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Department of Electrical Engineering and Informatics, Vocational College Universitas Gadjah Mada Gedung Herman Yohanes Sekip Unit III, Catur Tunggal, Depok, Sleman, Yogyakarta, Indonesia 55281
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INDONESIA
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan
Published by Universitas Gadjah Mada
ISSN : -     EISSN : 27462536     DOI : https://doi.org/10.22146/juliet.v2i1
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
The Journal of Electricity, Instrumentation and Applied Electronics (JuLIET) is an open-access journal published by the Department of Electrical and Information Engineering, Vocational School, Gadjah Mada University. JuLIET is issued twice a year with varying volumes. JuLIET was first published, Vol 1, No 1 in April 2020. This journal contains writings taken from the results of research and analytical studies in the field of applied science and technology, specifically Power Systems, Generators, Power Distribution and Transmission, Power Distribution and Transmission, Electrical Power Conversion, Distributed Generation, Protection Systems, and Renewable Energy for the scope of Electrical Engineering. Next, Instrumentation, Sensors and Actuators, Industrial Instrumentation for Instrumentation scope. And Signal, System, and Electronics, Digital Signal Processing, Image Processing, Robotic Systems, Control and Automation Systems, and Embedded Systems for Applied Electronics scope.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 75 Documents
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Box Design of Series Parallel Plug-in and Monitoring of LiFePO4 Battery Performance as Solar Panel Power Storage Affandi, Faradina Virdania; Ahmad, Ilham Dhani; Abadi, Muhammad Ridha; Desideria, Raden Roro Wyne Ananda; Aji, Wahyu Waskito; Putri, Tika Erna
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.109557

Abstract

The development of renewable energy, especially solar power, drives the need for efficient and safe energy storage systems. Lithium Iron Phosphate (LiFePO₄) battery are one of the main choices because they have stable characteristics, long service life, and are safe against high temperatures. This study aims to design a bateraiery container and a LiFePO₄ battery performance monitoring system as a power storage from solar panels. The container design considers thermal aspects, safety, and practicality of installation, while the monitoring system is built using an ESP32 microcontroller integrated with an ACS712 current sensor, a voltage sensor, and a DS18B20 temperature sensor to measure important bateraiery parameters. Tests were conducted to assess the performance of the monitoring system accuracy, bateraiery performance under charging and discharging conditions, a series-parallel plug-in connection system using an XT60 connector, and the effect of using a fan on the container at outdoor temperatures. The results show that the monitoring system has a current sensor error of 13.64%, a voltage sensor error of 1.01%, and a temperature sensor error of 4.92%. The reliability of the series-parallel plug-in connection system using XT60 connectors is considered good and works well. The cooling fan used has good usability for maintaining the battery temperature inside the container at outdoor temperatures.
Automatic Capacitor Bank Planning Design using Microcontroller for Power Factor Optimization Ibrohim, Ibrohim; Haryudo, Subuh Isnur; Endryansyah, Endryansyah; Zen, Hafidz Nindhom
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.110984

Abstract

Low power factor (cos φ) remains a prevalent issue in residential electrical installations, primarily due to inductive appliances such as air conditioners, refrigerators, and water pumps, which increase reactive power and reduce overall system efficiency. This condition leads to voltage drops, increased current flow, and higher I²R losses, affecting electricity expenditure and long-term equipment reliability. To address this problem, this study proposes an automatic power factor correction system based on reactive power compensation, where capacitors function as local suppliers of reactive power to stabilize voltage and reduce grid loading. The system utilizes an Arduino Nano microcontroller integrated with a PZEM-004T sensor for real-time monitoring of voltage, current, and power factor. Based on the measured parameters, capacitor switching is performed using relay-based control to enable adaptive compensation according to load variations. Experimental testing was conducted under real household operating conditions for a total duration of four months, including pre- and post-intervention measurements. The results showed a substantial improvement in power factor, increasing from 0.79–0.82 to 0.91–0.99 after capacitor bank installation. Current consumption also decreased—for example, from 4.23 A to 3.50 A in Week 1 and from 9.61 A to 8.10 A in Week 5, indicating reduced power losses and improved voltage stability. Furthermore, energy usage declined from 737 kWh to 605 kWh over two months, resulting in an energy saving of 17.9%. In conclusion, the proposed system demonstrates that low-cost automated power factor correction can effectively enhance residential energy efficiency and offer measurable economic benefits for household consumers.
Exoskeleton Intervention in Car Assembly Line to Minimize the Potential of Musculoskeletal Disorder Risk Chedana, Saskara B'tari; Redi, Anak Agung Ngurah Perwira; Darma, Panji Nursetia
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.113187

