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Afandy, Moh .
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Implementation of DC Motor Driver in Autoclave Reactor in Nickel Laterite Ore Processing Afandy, Moh .; Rianto, Muhammad Ikbal; Mubarak, Abdul Haris
Jambura Journal of Electrical and Electronics Engineering Vol 7, No 2 (2025): Juli - Desember 2025
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v7i2.31759

Abstract

This study aims to design and test a DC motor speed monitoring system in the process of stirring acid solution and Nickel Laterite ore in an Autoclave reactor tube. The control system uses a PWM (Pulse Width Modulation) signal with a constant duty cycle of 100% which is given to the MOSFET-based H-Bridge topology DC motor driver circuit. The determination of the duty cycle is based on the RPM rotation of the stirrer in the reactor tank with a multilevel test from 10% - 100%. Testing was carried out in two processing conditions, each with an acid concentration of 4% and 5%, to evaluate system performance against variations in viscosity load. The results of the study showed that the system was able to maintain the stability of the motor rotation speed in the nickel processing range with a leach solution content of 4% and 5% with an average speed of 193 RPM, even though there was an increase in load due to the concentration of the solution. The performance of the driver circuit proved effective in distributing power continuously without symptoms of overheating or switching interference, and was able to protect the system from the effects of reverse voltage. The mixing process showed homogeneous results with adequate stirring efficiency in both solution conditions. The final result in the form of filtrate liquid and residual residue is obtained from the process evaluation. The monitoring system and DC motor driver designed have shown reliable performance in laboratory-scale reactor stirring applications with a local monitor system, and have the potential to be further developed into an adaptive control system based on feedback sensors for energy efficiency and a remote monitoring and control system.Penelitian ini bertujuan untuk merancang serta menguji sistem monitoring kecepatan motor DC pada proses pengadukan larutan asam dan Nikel Laterite ore dalam tabung reaktor Autoclave. Sistem kontrol menggunakan sinyal PWM (Pulse Width Modulation) dengan dutycycle konstan sebesar 100% yang diberikan pada rangkaian driver motor DC  topologi H-Bridge berbasis MOSFET. Penentuan dutycycle didasarkan pada putaran RPM pengaduk pada tangka reactor dengan pengujian bertingkat dari 10 % - 100%. Pengujian dilakukan dalam dua kondisi proses pengolahan, masing-masing dengan konsentrasi asam 4% dan 5%, untuk mengevaluasi performa sistem terhadap variasi beban viskositas. Dari hasil penelitian menunjukkan bahwa sistem mampu mempertahankan kestabilan kecepatan putar motor dalam rentang pemprosesan nikel dengan kadar larutan pelindi 4% dan 5% dengan kecepatan rata-rata 193 RPM, meskipun terdapat peningkatan beban akibat konsentrasi larutan. Kinerja rangkaian driver terbukti efektif dalam mendistribusikan daya secara kontinu tanpa gejala overheat atau gangguan switching, serta mampu melindungi sistem dari efek tegangan balik. Proses pencampuran menunjukkan hasil homogen dengan efisiensi pengadukan yang memadai pada kedua kondisi larutan. Hasil akhir berupa cairan filtrate dan sisa residu diperoleh dari valuasi proses. Sistem monitoring dan driver motor DC yang dirancang telah menunjukkan performa andal dalam aplikasi pengadukan reaktor skala laboratorium dengan system local monitor, serta berpotensi dikembangkan lebih lanjut menuju sistem kontrol adaptif berbasis sensor umpan balik untuk efisiensi energi dan system monitoring dan control jarak jauh.
Bluetooth-based Heart Rate and Oxygen Saturation Monitoring System HC-05 Based on IoT Afandy, Moh .; Rianto, Muhammad Ikbal; Putra P, Muhammad Farhan
Jambura Journal of Electrical and Electronics Engineering Vol 7, No 1 (2025): Januari - Juni 2025
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v7i1.27447

Abstract

The purpose of this study was to design a heart rate and oxygen saturation measuring device using the reflectance method that is in accordance with standardized devices and connected to the application via a Bluetooth connection with a reporting system for measurement results that have abnormal heart performance. This study uses a design method with the use of the Max30100 sensor as the main component of this device. Based on the results of testing the sensor components of the device in testing the level of heart performance in the form of heart rate and oxygen saturation with the reflectance method in testing with a comparative device in the form of a fingertip pulse oximeter, an average error percentage of 1.73% and a measurement accuracy of 98.38% was obtained. Testing with a similar comparative device was carried out by the Smart Y68, an average error percentage of 1.73% and a measurement accuracy of 98.27%. As for testing the device with respondents, the results showed that 2/5 of the samples had a healthy heart performance level but required attention to their heart rate, namely samples A2 and A4. The design embedded a location reporting system from the use of the remote system application. The location tracking results obtained an error value of 0.002192% with an average percentage error in latitude of 0.0043% and an average percentage error in longitude of 0.000084%.Tujuan penelitian ini merancang alat pengukur detak jantung dan saturasi oksigen menggunakan metode reflectance yang sesuai dengan alat yang terstandarisasi dan terhubung pada aplikasi melalui koneksi bluetooth dengan adanya sistem pelaporan terhadap hasil pengukuran yang memiliki kinerja jantung yang abnormal. Penelitian ini menggunakan menggunakan metode rancang bangun dengan penggunaan sensor Max30100 sebagai komponen utama pada alat ini. Berdasarkan hasil pengujian komponen sensor alat dalam pengujian tingkat kinerja jantung berupa detak jantung dan saturasi oksigen dengan metode reflectance pada pengujian dengan alat pembanding berupa pulse oxymeter fingertip didapatkan rerata persentase error sebesar 1,73% dan akurasi pengukuran sebesar 98,38%. Pengujian dengan alat pembanding serupa dilakukan Smart Y68 didapatkan rata-rata persetanse error 1,73% dan akurasi pengukuran sebesar 98,27%. Adapun pengujian alat dengan responden didapatkan hasil bahwa dari 2/5 dari sampel memiliki tingkat kinerja jantung yang sehat tapi memerlukan perhatian pada detak jantung, yaitu sampel A2 dan A4. Dalam rancangan disematkan sematkan sistem pelaporan lokasi dari penggunaan aplikasi sistem jarak jauh. Hasil pelacakan lokasi didapatkan nilai error sebesar 0,002192% dengan rata-rata persentase error pada latitude sebesar 0,0043% dan rata-rata persentase error pada longitude sebesar 0,000084%. 
Co-Authors Mubarak, Abdul Haris Putra P, Muhammad Farhan Rianto, Muhammad Ikbal