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All Journal Jurnal Edukasi Elektro Dinamik Transmisi: Jurnal Ilmiah Teknik Elektro Journal of Electrical Technology UMY Techne : Jurnal Ilmiah Elektroteknika Rang Teknik Journal Martabe : Jurnal Pengabdian Kepada Masyarakat Buletin Ilmiah Sarjana Teknik Elektro Jambura Journal of Electrical and Electronics Engineering Journal of Computer Networks, Architecture and High Performance Computing Journal of Electrical Engineering and Computer (JEECOM) JASEE Journal of Application and Science on Electrical Engineering JEEE-U (Journal of Electrical and Electronic Engineering-UMSIDA) JURNAL ILMIAH GLOBAL EDUCATION Indonesian Journal of Innovation Studies Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan Journal FORTEI-JEERI Jurnal Cakrawala Ilmiah Prosiding Seminar Nasional Teknik Elektro, Sistem Informasi, dan Teknik Informatika (SNESTIK) Prosiding Seminar Nasional Teknologi Industri Berkelanjutan PELS (Procedia of Engineering and Life Science) Journal for Technology and Science IJHCS Academia Open
Dwi Hadidjaja Rasjid Saputra
Program Studi Teknik Elektro, Universitas Muhammadiyah Sidoarjo
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health Social Sciences Other

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Journal : academia open

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Smart Shoe Care: Enhancing Drying Efficiency and Material Preservation: Perawatan Cerdas Sepatu: Meningkatkan Efisiensi Pengeringan dan Preservasi Material Dwi Hadidjaja; Akhmad Ahfas; Syamsudduha Syahrorini; Shazana Dhiya Ayuni
Academia Open Vol. 8 No. 1 (2023): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.8.2023.6117

Abstract

This scientific article presents a novel approach to address the challenges of shoe drying by developing a controlled shoe drying system. The system utilizes a NodeMCU ESP8266 microcontroller with internet connectivity, enabling monitoring and control of the drying process via a smartphone application. By integrating temperature and humidity sensors, the system optimizes the drying time and prevents damage to shoe materials, thus ensuring the preservation of their quality. The research objectives were to enhance drying efficiency, reduce drying time, and maintain the integrity of shoe materials. Experimental methods involved the design and implementation of the system, followed by rigorous testing and evaluation. The results demonstrated significant improvements compared to conventional shoe dryers, reducing drying time from 1-2 days to an efficient duration. The implications of this research are profound, as the developed system offers a sustainable solution to shoe drying, contributing to the preservation of shoe materials and reducing wastage. The findings have relevance for the global footwear industry, with potential applications in shoe care services and consumer households alike. Highlights: Efficient shoe drying: The developed controlled system optimizes the drying process, reducing the drying time significantly compared to conventional methods. Material preservation: The integrated temperature and humidity control prevents damage to shoe materials, ensuring their quality and longevity. Smart technology application: The use of NodeMCU ESP8266 microcontroller with internet connectivity enables remote monitoring and control of the shoe drying system, enhancing convenience and accessibility. Keywords: Shoe drying, Controlled system, Temperature and humidity control, Material preservation, Smart technology.
Innovative Document Sterilization: Ultraviolet-C and Heating Approach for Effective Pathogen Elimination: Sterilisasi Dokumen yang Inovatif: Pendekatan Ultraviolet-C dan Pemanasan untuk Penghapusan Patogen yang Efektif Akhmad Ahfas; Dwi Hadidjaja R.S; Agus Hayatal Falah
Academia Open Vol. 8 No. 1 (2023): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.8.2023.7159

Abstract

In the context of the widespread transmission of Covid-19 via various mediums, including physical contact and contaminated surfaces, the critical need for document sterilization becomes apparent. Addressing this concern, a Document Sterilization Box was developed utilizing Ultraviolet-C (UV-C) Light and Heating methods, integrated with an Arduino Uno system equipped with LCD, LED displays, and a Buzzer for remote monitoring. The study aimed to assess the efficacy of this approach, achieving successful results with an average Lux reading of 204.6 and a temperature of 31.9 ̊C, within a 2-minute timeframe and humidity of 111.3%. The Document Sterilization Box employing UV-C Light and Heating proved to be a highly effective, safe, and environmentally friendly method, eliminating 100% of harmful microorganisms without causing damage to the exposed objects. This innovation offers valuable implications for enhancing hygiene practices and safeguarding public health on a global scale. Highlight: Emerging Necessity: Recognizing the critical need for effective document sterilization due to Covid-19 transmission via various mediums, including contaminated surfaces and physical contact. Technological Innovation: Introducing a Document Sterilization Box incorporating Ultraviolet-C Light and Heating methods, enhanced by Arduino Uno system, LCD, LED displays, and remote monitoring capabilities. Efficacy and Implications: Successfully achieving high efficacy in eliminating harmful microorganisms, the UV-C Light and Heating approach offers a safe, eco-friendly solution with global implications for elevating hygiene standards and preserving public health. Keyword: COVID-19 Transmission, Document Sterilization, Ultraviolet-C Light, Heating Method, Arduino Uno System
Analysis of a Single-Phase Transformer Protection Control System Using a Microcontroller: Analisis Sistem Kontrol Proteksi Transformator Satu Fase Menggunakan Mikrokontroler Dwi Hadidjaja R.S.; Adriana Anteng Anggorowati; Dewi Handayani U.N
Academia Open Vol. 10 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.10.2025.12990

