Articles
<![CDATA[Pelatihan Menggunakan Water Chiller Modifikasi Outdoor AC Split Berkapasitas 1 kW ]]>
<![CDATA[Roza, Indra]]>;
<![CDATA[Siregar, Lisa Adriana]]>;
<![CDATA[Ananda, Yussa]]>;
<![CDATA[Nasution, Agus Almi]]>
<![CDATA[ Prioritas: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 01 (2025): EDISI MARET 2025 ]]>
Publisher : <![CDATA[Universitas Harapan Medan ]]>
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DOI: 10.35447/prioritas.v7i01.994
<![CDATA[Pengabdian masyarakat ini bertujuan untuk melaksanakan pelatihan penggunaan water chiller hasil modifikasi dari unit outdoor AC split berkapasitas 1 kW di Kelurahan Belawan Bahari, Kecamatan Medan Belawan, Medan, Sumatra Utara. Pelatihan ini dirancang untuk meningkatkan pengetahuan dan keterampilan masyarakat setempat dalam menggunakan teknologi pendinginan yang efisien dan terjangkau untuk berbagai aplikasi, termasuk penyimpanan makanan, pengolahan bahan, dan pendinginan ruangan. Water chiller yang dimodifikasi ini merupakan hasil inovasi dari unit AC split konvensional, yang telah disesuaikan untuk mengalirkan air dingin dengan efisiensi yang optimal. Pelatihan melibatkan sesi teori dan praktik, di mana peserta mempelajari cara kerja water chiller, instalasi, serta perawatan dan pemeliharaan sistem. Selain itu, peserta juga diberikan informasi mengenai manfaat teknologi ini dalam meningkatkan kualitas hidup sehari-hari dan efisiensi energi. Hasil dari pelatihan menunjukkan bahwa peserta memahami dan dapat menerapkan teknik penggunaan water chiller dengan baik. Dengan pemahaman ini, diharapkan masyarakat dapat memanfaatkan teknologi pendinginan secara efektif untuk keperluan mereka, yang pada akhirnya akan berkontribusi pada peningkatan kualitas hidup dan efisiensi biaya dalam kegiatan sehari-hari mereka. Pengabdian masyarakat ini bertujuan untuk memberdayakan masyarakat melalui teknologi yang inovatif dan relevan dengan kebutuhan lokal mereka.]]>
<![CDATA[Tongkat Tunanetra Menggunakan Sensor Ultrasonik dan GPS Berbasis Mikrokontroler ]]>
<![CDATA[Gunawan, Fikri]]>;
<![CDATA[Roza, Indra]]>;
<![CDATA[Siregar, Lisa Adriana]]>
<![CDATA[ JiTEKH Vol. 13 No. 1 (2025): March 2025 ]]>
Publisher : <![CDATA[Universitas Harapan Medan ]]>
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DOI: 10.35447/jitekh.v13i1.1008
<![CDATA[Conventional blind canes have limitations in providing accurate information about the user's environmental conditions, especially in recognizing obstacles and determining location. Therefore, this study aims to design and build a smart blind cane equipped with ultrasonic sensors and a microcontroller-based GPS system. This cane is designed to help blind users detect obstacles around them and determine their location more independently. The main system of this cane consists of an ultrasonic sensor to detect the distance of obstacles in front of the user and a GPS module to track the user's location. Data from the sensors and GPS are processed by a microcontroller, which then provides feedback to the user through vibrations and sounds. When an obstacle is detected within a certain distance, vibrations will be activated to provide a warning, while location information can be accessed through an application or other supporting devices. The test results show that this blind cane has a high level of accuracy in detecting obstacles up to a distance of 2 meters and fairly good positioning accuracy with an integrated GPS system. This cane can improve the mobility and sense of security of users in different environments. Thus, this design makes a positive contribution to assistive technology for the blind, enabling them to be more independent in their daily activities.]]>
<![CDATA[Prototype Robot Pemadam Api Otomatis Berbasis Arduino dengan Sensor Api dan Kamera ]]>
<![CDATA[Dermawan, Tengku Mhd Aidil]]>;
<![CDATA[Roza, Indra]]>;
<![CDATA[Siregar, Lisa Adriana]]>
<![CDATA[ JiTEKH Vol. 13 No. 1 (2025): March 2025 ]]>
Publisher : <![CDATA[Universitas Harapan Medan ]]>
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DOI: 10.35447/jitekh.v13i1.1009
