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All Journal Physics Student Journal Jukung (Jurnal Teknik Lingkungan) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Pengabdian Magister Pendidikan IPA EIGEN MATHEMATICS JOURNAL Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Jurnal Pepadu Wahana Fisika : Jurnal Fisika dan Terapannya Indonesian Journal of Applied Science and Technology
Lalu Sahrul Hudha
Program Studi Fisika, FMIPA, Universitas Mataram
Religion Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Indonesian Journal of Applied Science and Technology

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Rancang Bangun Spin Coater Vakum Chuck Berbasis Mikrokontroler dengan Tuning PID Metode Ziegler-Nichols Septiawan, Bayu; Mardiana, Laili; Hudha, Lalu Sahrul
Indonesian Journal of Applied Science and Technology Vol. 6 No. 1 (2025): Edisi Januari-Juni 2025
Publisher : Indonesian

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Abstract

Spin coating is a thin-film deposition method that utilizes centrifugal force to produce uniform coatings; however, commercial instruments are expensive and therefore difficult to access for educational laboratories. This study aims to design and develop an ESP32-based spin coater equipped with a vacuum chuck system and motor speed control using a PID algorithm, with parameter tuning based on the Ziegler–Nichols method. The research methodology includes hardware and software design, component selection such as a brushed DC motor XD-3420, KY-003 Hall effect sensor, BTS7960 motor driver, and a vacuum system to hold the substrate. Performance testing was conducted through RPM sensor calibration, determination of optimal PWM frequency, and comparison between conventional control and PID control. The results show that the developed system is capable of reaching a maximum speed of 8500 rpm with a resolution of 0.1 rpm, linearity of 99.94%, and accuracy of 98.72% compared to a tachometer. The optimal operating frequency range of the system is 6000–8000 Hz with a sensitivity of 366.08 rpm/volt. PID control provides the best performance with a response time of 300 ms, an overshoot of 21.14%, and a steady-state error of 42.8 rpm. In conclusion, the proposed spin coater delivers precise and stable speed control, making it suitable for thin-film–based materials research in educational laboratories.
Application of Quality Control in Mobile Digital Radiography and Lead Apron Performance Testing Using CT Scan at West Nusa Tenggara Provincial General Hospital Putri , Baiq Alifa Kanaya; Septiawan, Bayu; Hudha, Lalu Sahrul
Indonesian Journal of Applied Science and Technology Vol. 7 No. 1 (2026): Edisi Januari-Juni 2026
Publisher : Indonesian

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The use of Mobile Digital Radiography (Mobile DR) in radiology services continues to rise due to its flexibility and efficiency; consequently, the implementation of Quality Control (QC) and regular evaluation of radiation protection equipment are necessary to ensure service quality and radiation safety. This study aims to evaluate the implementation of QC on Mobile DR equipment and to assess the suitability of lead aprons using CT scans at the Radiology Department of the NTB Provincial General Hospital. This is a quantitative descriptive study with the research subjects comprising one unit of mobile DR and 13 lead aprons. QC testing was conducted on the parameters of illumination, collimation, and X-ray beam alignment, while the apron suitability test was performed using a 64-slice CT scan to detect lead material leakage. The results showed that the illumination value was 198 lux, collimation was within tolerance limits, and beam alignment was 0°, meaning the Mobile DR unit was deemed to meet suitability standards. Furthermore, 5 out of 13 lead aprons (38.46%) exhibited leakage exceeding tolerance limits and were deemed unfit for use. These findings underscore the importance of implementing quality control (QC) and regular inspections of radiation protection equipment as part of the Quality Assurance programme to ensure the quality of radiology services and radiation safety at the NTB Provincial General Hospital.
Co-Authors Alfina Taurida Alaydrus Andini, Mira Arif Budianto Azhari, Mohammad Rasyidi Bayu Septiawan Bunawas Bunawas Bunawas Bunawas Devitanala, Titi Dian Wijaya Kurniawidi Didik Rahadi Santosa Ernita, Nevi Fajriyah, Putri Arifatul Hadi, Kasnawi Al Halil Akhyar Hiden I Wayan Sudiarta Intan Utami Jamiluddin, Jamiluddin Kurniawidi, Dian W. Kurniawidi, Dian Wijaya Laili Mardiana Lestari, Dwi Bayu M, I Wayan Ari Mardiana, Laili Marzuki Marzuki Marzuki Marzuki Masruroh MASRUROH Muhamad Ali Nur Khasanah Nur Khasanah Nurul Qomariyah Nurul Qomariyah NURUL QOMARIYAH Putraji, L.M. Guguh Putraji, Lalu M. Guguh Putri , Baiq Alifa Kanaya Rahadi Wirawan Ramadian Ridho Illahi Reza Alfian Rinarto Subroto Septiawan, Bayu Setyawan Purnomo Sakti Setyawan Sakti Suhayat Minardi Susi Rahayu Syamsuddin Syamsuddin Teguh Ardianto, Teguh Wirawan, Rahadi Wirawan, Rahadi