Abstract

Musculoskeletal Disorders (MSDs) remain one of the most prevalent occupational health issues worldwide, commonly caused by repetitive motions, awkward postures, and excessive physical load. In Indonesia, more than 40% of workers from various industries report MSD symptoms. Although ergonomic control measures aligned with international standards (e.g. ISO) have been implemented, these strategies are often insufficient to ensure safer postures sustained during work activities. Exoskeletons have been developed as a promising supplemental ergonomic intervention through its biomechanical mechanisms. This study examined the effectiveness of a passive shoulder-support exoskeleton adoption in one of the car assembly activities. Ten young adults performed repetitive bolt-tightening under two conditions: with and without exoskeleton assistance. MSD symptoms were assessed using the Borg CR-10 exertion scale, while postural risk was evaluated using the Rapid Upper Limb Assessment (RULA). Additionally, task completion and recovery times were recorded to evaluate task efficiency. Subjective perception regarding acceptability and safety perception towards the device were assessed through a questionnaire. Based on the experimental results, the exoskeleton reduced perceived muscle exertion mainly in the wrist region and reduced task completion time by 13.6%. A notable reduction in post-task recovery time (19.08%) was also observed under the exoskeleton condition. The overall RULA score decreased from 7 (high risk) to 5.5 (medium risk), indicating a reduction in ergonomic risk. Furthermore, questionnaire responses revealed positive perceptions related to task speed and mobility support, although some usability challenges were noted. Overall, these findings suggest that passive shoulder-support exoskeletons have the potential to enhance worker safety, comfort, and task efficiency in repetitive elevated automotive assembly tasks.
The Evaluation of Lighting System Planning based on Green Building Concepts using DIALux Evo Software Rosyad Febrian, Muhammad Dziya'ur; Pravitasari, Deria; Kurniawan, Andriyatna Agung; Setiawan, Hery Teguh
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.113428

Abstract

Building construction contributes to 40% of carbon emissions, while during the operational phase, approximately 50% of energy is used to create an artificial climate, such as lighting systems. This study applies the Green Building concept to the lighting system on the first floor of Building X with the aim of achieving energy savings and reducing carbon emissions. The scope of the study includes the evaluation and improvement of the lighting system design on the first floor of Building X based on Green Building standards in accordance with Minister of Public Works and Public Housing Regulation No. 21 of 2021. The evaluation results show that the lighting system on the first floor of Building X does not fully meet Green Building standards, therefore improvements are needed. Improvements to the artificial lighting system were made by recalculating the lighting requirements, resulting in a 16.62% reduction from the initial plan. Meanwhile, improvements to natural lighting by combining it with artificial lighting resulted in a reduction of up to 61.28%. Therefore, the first floor of Building X supports one of the principles of the Green Building concept, which is the reduction of energy use and carbon emissions.
Automatic Rubber Tapping Bowl Cover Based on Raindrop Sensor and Remote-Control using Telegram Dasmen, Rahmat Novrianda; Ardianto, Ardianto; Herda, Fitria Destian; Faizal, Faizal; Rasmila, Rasmila
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.117159

Abstract

Rubber plantations are one of the primary commodities providing livelihoods for farmers in Indonesia, such as in South Sumatra Province. The main issue: rainwater contamination reduces the quality and market value of latex, impacting farmers’ income. The quality of the latex produced significantly affects its market value, with rainwater contamination being a key factor. A decline in latex quality will lead to a decrease in its market value, which in turn will affect rubber farmers’ income. Therefore, this study developed an IoT device for rubber tapping containers with a cover, which will automatically close the container using a rain sensor. Method action research with field testing in Meranjat Village, Ogan Ilir. This is an effort to prevent latex from being contaminated by rainwater during rainy weather conditions. The application and testing of this automatic rubber tapping container cover were conducted at a rubber plantation in Meranjat Village, Ogan Ilir Regency. Results: 95% closure success rate (sensor activates at 3–5 drops), PIR detection <30 cm, Telegram control. Test results show an automatic closure success rate of 95%, with the rain sensor activating after 3–5 drops of water. Additionally, this IoT device is equipped with a PIR sensor to alert users of any unauthorized entry or attempts to steal latex from the rubber tapping container. The PIR sensor can detect movement at a distance of less than 30 cm and activate an alarm as a warning. Furthermore, this study also added a remote-control feature for this IoT device using the Telegram app.

Page 8 of 8 | Total Record : 75

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