Abstract

General Background: Single-phase distribution transformers frequently experience overcurrent, overvoltage, and thermal stress, which account for a significant portion of operational failures in low-voltage networks. Specific Background: Conventional thermal–electromechanical relays exhibit slow response times (150–300 ms) and lack real-time multi-parameter monitoring, limiting their ability to prevent insulation degradation under rapidly fluctuating loads. Knowledge Gap: Prior microcontroller-based protection studies rarely provide quantitative benchmarking against conventional relays, lack integrated current–voltage–temperature sensing, and often omit controlled fault-injection experiments for latency validation. Aims: This study aims to develop and evaluate a microcontroller-based protection system using calibrated ACS712, ZMPT101B, and NTC sensors with real-time decision logic to reduce fault-detection latency and improve protection reliability. Results: Experimental testing on single-phase transformer fault-injection scenarios demonstrated detection latencies of 84 ms (overcurrent), 96 ms (overvoltage), and 112 ms (thermal), with sensor errors below 2.4%, a 98.1% trip success rate, and only 1.3% false positives across 50 cycles. Novelty: The system integrates low-error multi-parameter sensing with sub-120-ms response and provides the first quantitative benchmark showing performance improvements over conventional relays. Implications: Findings confirm that optimized low-cost microcontroller platforms can serve as scalable, accurate, and time-efficient protection solutions for distribution transformers, supporting future development of intelligent protection systems. Highlights: Sub-120 ms fault-detection latency significantly outperforms conventional relays. Multi-parameter sensing (current–voltage–temperature) enhances reliability and reduces missed trips. Low-cost microcontroller platform provides a scalable and accurate protection alternative for distribution systems. Keywords: Fault Detection, Microcontroller-Based Protection, Thermal Monitoring, Transformer Protection System, Overcurrent–Overvoltage
Component Tolerance and Performance of 2-Way Passive Crossovers: Toleransi Komponen dan Kinerja Penyeberang Pasif Dua Arah Akhmad Ahfas; Adriana Anteng Anggorowati; Dwi Hadidjaja R.S.
Academia Open Vol. 10 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.10.2025.12997

Abstract

General Background: Passive 2-way crossover filters play a crucial role in dividing audio signals between woofer and tweeter channels, where their performance is highly dependent on the precision of passive components. Specific Background: Variations in capacitor and inductor values, along with their tolerances, can significantly alter crossover frequency, phase characteristics, and harmonic distortion, yet these effects are not fully quantified in practical implementations. Knowledge Gap: Limited studies provide an integrated empirical–analytical assessment of how component deviations influence frequency response, THD, and impedance stability in real passive 2-way filters. Aims: This study evaluates the influence of component tolerances on crossover frequency accuracy, filter slope behavior, phase stability, and distortion performance. Results: Experimental findings show that ±10–15% component deviations shift crossover frequency by 7.1–8.5%, reduce filter slope by 2.1–3.2 dB/octave, increase THD from 0.8% to 3.2% at 10W, and induce impedance fluctuations that shift the crossover point by an additional 3.2%. Inductors exhibit higher sensitivity (0.72–0.78) than capacitors (0.45–0.52). Novelty: This study provides a combined simulation–measurement analysis linking component tolerance to measurable acoustic deviations. Implications: The results highlight the need for ≤5% tolerance components and pre-assembly verification to ensure stable crossover performance. Highlights: Component tolerances significantly shift crossover frequency and reduce filter accuracy. Inductors have a stronger impact on system performance than capacitors. Using ≤5% tolerance components improves stability, distortion, and overall audio quality. Keywords: Passive Crossover Filter, Component Tolerance, Crossover Frequency Shift, Total Harmonic Distortion, Impedance Stability
Co-Authors A. Ahfas Adriana Anteng Anggorowati Afif Dimyati Agus Hayatal Falah Ahmad Ahfas Ahmad Ahfas, Ahmad Akbar, Ilham Yusuf Akhmad Ahfas Alamsha, Mukhammad Ariya Anggraeni, Aprilia Putri Arief Wisaksono Ashar, Abdul Adim Bima Setya Kusumaraga Budi, Mohamad Istiyo Dewi Handayani U.N Dharma EP Dharmawan, Achmad Boby Adi Diva Sandy Abhiseka Ramadhan Dwiki Maulana Rizaldi Erwin Hari Nugroho Falah, Agus Indah Sulistiyowati Izza Anshory Jainul, M Jamaaluddin Mardiyono Mardiyono Marhanif Choirunnisa Nurma Moh. Muzakki Firmansyah Mohammad Bahrul Ulum Mohammad Idris Andriansyah Muhammad Alamsyah Muhammad Firhand Setiaky Muhammad Irsyad Hidayatullah Muhammad Sofyan Muhammad Ulum Nanggala, Dikas Pandu Pamungkas, Farid Setyo Phalah, Surya Mahendra Pramana, Joko Prayudha, Mufit Yogie Putra, Mochamad Wildan Karyono Rahmad Yanuar Arianto Rohman, Rizky Habibur Sarwan Hamid Shazana Dhiya Ayuni Syahrorini, Syamsudduha Taufik Marzuki Velly Descovvy Hardiyanto Zaenal, Ali