<![CDATA[Fire is one of the events that can cause major impacts, ranging from material losses to life safety risks. To overcome this, technology is needed that can detect and extinguish fires quickly, especially in areas that are difficult to reach or too dangerous for humans. This study aims to design and develop a prototype of an Arduino-based automatic fire extinguishing robot equipped with a fire sensor and camera. The fire sensor is used to detect the presence of a fire source, while the camera functions as a visual support tool that helps the robot navigate and identify the position of the fire more accurately. This robot is designed to be able to move independently to the fire point after successful detection. Once close enough, the robot will activate the extinguishing mechanism to put out the fire. This prototype was tested in various environmental scenarios and varying fire intensities to measure the level of detection accuracy, response speed, and effectiveness in the extinguishing process. The test results show that the robot is able to detect and extinguish small-scale fires with a high success rate. Although there are still some limitations in terms of speed and detection distance, this prototype shows great potential as a supporting technology for fire extinguishing, especially for high-risk areas. With further development, it is hoped that this robot can function as a supporting device in handling small-scale fires and as a solution to maintain human safety from direct exposure to fire risks.]]>
<![CDATA[Application of the adaptive neuro-fuzzy inference system for prediction of the electrical energy production in Jakarta ]]>
<![CDATA[Nugraha, Yoga Tri]]>;
<![CDATA[Cahyadi, Catra Indra]]>;
<![CDATA[Rida, Rizkha]]>;
<![CDATA[Ningsih, Margie Subahagia]]>;
<![CDATA[Sholeha, Dewi]]>;
<![CDATA[Roza, Indra]]>
<![CDATA[ IAES International Journal of Artificial Intelligence (IJ-AI) Vol 14, No 3: June 2025 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijai.v14.i3.pp1790-1798
<![CDATA[Jakarta, as a rapidly growing urban area, faces challenges in balancing energy demand with supply while addressing environmental concerns associated with traditional energy sources. Electrical energy production prediction in urban environments like Jakarta is crucial for effective energy management, ensuring stable supply, and promoting sustainable development. The prediction of electrical energy production in Jakarta is critical for ensuring stable and sustainable energy supply. This research proposed the application of the adaptive neuro-fuzzy inference system (ANFIS) as a predictive tool specifically tailored for Jakarta's energy production prediction context. The research methodology used in this study is the ANFIS. Five levels make up the architecture of the ANFIS model: output, normalization, defuzzification, rule evaluation, and fuzzification. The fuzzification layer converts input variables into linguistic terms using membership functions, while the rule evaluation layer calculates the activation strength of each rule based on the input values. The predicted results of Jakarta electrical energy production from 2023 to 2028 are 65,288 GWh and there is an annual increase of 5.25%. The error contained in ANFIS is with a root mean square error (RMSE) value of 0.0001058% and a mean absolute percentage error (MAPE) value of 0.00875%.]]>
<![CDATA[Unit Pengendali Sistem Hibrida Panel Surya Dengan PLN Pada Penggunaan Rumah Tinggal ]]>
<![CDATA[Pratowo Aji]]>;
<![CDATA[Indra Roza]]>
<![CDATA[ JET (Journal of Electrical Technology) Vol 8, No 2 (2023): Edisi Juni ]]>
Publisher : <![CDATA[Universitas Islam Sumatera Utara ]]>
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DOI: 10.30743/jet.v8i2.7682
<![CDATA[Saat ini energi fosil semakin hari semakin sedikit, maka pemanfaatan energi matahari salah satu alternatif untuk mencegah habisnya bahan bakar fosil, saat ini masyarakat sudah tidak asing lagi dengan panel surya, dan sudah banyak di gunakan baik di industi maupun di perumahan masyarakat, selain efisien dan tidak menimbulkan pencemaran baik lingkungan udara maupun suara di bandingkan dengan Genset yang perawatannya juga cukup mahal, panel surya juga memiliki perawatan yang hampir sama diantaranya perawatan Solar Cell, pengisi daya (Charger), baterai, dan inverter. Jika unit Genset harus mengontrol bahan bakarnya tersedia panel surya juga harus mengontrol baterai terisi dengan penuh pentingnya menjaga baterai agar tidak cepat rusak maka dari itu wajib di pasang kontrol pengisi daya (charger) di mana alat ini berguna untuk pengisi baterai dan akan beralih ketika baterai habis pada saat di gunakan, tegangan kerja pengisi daya (charger) pada saat baterai habis adalah kurang dari 11 volt DC di mana baterai di cas dengan tegangan PLN dan inverter tidak bekerja, beban di alihkan menggunakan listrik PLN jika baterai yang tercas dan tegangan baterai mencapai lebih dari 12 volt DC maka akan kembali beralih menghidupkan beban menggunakan tenaga baterai. ]]>
