Rancang Bangun Prototipe Sistem Kontrol Penutup Ventilasi dan Pembersih Udara Otomatis Berbasis Mikrokontroler
DOI:
https://doi.org/10.25077/jfu.12.3.355-361.2023Keywords:
Kontrol penutup ventilasi, pembersih udara, sensor MQ-135, sensor MQ-7Abstract
Telah dibuat prototipe sistem kontrol ventilasi dan pembersih udara otomatis berbasis mikrokontroler menggunakan sensor MQ-135 untuk mengukur konsentrasi gas CO2 dan sensor MQ-7 untuk gas CO. Alat ini dikontrol oleh mikrokontroler untuk mengontrol ventilasi dan melakukan pembersihan udara saat konsentrasi gas CO2 dan gas CO dalam ruangan melebihi 1000 ppm dan 9 ppm. Sistem kontrol ventilasi terdiri dari motor servo yang akan menggerakkan penutup ventilasi udara. Sistem pembersih udara terdiri dari kipas DC yang dihidupkan oleh relay yang akan berputar untuk mengeluarkan udara kotor. Alat ini dilengkapi buzzer sebagai alarm, LCD untuk menampilkan konsentrasi masing-masing gas serta LED hijau dan merah yang akan hidup saat kondisi udara bersih dan kotor. Sensor MQ-135 dan sensor MQ-7 yang telah dikarakterisasi dapat mengukur konsentrasi CO2 dan CO dengan persentase kesalahan masing-masing  sebesar 1,48% dan 3,53%. Hasil pengujan menunjukkan bahwa prototipe sistem mampu mengukur kadar CO2 dan CO pada kondisi udara kotor dengan konsentrasi yang terukur paling tinggi adalah 1544 ppm dan 9 ppm, motor servo mampu menutup ventilasi dan kipas DC mengeluarkan udara kotor.
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