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All Journal Dinamik Rekayasa Mesin Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Artificial Intelligence and Data Mining JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Techne : Jurnal Ilmiah Elektroteknika MATAPPA: Jurnal Pengabdian Kepada Masyarakat Digital Zone: Jurnal Teknologi Informasi dan Komunikasi Buletin Ilmiah Sarjana Teknik Elektro MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Academia Open Journal of Computer Networks, Architecture and High Performance Computing Journal of Electrical Engineering and Computer (JEECOM) JEEE-U (Journal of Electrical and Electronic Engineering-UMSIDA) Indonesian Journal of Innovation Studies Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan PELS (Procedia of Engineering and Life Science) Procedia of Social Sciences and Humanities Journal of Empowerment and Community Service Journal of Social Comunity Services
Ahmad Ahfas
Universitas Muhammadiyah Sidoarjo
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Sistem Keamanan Sangkar Burung Berbasis Citra dengan Notifikasi Telegram Aryanto, Dedy; Ayuni, Shazana Dhiya; Ahfas, Akhmad; Falah, Agus Hayatal
Journal of Electrical Engineering and Computer (JEECOM) Vol 6, No 2 (2024)
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/jeecom.v6i2.9306

Abstract

Keamanan properti menjadi salah satu aspek penting dalam kehidupan sehari-hari, termasuk dalam konteks perlindungan hewan peliharaan seperti burung. Burung, terutama yang bernilai tinggi atau langka, seringkali menjadi target pencurian. Oleh karena itu, diperlukan sistem keamanan yang efektif untuk melindungi burung peliharaan dari ancaman tersebut. Sistem keamanan tradisional umumnya mengandalkan metode seperti kunci fisik dan pengawasan manual, yang seringkali tidak cukup efektif dalam mencegah pencurian atau merespon ancaman secara real-time. Oleh karena itu, integrasi teknologi modern dalam sistem keamanan menjadi sangat penting. Salah satu teknologi yang dapat diandalkan adalah kamera berbasis IoT yang dapat memantau dan mengirimkan informasi secara langsung kepada pemilik melalui aplikasi pesan instan seperti Telegram. Baterai sebagai catu daya untuk semua komponen dalam dalam rangkaian dengan tegangan +5 volt. Untuk memonitoring sangkar burung, sensor PIR akan mendeteksi pergerakan melalui radiasi inframerah yang dipancarkan oleh tubuh manusia ataupun objek yang bergerak dan diwaktu yang bersamaan kamera dari ESP32-CAM melakukan pengambilan gambar lalu dikirim ke mikrokontroller ESP32-CAM, kemudian gambar akan dikirim ke Telegram dan mengirim notifikasi ke smartphone. Dan dapat  disimpulkan jika alat yang peneliti jabarkan berfungsi dengan baik dan sebagaimana dengan fungsi dan tujuan alat tersebut dibuat. Hal itu dibuktikan dengan bot aplikasi telegram yang berhasil terhubung dengan sistem dan menampilkan kondisi sekitar sangkar burung yang dijadikan obyek pada penelitian kali ini. System pada alat tersebut juga dapat  beroprasi dengan baik mesikpun dengan jarak yang jauh.
Leakage Warning System and Monitoring Lapindo Sidoarjo Mud Embankment Based on Internet of Things Haji, Shon; Ahfas, Akhmad; Syahrorini, Syamsudduha; Ayuni, Shazana Dhiya
Indonesian Journal of Artificial Intelligence and Data Mining Vol 7, No 1 (2024): March 2024
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/ijaidm.v7i1.25269

Abstract

The emergence of the Lapindo Sidoarjo mudflow has a long history since 29 May 2006. The point of the mudflow is in Siring Village, and until now, it has shown no signs of stopping. Sidoarjo residents are still fearful of the impact and recurrence of the mudflow, especially those still living around the embankment. The real impact is often still felt, such as embankment leaks, embankment collapses, or overflowing water mixed with mud during high rainfall, making people who still live around the embankment anxious. The unavailability of monitoring information to the public and the unclear mitigation system makes it necessary to have an information system that is easily accessible to the public. Therefore, by utilizing the advances in Internet of Things technology, this research will design a prototype system to monitor the conditions around Lapindo Sidoarjo Mud using Telegram Bot as a user interface, the ESP32-Cam microcontroller board, SW-420 vibration sensor, and MPU-6050 accelerometer sensor. The result of testing this prototype tool is that the Telegram user will receive a notification if the condition of the prototype field is experiencing vibrations or changes in position. Other than that, the Telegram user can also request real-time information, such as temperature, the axis position of the prototype as an initial benchmark, and the current photo to know the condition of the Lapindo Sidoarjo mud embankment. That way, it is hoped that this prototype system will become a monitoring and mitigation solution for the local people and the general public who reach this Telegram Bot room chat.
Design Product Counting and Sorting Tools Using Esp8266-Based Volumenization Marzuki, Taufik; Ahfas, Akhmad; R.S, Dwi Hadidjaja; Anshory, Izza
Journal of Computer Networks, Architecture and High Performance Computing Vol. 5 No. 2 (2023): Article Research Volume 5 Issue 2, July 2023
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/cnahpc.v5i2.2879