<![CDATA[Alat Pengusir Hama Burung Otomatis Berbasis Arduino (Atmega328 ) Menggunakan Sensor PIR (Passive Infra Red) ]]>
<![CDATA[Odi Frastiya]]>;
<![CDATA[Indra Roza]]>;
<![CDATA[Agus Almi Nst]]>
<![CDATA[ JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol. 9 No. 2 (2026): Journal of Electrical and System Control Engineering ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jesce.v8i2.12862
<![CDATA[Bird pests are a threat to agricultural crops, especially rice, corn, and fruit crops. This study designs an automatic bird repellent device based on Arduino (ATMega328) with a PIR (Passive Infrared) sensor to detect bird movement. When the PIR sensor detects birds, Arduino activates the sound module through a speaker to repel them. This device is designed to be energy efficient and works well in various weather conditions. Testing for 7 days in agricultural land showed the effectiveness of the device, with a significant decrease in the number of birds from an average of 30 birds per day on the first day to 5 birds per day on the seventh day. In addition, this device has low power consumption, around 0.5 kWh per day, which shows high efficiency in energy use.]]>
<![CDATA[Rancang Bangun Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) ]]>
<![CDATA[Roberto Sinaga Roberto]]>;
<![CDATA[Indra Roza]]>;
<![CDATA[Ahmad Yanie]]>
<![CDATA[ JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol. 9 No. 2 (2026): Journal of Electrical and System Control Engineering ]]>
Publisher : <![CDATA[Universitas Medan Area ]]>
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DOI: 10.31289/jesce.v8i2.12864
<![CDATA[This study aims to design and build a Micro Hydro Power Plant (PLTMH) as an alternative solution for providing electrical energy in remote areas with adequate water flow potential. PLTMH utilizes kinetic energy from river flow to drive a turbine, which is converted into electrical energy through a generator. The research process involves several important stages: survey of water flow potential, design of mechanical and electrical systems, and installation and testing of the system. The survey aims to determine the optimal water discharge, while the design includes the selection of components such as turbines, generators, and electrical power control systems. The results of the study indicate that the designed PLTMH is capable of producing 1 kW of electrical power, sufficient to meet the basic needs of several households in remote areas. Further testing indicates that this system operates with high efficiency, stability, and minimal environmental impact, making it an environmentally friendly technology. Other advantages are the stability of the electricity supply produced and ease of maintenance and operation. This PLTMH is a sustainable solution for limited access to electrical energy in rural areas. Given its wide application potential, PLTMH can contribute to reducing dependence on conventional electricity networks and providing an affordable and reliable energy alternative for communities in hard-to-reach areas.]]>
<![CDATA[Transient Analysis on Switching Capacitor Bank Using Power Factor Regulator ]]>
<![CDATA[Alka Warizmi]]>;
<![CDATA[Indra Roza]]>;
<![CDATA[Ahmad Yanie]]>
<![CDATA[ Journal of Renewable Energy, Electrical, and Computer Engineering Vol. 5 No. 1 (2025): March 2025 ]]>
Publisher : <![CDATA[Institute for Research and Community Service (LPPM), Universitas Malikussaleh, Indonesia ]]>
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DOI: 10.29103/jreece.v5i1.18707
