboard wireless hardware to communicate, which keeps things nicely integrated. The boat is able to potter around on the water’s surface, while using a servo-driven to deliver small doses of food when desired.

It’s a neat build, and shows just what you can whip up when you put your 3D printer to good use. If you’d like to build a bigger plastic watercraft, though, you can do that too. Video after the break.