DAHOU, Hamad, Abdelkader Mezouari, Abdelkarim Zemmouri, Rachid Elgouri, and Hlou Laamari. 2023. “The Help System for a Deaf Person Based on Arduino and the Pulse Width Modulation (PWM)”. Progress in Electrical Engineering and Applied Physics 1 (3):12-19. https://doi.org/10.5281/zenodo.10397250.