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All Journal Dinamik Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Journal of Computer Networks, Architecture and High Performance Computing Journal of Electrical Engineering and Computer (JEECOM) Indonesian Journal of Innovation Studies Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan Jurnal Cakrawala Ilmiah PELS (Procedia of Engineering and Life Science) Proceedings of The ICECRS Malcom: Indonesian Journal of Machine Learning and Computer Science Media Bina Ilmiah Journal for Technology and Science Academia Open
Akhmad Ahfas
Program Studi Teknik Elektro, Universitas Muhammadiyah Sidoarjo, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Blind Spot Detection System for Phinisi Ship Navigation Safety: Sistem Deteksi Titik Buta untuk Keselamatan Navigasi Kapal Phinisi Hanifah Burhanuddin; Akhmad Ahfas
Indonesian Journal of Innovation Studies Vol. 27 No. 1 (2026): January
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v27i1.2076

Abstract

General Background Maritime tourism development increases the use of large vessels such as phinisi cruise ships which have operational safety challenges. Specific Background The large structure of phinisi ships creates blind spots that can lead to potential collisions with smaller vessels. Knowledge Gap Existing navigation systems have limited capability in detecting objects within blind spot areas in real-time. Aims This study aims to design and implement a blind spot sensing alert system using a laser distance sensor based on Arduino Uno. Results The developed system is capable of detecting object presence within blind spot areas and providing warning signals to assist navigation awareness. Novelty The integration of laser distance sensing with a simple microcontroller-based system provides a practical solution for blind spot monitoring on traditional vessels. Implications This system can support maritime safety by reducing collision risk and can be further developed for wider implementation in similar ship types. Keywords: Blind Spot Detection, Phinisi Ship, Laser Distance Sensor, Arduino Uno, Maritime Safety Key Findings Highlights System identifies object presence in blind navigation areas Warning mechanism supports real-time operator awareness Prototype demonstrates practical implementation on traditional vessel
IoT Based UV C Baby Equipment Sterilization System With Sensor Monitoring: Sistem Sterilisasi Peralatan Bayi Berbasis IoT dengan Sinar UV-C dan Pemantauan Sensor Muhammad Riko; Akhmad Ahfas
Indonesian Journal of Innovation Studies Vol. 27 No. 1 (2026): January
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v27i1.2079

Abstract

General Background: Hygiene of baby feeding equipment is essential due to infants’ low immunity and high risk of bacterial contamination. Specific Background: Conventional cleaning and drying methods are often ineffective and less hygienic, while existing sterilization systems lack integrated remote monitoring. Knowledge Gap: Previous studies have not fully integrated UV-C sterilization, heating-based drying, and Internet of Things control in a single system. Aims: This study aims to develop an IoT-based UV-C sterilization device using ESP32 to monitor and control sterilization and drying processes. Results: The drying system reduced moisture to a completely dry state, while sterilization testing showed bacterial counts below SNI thresholds. The IoT system operated up to 60.2 km with an average delay of 4.86 seconds, and the DS18B20 sensor achieved an average error of 0.25°C. Novelty: The integration of UV-C sterilization, heating drying, and long-distance IoT control with real-time monitoring represents the main contribution. Implications: This system provides a practical and hygienic solution for maintaining baby equipment cleanliness with reliable remote operation Keywords: Uv C Sterilization, Internet of Things, Esp32, Baby Equipment, Temperature Sensor Key Findings Highlights Drying process achieves complete moisture removal after extended duration Bacterial testing confirms compliance with microbiological safety standards Remote operation remains stable across multiple long-distance locations
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
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
Motorcycle Tilt Warning Sensor Using Arduino and SCA60C: Sensor Peringatan Kemiringan Sepeda Motor Menggunakan Arduino dan SCA60C Annuur Sulaeman Iman; Akhmad Ahfas, ST., M.Kom
Indonesian Journal of Innovation Studies Vol. 26 No. 1 (2025): January
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i1.2165

