Sistem Kontrol Alat Pengharum Ruangan Kelas Otomatis Berbasis Arduino Berdasarkan Tingkat Kepadatan Jumlah Pengguna Ruangan Kelas

Abstract

The tool in this title is an automatic air freshener where the photodiode sensor de-tects the presence or absence of guests who pass through the door and then sends a signal to the microcontroller then the LCD displays the output from the sensor. The working system of this tool begins with the process of turning on the tool by connect-ing it with an adapter to a current source. Then the sensor will count incoming guests and outgoing guests, how to find guests in the room by counting guests enter-ing from the entrance and then subtracting guests leaving. If there are more than 50 guests in the room, the perfume will automatically spray fragrance every minute, if the guest is in the room with more than 20 guests and less than 50 guests, the per-fume will automatically spray every 5 minutes, if guests are in the room more less than 20, the perfume will automatically spray the fragrance every 10 minutes.