OBI SUHARDI LUMBANTOBING, Freddy; RAHMANIAR; SIAGIAN, Parlin. Design and Build a Solar Panel-Based Water Level Detection Device with LED Indicator and Buzzer. International Conferance Of Digital Sciences And Engineering Technology , [S. l.], p. 535–541, 2025. Disponível em: https://proceeding.pancabudi.ac.id/index.php/ICDSET/article/view/394. Acesso em: 9 dec. 2025.