The design and prototyping process of a foot-controlled human-computer interaction peripheral for people with upper limb motor disabilities is presented. The project, developed in an Ecuadorian university institution, is configured using the user-centered Design Thinking model. The assistive technology device, manufactured using FDM 3D printing and PLA, aims for economic accessibility and promotes sustainability through topological optimization. It integrates electronic components, such as Arduino and microcontrollers, configured with Fritzing software, for an intuitive interface that is particularly beneficial for students. With the collaboration of a physically disabled participant, the structural performance, functional efficiency, and usability of the prototype are validated through iterative feedback during the design process. Through the qualitative method and with a descriptive-analytical approach, this study identifies successes and challenges, demonstrating that, from the academy, it is possible to establish actions oriented towards generating accessible technological solutions for environments with limited resources. Among its contributions, it validates the relevance of the interdisciplinary approach between the areas of design, engineering, and health for the development of an assistive technology device. It fosters the innovation ecosystem and promotes, from an academic perspective, the inclusion and access to social participation opportunities for people with disabilities in current contexts of accelerated technological transformation.