Exploring the oceans has always posed a dangerous challenge for humans, driving the development of underwater robots. However, access to these robots has been limited for the academic community due to high costs, hindering the study and improvement of this technology. In the face of this need, there is a demand for low-cost, accessible submarines, especially for educational purposes. This article presents the construction of a low-cost submarine, controlled by radio frequency, which employs an ingenious mechanism to adjust its density and thus control its depth. Most of the parts used were designed and produced on a 3D printer, highlighting the ease of reproduction and technological innovation behind the project.
