Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 PARMADI PUTRA, I.W.; ARTA WIJAYA, I. W.; BUDIASTRA, I.N.. PERANCANGAN SISTEM PEMANAS AIR MENGGUNAKAN SISTEM KENDALI PID. Jurnal SPEKTRUM, [S.l.], v. 7, n. 1, p. 116-122, mar. 2020. ISSN 2684-9186. Available at: <https://ojs.unud.ac.id/index.php/spektrum/article/view/60407>. Date accessed: 05 sep. 2026. doi: https://doi.org/10.24843/SPEKTRUM.2020.v07.i01.p17.