Sistema robótico didáctico controlado por voz para la representación del lenguaje de señas mexicano

This paper presents the development of a voice-controlled didactic robotic system designed to reproduce letters of the Mexican Sign Language (LSM). The prototype integrates eight independent servomotors, a Raspberry Pi 3-based architecture, and a PCA9685 module for coordinated motion control. A mobile application built in MIT App Inventor enables operation through Spanish voice commands or manual control, enhancing user interaction. The results show that 60% of the letters were correctly executed, 33% with minor mechanical limitations, and 7% not achieved, validating the system’s mechanical stability, gesture accuracy, and educational potential. This project fosters technological inclusion and promotes the use of robotics as a tool for social and educational learning.