ADMIRAL, T. D. Use of the 555 integrated circuit for the construction of a PWM module. Brazilian Journal of Science, [S. l.], v. 2, n. 8, p. 23–30, 2023. DOI: 10.14295/bjs.v2i8.348. Disponível em: https://periodicos.cerradopub.com.br/bjs/article/view/348. Acesso em: 22 dec. 2024.