The help system for a deaf person based on arduino and the pulse width modulation (PWM). Progress in Electrical Engineering and Applied Physics, [S. l.], v. 1, n. 3, p. 12–19, 2023. DOI: 10.5281/zenodo.10397250. Disponível em: https://p2eap.com/index.php/app/article/view/10. Acesso em: 21 nov. 2024.