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Jurnal E-Komtek
Published by Politeknik Piksi Ganesha Indonesia
ISSN : 25803719     EISSN : 26223066     DOI : https://doi.org/10.37339/e-komtek.v4i2.269
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering
Jurnal E-Komtek (Elektro-Komputer-Teknik) is a Journal that contains scientific articles in the form of research results, analytical studies, application of theory, and discussion of various problems relating to Electrical, Computer, and Automotive Mechanical Engineering.
Arjuna Subject : Ilmu Komputer (semua kategori) - Visi Komputer dan Pengenalan Pola
Articles 32 Documents
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Search results for , issue "Vol 9 No 2 (2025)" : 32 Documents clear
Analysis of The Effect of Drive Pulley Diameter Variation on Electric Motorcycle Performance Eric Rico Ardiansyah; Puspitasari, Indah; Nanang Romandoni; Prayogo Arie Bowo; Novi Indah Riani; Deni Nur Fauzi
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2880

Abstract

The primary objective of this study is to investigate how different sizes of drive pulleys influence the performance of an electric motorcycle equipped with a BLDC motor. This was approached using an experimental technique that combined dynotesting and road testing where three drive pulley diameters of 42T, 44T, and 46T were used. While the road tests were intended to measure the top speed of the motorcycle, the dynotests were aimed at acquiring the necessary data to calculate the torque and power. Based on the results of this study, an increase in the drive pulley's diameter will increase the speed of the electric motorcycle, although it will lower the torque. It was found that the 42T drive pulley offers the greatest torque, which is 16.54 Nm at a power of 5.2 HP, and the 46T drive pulley allows for the greatest speed of 63.37 km/h. It is thus apparent that for performance to be properly tailored to the motorcycle, a balance should be struck in line with the intended purpose, which can either be acceleration or the cruising speed.
An Analysis of Students’ Perceptions and Learning Motivation in a Gamified Learning Management System Nugroho, Adlan; Prih Diantono Abda'u; Antonius Agung Hartono; Joko Purwanto
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2896

Abstract

The use of Learning Management Systems (LMS) in lectures is increasing, but student motivation to learn often poses a challenge. This study aims to examine the effect of gamification in LMS on student motivation to learn and to analyze the relationship between students' perceptions of gamification and their motivation levels. The study uses a quantitative design with measurements taken before and after the implementation of gamification, as well as correlation analysis to examine the relationship between variables. The results show that there is no significant difference between motivation before and after the implementation of gamification. However, perceptions of gamification are positively related to autonomy, connectedness, and achievement, which contribute to increased learning motivation. These findings indicate that gamification has an indirect effect through the reinforcement of psychological aspects that support intrinsic motivation.
Warehouse Re-Layout for a Third-Party Logistics Provider Based on Shipping Patterns Using the Apriori Algorithm Hidayatuloh, Syarif; Br Tarigan, Jenni; Noor Qisthani, Nabila
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2899

Abstract

Warehouse operations face challenges that affect efficiency. PT ABC, a third-party logistics provider, has been experiencing these issues due to an unstructured warehouse layout. It leads to inefficient movement and delayed deliveries. This study aims to re-design the warehouse layout of PT ABC based on shipping patterns using the apriori algorithm. Shipment data from January to June 2024 was analyzed using the apriori algorithm with a minimum support of 30% and a confidence level of 50% to find frequently shipped item combinations. One of the strong associations found was between "Mechanical Components" and "Spare Parts," with a lift value of 1.68. Based on the results, a proposed layout was developed by considering both the FSN (Fast, Slow, Non-moving) classification and apriori findings. The effectiveness of the new layout was evaluated using rectilinear distance calculations, which showed a reduction in total item movement distance from 45,952 meters to 44,343 meters.
Study of the Effect of Simple Filtration Composition of Waste Cooking Oil on the Quality of Biodiesel for Generator Fuel Musyafiq, Afrizal Abdi; Novita Asma Ilahi; Oki saputra
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2908

