A DIY project shows how to build an RC boat with a 3D printer, some electronics and craftsmanship that is not only remote-controlled but can also feed fish. The maker “gokux” offers the 3D print files for free on Thingiverse and explains the entire building process on Instructables as well as in a supplementary YouTube video.
The RC boat uses the ESP-NOW protocol. This eliminates the need for a separate radio module. This reduces complexity and significantly lowers costs. A test showed a range of around 200 meters. The design uses water bottles as floats, which provide stability.
The project’s electronics are based on a Seeed Studio Xiao ESP32C3 as the control unit. The motor is controlled by a DRV8833 motor driver, while a 360° servo opens the feed compartment. Power is supplied by rechargeable batteries, which provide the required voltage with the help of an MT3608 voltage booster. The transmitter, also built in-house, has a joystick to control the movements and a button to release the feed. Operation is kept simple and the transmitter can be charged via USB-C. A battery indicator shows the charge level.
The boat is assembled from various 3D-printed components manufactured with a layer thickness of 0.2 mm and 30% infill. The construction was designed with Fusion 360 and is divided into several segments to facilitate printing and assembly. An adjustable bracket for the floats ensures stability in the water. Initial tests have shown that the flexible adjustment of the floats balances the boat perfectly.
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