Rancang Bangun Alat Ukur dan Indikator Kadar Air Gabah Siap Giling Berbasis Mikrokontroler dengan Sensor Fotodioda
DOI:
https://doi.org/10.25077/jfu.5.1.94-100.2016Abstract
Telah dilakukan rancang bangun alat ukur dan indikator kadar air gabah siap giling berbasis mikrokontroler dengan sensor fotodioda. Alat ini menggunakan sensor fotodioda dan LED yang dipasangkan pada timbangan yang memiliki pegas. Perubahan nilai tegangan keluaran akibat perubahan berat dikuatkan dengan penguat non-inverting dan dirubah menjadi nilai kadar air padi dan ditampilkan pada layar LCD. Kadar air acuan gabah siap giling adalah 14%. Berdasarkan hasil pengujian diperoleh bahwa alat yang dibuat dapat mengukur kadar air gabah siap giling untuk dua sampel pada proses penjemuran dari keadaaan basah 19,56% dan 21,7% sampai 14% dengan rata-rata kesalahan sebesar 3,04% dan 4,35% . Alat yang dibuat merupakan acuan untuk semua gabah yang dijemur langsung di bawah sinar matahari dan dilengkapi dengan alarm sebagai indikator ketika kadar air gabah bernilai 14%.
Kata kunci: kadar air, mikrokontroler, sensor fotodioda.
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Copyright (c) 2016 Novia Ulfa Oktavianty, Wildian Wildian
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