Abstract

Used cooking oil has great potential as a raw material for biodiesel due to its abundant availability and low price, but its quality often decreases due to high free fatty acid and impurities content. This study aims to examine the effect of variations in simple filtration compositions on improving the quality of used cooking oil before the conversion process into biodiesel. The filtration process was carried out using a combination of simple media such as activated charcoal, fine sand, and zeolite in certain ratios. The parameters tested included the density value at 15°C (kg/m³), the kinematic viscosity value at 50°C (mm²/s), and the calorific value (kcal/g) of the produced biodiesel. The experimental method involved several variations in filtration compositions followed by a standard transesterification process. The results of the study showed that the optimal filtration composition was able to produce B40 biodiesel at a temperature variation of 50-60 15°C with a density value of 868.5 kg/m³, a kinematic viscosity of 3,570 mm²/s, and a calorific value of 9772.4 kcal/g according to the standard range of SNI 7182:2015. In addition, biodiesel from simply filtered used cooking oil can be used as a generator fuel with an energy efficiency performance of 34.79% in an 8.5 kVA generator test. This finding provides an alternative for simple, inexpensive, and environmentally friendly used cooking oil processing to support the availability of renewable energy.
Exploration of Engineered Diode Current-Voltage Convergence for Maximum Power Point Tracking in Single-Axis Solar Tracker Systems. Ilahi, Novita Asma; Musyafiq, Afrizal Abdi; Hazrina, Fadhillah
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2919

Abstract

Indonesia, situated in the tropics, possesses optimal solar irradiation potential, positioning it as an ideal location for the deployment of photovoltaic (PV) energy systems. Given the escalating electricity demand driven by demographic expansion and technological advancements, harnessing solar panels as a viable alternative energy source is crucial. Nevertheless, static PV installations frequently yield suboptimal power absorption. This research, titled "Exploration of Diodic Current-Voltage Convergence of Maximum Power Point Engineering in a Single-Axial Solar Tracker System," focuses on an advanced approach to power optimization. Specifically, the study designs and evaluates a system capable of optimally capturing solar radiation by integrating a 20 Watt Peak (WP) PV unit with an automatic Solaris Single-Axial Tracker. The system architecture utilizes an Arduino Nano microcontroller as the core control unit, which is equipped with an ACS712 current sensor and a DC voltage sensor. Real-time data communication is accomplished using a Node-MCU ESP8266 module for serial transmission. Comparative analysis reveals a significant performance enhancement in the PV system attributed to the automatic tracking implementation. The average power absorbed by the 20 WP solar panel increased from 89.2 W (without tracking) to 93.70 W when the Single-Axial Tracking system was employed. Correspondingly, the PV panel's efficiency improved from 78.4% (static) to 82% (tracked). Furthermore, the monitoring data (current, power, and voltage) is visualized in real-time on a smartphone via the Blynk application, enabled by an internet-based communication protocol. This investigation successfully demonstrates that a microcontroller-based single-axial tracking system offers an efficient solution for maximizing solar energy absorption in tropical environments.
Digital Forensics Implementation on CCTV Using ISO/IEC 27037 and ISO/IEC 27042 Maulana, Zakaria Dwi Arman; Mukhlis Prasetyo Aji; Agung Purwo Wicaksono; Harjono
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2920

Abstract

Digital evidence in the form of CCTV footage is crucial data in legal investigations, but its integrity and authenticity are often questioned due to the lack of standardization of digital forensic procedures. This study aims to design and test the effectiveness of the implementation of a digital forensic framework based on the international standards ISO/IEC 27037:2012 (guidelines for acquisition and preservation) and ISO/IEC 27042 (guidelines for analysis and interpretation). The research method involves the application of the four-stage procedural ISO/IEC 27037 (Identification, Collection, Acquisition, and Preservation) on a CCTV V380 MicroSD card, followed by analysis using ISO/IEC 27042 principles and Autopsy software. The results show that this framework is fully effective. The integrity of the digital evidence is guaranteed, evidenced by the consistency of hash values ​​(MD5 and SHA1) that are verified Matched throughout the acquisition process until the preparation for analysis. Furthermore, the analysis procedure successfully retrieves information from videos that have been deleted from Unallocated Space, complete with important forensic metadata. This study concludes that the ISO/IEC framework has proven effective in ensuring the authenticity of evidence, and is therefore recommended as a scientifically and legally valid standard operating procedure model for forensic practitioners.
Design and Construction of a NodeMCU-Based Heart Rate and Blood Oxygen Level Monitoring Device with Blynk Application Output Miftahurrohman; Asni Tafrikhatin; sumarah, Jati; El Vionna Laellyn Nurul Fatich
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2927

