Low-Cost and Energy-Efficient Security System Using Passive Infrared Sensor (Ir). International Journal of Food and Nutritional Sciences, [S. l.], v. 10, n. 9, p. 445–450, 2021. Disponível em: https://www.ijfans.org/index.php/Journal/article/view/4117. Acesso em: 12 aug. 2026.