Abstract

General Background: Traffic accidents involving two-wheeled motor vehicles remain a major concern in road safety due to the limited safety systems available on motorcycles. Specific Background: Sharp turns and excessive vehicle tilt angles during maneuvering can increase the risk of losing control while riding. Knowledge Gap: Existing motorcycle safety studies have discussed accident prevention systems, yet practical tilt warning devices using real-time tilt detection for rider awareness are still limited. Aims: This study aimed to design and develop a motorcycle tilt warning sensor device using an Arduino Nano and Axis Module SCA60C to provide early warnings during hazardous riding conditions. Results: The developed system successfully detected motorcycle tilt angles and activated LED and buzzer warnings at predetermined tilt ranges of 10°–45° and 145°–170°. Testing results showed differences between manual sensor measurements and motorcycle-mounted measurements ranging from 1°–20° on the left side and 1°–15° on the right side due to variations in the vehicle’s pivot point. Novelty: This research presents a tilt warning system integrating the SCA60C sensor with Arduino-based notification outputs specifically designed for motorcycle maneuver monitoring. Implications: The proposed device can support rider awareness during cornering and may contribute to reducing motorcycle accident risks through early tilt angle warnings.Highlights: Real-time angle detection activated visual and audio alerts during hazardous maneuvers. Mounted measurements produced calibration differences caused by motorcycle pivot positioning. Integrated microcontroller architecture supported continuous monitoring during cornering. Keywords: Arduino Nano; Motorcycle Safety; Tilt Warning Sensor; SCA60C Sensor; Traffic Accident Prevention
Arduino Based Automated Shoe Cabinet Door System: Sistem Pintu Lemari Sepatu Otomatis Berbasis Arduino Moh Fakhri Hibatulloh; Akhmad Ahfas
Indonesian Journal of Innovation Studies Vol. 26 No. 2 (2025): April
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i2.2177

Abstract

General Background: Home automation technology is increasingly utilized to support efficiency and convenience in daily activities through the integration of sensors, controllers, and actuators. Specific Background: Automatic door systems have been implemented in various applications, while the adoption of microcontroller-based automation for shoe cabinet access remains limited. Knowledge Gap: Previous studies mainly focused on automatic doors for buildings and access systems, with limited attention given to automated shoe cabinet door mechanisms using ultrasonic sensing and Arduino-based control. Aims: This study aimed to design and develop an Arduino Uno based automation system for opening and closing a shoe cabinet door using ultrasonic sensors as detection components and a servo motor as the driving mechanism. Results: The developed system successfully detected objects at predetermined distances, activated the servo motor to open the cabinet door at approximately 50 cm, and operated the blower through a relay when an object was detected at approximately 10 cm. Testing showed that the ultrasonic sensors, servo motor, and relay operated according to the programmed functions. Novelty: The proposed design applies ultrasonic sensor based automation and Arduino Uno control to a shoe cabinet door system integrated with a blower activation mechanism. Implications: The system demonstrates a practical application of microcontroller-based automation for household furniture, providing a simple approach for automated cabinet access and operation.Highlights: Object detection at approximately 50 cm triggered cabinet access through servo actuation. Distance sensing at approximately 10 cm activated blower operation via relay switching. Integrated hardware components functioned according to programmed control logic during testing. Keywords: Arduino Uno; Ultrasonic Sensor; Home Automation; Servo Motor; Automatic Cabinet Door
SINTESIS KONTROL TSUKAMOTO-PID ADAPTIF PADA PENGERINGAN KUPANG Dwi Hadidjaja; Akhmad Ahfas; Agus Hayatal Falah
Dinamik Vol 31 No 2 (2026)
Publisher : Universitas Stikubank

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35315/dinamik.v31i2.10453

Abstract

Traditional clam drying often suffers from energy inefficiency and inconsistent product quality due to manual temperature control that is unable to respond to dynamic environmental changes. This study proposes an adaptive hybrid control system integrating Fuzzy Tsukamoto and PID to enhance thermal stability and drying performance. Temperature and humidity were monitored in real time using a DHT22 sensor, while fuzzy inference and a self-tuning PID mechanism automatically adjusted control parameters. Performance was evaluated through error metrics, temperature stability, drying rate, and statistical validation. The system improved thermal efficiency to 85.2%, reduced Integral Absolute Error by 41.3%, decreased drying time by 22 minutes per cycle, and lowered overshoot by 87.3%. The optimal operating window occurred between 11:00–12:00 with a minimal error of 0.5 °C and a fuzzy output of 64.3, indicating a medium–fast drying rate. Temperature stability of ±0.8 °C results in a more uniform distribution of water content, texture and color, thereby increasing the selling value of the product. These findings demonstrate the strong potential of applying adaptive Tsukamoto–PID control to the seafood-based drying industry to improve process efficiency and quality consistency.
Computer-Aided Design (CAD) Training for Appropriate Technology (TTG) to Enhance the Competence of Vocational High School Students in East Java Mulyadi; Edi Widodo; A'rasy Fahruddin; Akhmad Ahfas
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 10 No. 2 (2025): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v10i2.22448