<![CDATA[This study discusses the analysis of transients that occur in capacitor bank switching using a power factor regulator (PFR). Electric power systems use capacitor banks to offset reactive power, enhance power factors, and minimize energy losses. However, the switching process in capacitor banks can cause significant voltage and current spikes, known as transient phenomena, which can damage equipment and disrupt system stability. This study conducts simulations and analyzes the impact of transients that occur during the capacitor bank switching process on the electric power system. The simulation is carried out using software that models the behavior of the electric power system, focusing on how the power factor regulator regulates the switching process and its impact on the resulting transients. The simulation results show that the use of PFR can reduce the negative impact of transients, but improper settings can still cause disturbances that have the potential to damage the system. These findings provide important insights for system engineers in designing and operating more reliable power systems, considering the importance of proper settings on the power factor regulator to minimize the effects of transients on capacitor bank switching. This study also recommends several mitigation strategies to reduce the impact of transients and improve overall system stability.]]>
<![CDATA[RANCANG BANGUN PLTS DENGAN SISTEM ATS BERBASIS SONOFF SEBAGAI IOT MODEREN ]]>
<![CDATA[muhammad aswad yusuf]]>;
<![CDATA[indra roza]]>;
<![CDATA[sukri mulia]]>
<![CDATA[ Jurnal Nasional Teknologi Komputer Vol 6 No 3 (2026): Juli 2026 ]]>
Publisher : <![CDATA[CV. Hawari ]]>
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DOI: 10.61306/jnastek.v6i3.439
<![CDATA[Kebutuhan akan pasokan listrik yang stabil dan berkelanjutan semakin meningkat,terutamadi era digital yang menuntut ketersediaan energi tanpa henti. Pembangkit Listrik Tenaga Surya (PLTS) menjadi salah satu solusi energi terbarukan yang ramah lingkungan dan potensial untuk digunakan sebagai sumber listrik alternatif. Namun, penggunaanPLTS masih memiliki keterbatasan, terutama pada saat intensitas cahaya matahari menurun.Oleh karena itu, diperlukan sistem otomatis yang dapat memindahkan beban listrik ke sumber cadanga secara cepat dan efesien. Penelitian ini bertujuan untuk merancang dan membangun sistem PLTS yang dilengkapi dengan Automatic Transfer Switch (ATS) berbasis Internet of Things (IoT) menggunakan modul Sonoff, sehingga sistem dapat memantau dan mengendalikan perpindahan sumber daya listrik secara otomatis dari jarak jauh melalui aplikasi smartphone. Sistem ini menggunakan PLTS sebagai sumber utama dan PLN sebagai sumber cadangan yang akan diaktifkan ketika PLTS tidak mampu menyuplai beban. Hasil pengujian menunjukkan bahwa sistem mampu melakukan perpindahan sumber listriksecara otomatis dan akurat, serta dapat dikontrol melalui jaringan internet dengan aplikasi eWeLink. Integrasi Sonoff sebagai perangkat IoT memberikan kemudahan dalam monitoring dan pengendalian sistem, menjadikan sistem ini sebagai solusi cerdas dan modern dalam manajemen energi rumah tangga atau skala kecil.]]>
<![CDATA[Rancang Bangun Sistem Kontrol Otomatis Berbasis Panel Surya pada Mesin Spinner Oil ]]>
<![CDATA[Putra Agung Dwi Yanto]]>;
<![CDATA[Indra Roza]]>;
<![CDATA[Dede Ibrahim Muthawali]]>;
<![CDATA[Budhi Santri Kusuma]]>;
<![CDATA[Agus Almi Nasution]]>
<![CDATA[ IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus ]]>
Publisher : <![CDATA[CV. IRA PUBLISHING ]]>
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DOI: 10.56862/irajtma.v4i2.231
<![CDATA[Improving efficiency and sustainability in industrial processes is a key focus in modern technological development. This study aims to design an automatic control system for an oil spinner machine using renewable energy from solar panels. The system is intended to enhance operational efficiency, reduce reliance on conventional energy sources, and support environmentally friendly initiatives. It integrates sensors to monitor machine conditions such as speed and raw material levels, with a microcontroller unit connected to solar panels as an alternative energy source. The methodology includes system design, microcontroller programming, solar panel installation, and operational testing. Results show that the system successfully improved machine efficiency, reduced consumption of non-renewable energy, and contributed to lowering carbon emissions. This research provides a significant contribution to the development of renewable energy-based automation systems. It opens opportunities for similar applications in other industrial processes requiring efficient and eco-friendly solutions.]]>