Abstract

Indonesia is a large country, so it does not rule out the possibility of natural resources owned by Indonesia such as natural resources coal, petroleum, gas, nickel and many others When we enter the industrial world, especially placed in the production process area, more precisely the process of sorting goods, it is very necessary to optimize the performance and results of the effectiveness of these working hours so as to get high performance efficiency and will get maximum yield. In the shipping section there are several occurrences of problems which include three main activities of the process of receiving, storing and sending when receiving or sending. We recommend reducing errors at the time of delivery of goods. As for the problem of empty packaging and calculating the number of inappropriate products, by providing solutions using loadcell sensors for weight, proximity sensors for automatic counters and using google sheets as data storage in real time using esp8266 as a controller module.causing performance effectiveness that is expected to be better automatically and using the sophistication of IoT systems connected to the web system.and supported by several Components include relays, pneumatics, googlesheets in order to get accurate results, product sorting tools using this loadcell will be compared with loadcell weighing devices that have been on the market in order to find out how accurately it has obtained the appropriate results using a volume of 103gr. The results of the entire test tool get accurate data ranging from googlesheet to reading through Lcd 20x4 testing is carried out five times so that this tool can be applied to other supporting tools.that the entire tool is able to answer the problems of the developing industrial world.
Prototype Of Moisture Content Meter In Grain Using Esp32 Based On Spreadsheet Ramadhan, Mochammad Derian; Wisaksono, Arief; Jamaaluddin, Jamaaluddin; Ahfas, Akhmad
Journal of Computer Networks, Architecture and High Performance Computing Vol. 6 No. 2 (2024): Articles Research Volume 6 Issue 2, April 2024
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/cnahpc.v6i2.3530

Abstract

In the process period after the rice is harvested, the rice is then separated from the stalk and referred to as grain which will then be dried. The dried grain aims to reduce the water content, in measuring the water content of the grain, an effective and efficient measurement and database storage tool is needed for users to find out which grain is suitable for processing and can determine the quality of the water content of the grain. The method used in this research uses the RnD (Research And Development) method. In this test using capacitive soil moisture sensor and using database storage in the form of google spreadsheet. The capacitive soil moisture sensor is also calibrated with conventional measuring instruments (Grain Moisture Meter) to find out whether the sensor works properly and accurately. The results in this test found that all components are able to work properly and show an error value <1, the sample reading data will be sent to the database on google spreadsheet so that users can find out the data records in real time and detail.
Design and Build Integrated Water Filter Automation for Android Smartphones (IoT): Rancang Bangun Otomasi Filter Air Terintegrasi Smartphone Android (IoT) Septiyan, Moch. Dani; Anshory, Izza; Ahfas, Akhmad; Jamaaluddin, Jamaaluddin
Indonesian Journal of Innovation Studies Vol. 14 (2021): April
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.414 KB) | DOI: 10.21070/ijins.v14i.538

Abstract

In the internet of things, one of the current developments is smartphone-based water automation which makes it easier for users to control water. The working principle of this research is the water contained in the water storage tank if the water level is below 25 cm then the water pump (water input) will be active until the water is above 25 cm. Then the solenoid valve (water output) can be opened and closed via the Blynk application. When the solenoid is opened, the water in the holding tank will pass through filters 1 and 2 into the filter reservoir. The water in the filtered reservoir will measure the level of acidity and turbidity and then display it on the Blynk application. The results of this study, the water filter can reduce the level of turbidity of water by 0.568 NTU and increase the level of acidity by 0.132. The PH sensor used has an accuracy rate of 93.53%. The Turbidity sensor or turbidity has an average of 1.00 NTU in measuring clean water (Aqua).
Component Tolerance and Performance of 2-Way Passive Crossovers: Toleransi Komponen dan Kinerja Penyeberang Pasif Dua Arah Ahfas, Akhmad; Anggorowati, Adriana Anteng; R.S., Dwi Hadidjaja
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
IMPLEMENTASI SISTEM SMART DOORLOCK KOST BERBASIS ESP32 DENGAN DETEKSI STATUS TAGIHAN MENGGUNAKAN LOGISTIC REGRESSION DAN MONITORING APLIKASI MOBILE Virmansah, Riski; Sulistiyowati, Indah; Jamaaluddin, Jamaaluddin; Ahfas, Akhmad
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.
Computer-Aided Design (CAD) Training for Appropriate Technology (TTG) to Enhance the Competence of Vocational High School Students in East Java Mulyadi; Widodo, Edi; Fahruddin, A'rasy; Ahfas, Akhmad
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.
Co-Authors Ade Efiyanti Adriana Anteng Anggorowati Agus Hayatal Falah Ahmad Rifandi Aji, Eka Afdi Septiyono Ananda, Safira Dea Arena, Ghinnata Alsyah Arief Wisaksono Aryanto, Dedy Ayu Eryani, Rambu Dewi Handayani Untari Ningsih Dwi Hadidjaja Edi Widodo, Edi Fahruddin, A'rasy Fajar Rafli Falah, Agus Faris, Faisal Haikal, Hikam Haji, Shon Hani Setyaputri, Nabila Hayatal Falah, Agus Hidayah, Nabilah Lailiyatul Hindarto Indah Sulistiyowati Indah Sulistyowati, Indah Izza Anshory Jamaaluddin Marzuki, Taufik Mohammad Amar Juliyanto Muhammad Alamsyah MULYADI Mulyadi Mulyadi Nanggala, Dikas Pandu Putra, Wijaya Al Hadad Sudjono R.S, Dwi Hadidjaja R.S, R. Dwi Hadidjaja R.S., Dwi Hadidjaja Rachmadira Putri, Kania Rachmat Firdaus Ramadhan, Hanif Ramadhan, Mochammad Derian Septiyan, Moch. Dani Shazana Dhiya Ayuni Surya Mahendra Syahrorini, Syamsudduha Tirta, Ivan Danu Vicky Saifudin N, Muhamad Virmansah, Riski Zaenal, Ali