Abstract

This community service programme aimed to enhance the competencies of vocational high school students in East Java through Computer-Aided Design (CAD) training for Appropriate Technology (AT). Held on 13 June 2025 at the Mechanical Engineering Study Programme, Universitas Muhammadiyah Sidoarjo (Umsida), the activity was part of the Institutional Community Service Grant initiative. A total of 20 students from four partner schools participated, with each school sending five representatives. The training focused on developing students’ technical skills in designing AT products using CAD software and simulating basic fluid mechanics relevant to product development. Expert instructors, certified by the National Professional Certification Board (BNSP), delivered hands-on sessions to ensure strong practical learning outcomes. The results showed significant improvements in students’ technical abilities in CAD-based product design, a better understanding of engineering concepts, and greater readiness to apply these skills in industry-related contexts. This programme represents a strategic effort to bridge the gap between vocational school graduates’ competencies and industry demands, while also fostering innovation and the potential for technology-based entrepreneurship.
IMPLEMENTASI SISTEM SMART DOORLOCK KOST BERBASIS ESP32 DENGAN DETEKSI STATUS TAGIHAN MENGGUNAKAN LOGISTIC REGRESSION DAN MONITORING APLIKASI MOBILE Riski Virmansah; Indah Sulistiyowati; Jamaaluddin Jamaaluddin; Akhmad Ahfas
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1174

Abstract

The management of boarding houses (kost) is not only related to providing residential facilities, but also involves administrative payment management and access security for tenants. Common problems that frequently occur include late payment of rental fees and the use of conventional door locks, which are vulnerable to misuse such as key duplication and unauthorized access. These conditions make it difficult for boarding house owners to monitor payments and room access effectively and in real time. Therefore, this study aims to design and implement an ESP32-based smart boarding house door lock system integrated with RFID, Firebase, and a mobile application, complemented by billing status detection using the Logistic Regression algorithm. The system operates by reading the tenant’s RFID card as an access identifier. The tenant’s identity data is then verified through the Firebase database to determine the payment status. Door access is granted only to tenants with a confirmed paid status, while tenants with outstanding payments are automatically restricted from accessing the room. The Logistic Regression algorithm is applied to predict payment status based on historical payment data, such as the duration of arrears and the frequency of on-time payments. The research method used in this study is Research and Development (R&D), which includes problem identification, literature study, hardware and software design, system testing, and result analysis. The expected outcome of this research is to enhance room access security, simplify real-time payment monitoring for boarding house owners through a mobile application, and create a more efficient, practical, and integrated boarding house management system based on Internet of Things technology.
Co-Authors A'rasy Fahruddin Adriana Anteng Anggorowati Afif Hidayatur Rohman Agus Hayatal Falah Ahmad Danil Rizal Pahlefi Arif A Alamur Rosidil Wafa Amar Rasuli Andri, Dwi Andriyanto Annuur Sulaeman Iman Arief Wisaksono Arifin , Muhammad Zainul Diva Sandy Abhiseka Ramadhan Donny Wiraputra Dwi Hadidjaja Rasjid Saputra Dwiki Maulana Rizaldi Edi Widodo Firdasari , Aulia Vivi Guyub Rahman Auwali Hanifah Burhanuddin Hidayati, Nisfullaili Indah Sulistiyowati Ivan Danu Tirta Izza Anshory Jamaaluddin Maulana , Mochamad Rizal Moch. Azriel Revanza Mochamad Hasyim Mochammad Derian Ramadhan Moh Fakhri Hibatulloh Moh. Muzakki Firmansyah Muhammad Drajad Kuncoro Aji Muhammad Riko Muhammad Syaiful Azis Mulyadi Mulyadi Najwa , Fauziatun Rakhmad Fajar Ashari Riski Virmansah Shazana Dhiya Ayuni Syahrorini, Syamsudduha Taufik Marzuki Wijaya Al Hadad Sudjono Putra