Design of a Microcontroller-Based Photo-Controlled Circuit for Adjusting the Speed of DC Motors. Al-Mansour Journal, [S. l.], v. 22, n. 1, p. 111–123, 2022. Disponível em: https://www.journal.muc.edu.iq/journal/article/view/183. Acesso em: 1 oct. 2025.