Abstract

Health is a crucial aspect of human life that must be maintained and monitored regularly, especially during recovery periods or self-isolation. Real-time and remote body monitoring has become an essential need in today’s digital era. This study aims to design and develop a heart rate and blood oxygen saturation monitoring device based on the Internet of Things (IoT) using the NodeMCU ESP8266 microcontroller integrated with the MAX30100 sensor and the Blynk application. The research method involves the design of an electronic system based on microcontrollers, software programming, and direct functional testing. The test results show that the device is capable of accurately detecting heart rate (BPM) and oxygen saturation (SpO2), displaying the data on a 16x2 LCD, and transmitting it to the Blynk application in real-time via a WiFi connection. Therefore, the developed device has proven to function effectively as a practical and portable remote health monitoring system.
Design And Construction of a Non-Contact Body Temperature Measuring Device Using the Mlx90614 Sensor Based on Nodemcu and the Blynk Application Asni Tafrikhatin; Ajeng Tiara Wulandari; Juri Benedi; Intan Maharani
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2968

Abstract

Body temperature is an important indicator for monitoring a person's health condition. The average normal human body temperature ranges from 36–37°C. Changes in body temperature, whether hyperthermia or hypothermia, may indicate infections or metabolic disorders, making accurate and practical measurement methods essential. Conventional contact thermometers have limitations, such as long measurement times and user discomfort. To overcome these issues, a non-contact body temperature measurement system was designed using an infrared sensor. This sensor works by detecting thermal radiation emitted from the body’s surface without requiring direct skin contact. The device utilizes the MLX90614 infrared sensor, an ultrasonic sensor for distance detection, and a switch as an on/off control. Measurement results are displayed on an OLED screen and can be monitored via a smartphone through the Blynk platform. Based on testing, the non-contact body temperature measurement device achieved an accuracy level of 99.3%.
Design and Construction of Special Tools for Rear Seal Removal and Installation on Komatsu Engine Flywheel Housing Aryadi , Ari Aryadi; Budi, Budi Utomo Wisesa; Hamid, Hamid Nasrullah; Lucky Herlyana
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2998

Abstract

This research focuses on the innovation of mechanical work aid design in the form of special tools specifically used to remove and install the rear seal on the flywheel housing of Komatsu diesel engines type SAA6D107E-1 and SAA4D95LE-3. One of the procedures that is still done manually and has high risk is the replacement of the rear seal on the flywheel housing. The purpose of using special tools is to gain efficiency in the removal and installation of the rear seal on the flywheel housing. The research method includes field observation, component measurement, 2D and 3D design, and direct field trials. The test results show that this tool can reduce the processing time from 55 minutes to 20 minutes. The use of these special tools helps technicians in increasing the work speed in removing and installing without causing damage to other components.
Modeling and Optimization of PET Filament Making Machine Control System Based on Response Surface Methodology Fauzi, Deni Nur; Kurniawan, Pradhana; Junaedi, Imam; Wicaksono, Rendi Pambudi; Mahardi, Nabila Bilqis
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.3017

Abstract

This study aims to model and optimize the control system of a PET filament making machine using Response Surface Methodology (RSM). Two main variables, namely extrusion temperature and winding speed, were analyzed through the Central Composite Design experimental design with the help of Design-Expert 13 software. A quadratic model was developed to predict the filament diameter, and the results of the analysis of variance showed that the model was statistically significant and able to represent the nonlinear relationship between variables. Optimization based on the desirability function produced optimum operating conditions at a medium temperature and winding speed range. Experiments showed that the combination of a temperature of 240–245 °C and a speed of 9–12 rpm produced a consistent filament diameter of 1.7 mm with 70–80% flexibility and a smooth surface.

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