EPSILON: Journal of Electrical Engineering and Information Technology

Design of a Real-Time Productivity Monitoring Dashboard System for CNC Machines at PT X

2025-07-04T13:34:34+07:00

PT X is a contract manufacturing company that produces metal-based items and has established contracts with several manufacturers, resulting in variations in item demand. The demand for all items can be met through the company’s four departments: cutting, milling, Computer Numerical Control (CNC), and press. Among these departments, the CNC department recorded the lowest productivity percentage in 2023. This was due to the absence of tools or dashboards capable of monitoring CNC machine conditions in real time. To address this issue, a dashboard system was designed to monitor the productivity of CNC machines. The design method used in this study is the Vilarinho method, which begins with diagnosing the productive area, followed by planning and identifying system requirements, developing the system, and concluding with system testing and implementation. The dashboard system was developed using Node-Red software and implemented directly on two CNC machines. The dashboard includes a display that presents data and information reflecting the productivity of CNC machines at PT X. This dashboard will serve as a tool for monitoring and decision-making for both managerial staff and production personnel regarding the CNC machine production process.

DESIGN AND DEVELOPMENT OF A 144V/220AH LITHIUM BATTERY PACK FOR ELECTRIC VEHICLES

2025-07-04T13:34:58+07:00

The development of electric vehicle (EV) technology is advancing rapidly in various aspects, driven by the need for environmentally friendly and efficient transportation solutions. Electric vehicles are powered by electric motors, which require an energy source in the form of a battery arranged into a battery pack. A battery pack consists of battery cells arranged in series and parallel to meet the energy specifications required by the electric vehicle.

Currently, lithium batteries are considered the best choice for electric vehicles due to their advantages in energy density and cost per cycle compared to other types of batteries. In the design of this battery pack, the vehicle's specifications require a voltage of 144V to power the electric motor, with a target usage time of 5 hours, leading to a designed capacity of 220Ah. The battery used is a Lithium Ferro Phosphate (LFP) type with specifications of 3.2V and 22Ah. Based on mathematical calculations, the battery pack design utilizes 10 batteries in parallel and 48 in series to achieve the required specifications.

The design also takes into account the maximum storage space inside the vehicle, with the battery pack divided into two banks placed in the front and rear of the vehicle to maintain a balanced center of gravity. After assembly, voltage measurements showed that the maximum voltage achieved was 153.6V. Testing was conducted after the batteries were installed in the vehicle, which showed that the vehicle could be operated for 19 hours with an average current of 11.5A. From the test results, the battery capacity was calculated to be approximately 218.5Ah. The test results indicate that the battery performance does not fully match the theoretical calculations, due to factors such as battery characteristics and energy losses in the vehicle system.

Prototype Aplikasi Sistem Akses Terintegrasi dengan Kartu RFID dan Pengenalan Wajah Berbasis Mikrokontroler Esp32

2025-07-04T13:34:16+07:00

Building access systems have enhanced security but often rely on costly foreign products. This research aims to develop an employee attendance application that integrates facial recognition using the Siamese network method with RFID for dual authentification. Designed to improve security and efficiency, the application allows for real-time monitoring and data collection of employee access without requiring additional hardware when expanding the system. The study designs an access system based on RFID and facial recognition with the Siamese network method. The system includes RFID nodes, a base station, a WiFi access point, a web dashboard, and a database. The RFID nodes read UID data, which is sent to the base station for verification. The system uses the ESP32 microcontroller and is integrated with a Next.js web server to monitor and manage employee attendance data. The test results indicate that the RFID can read RFID cards within a reading range of approximately 0 to 10 cm. The ESP-NOW communication can transfer data within a time range of 0 to 341 ms and a distance range of 50 to 400 cm between microcontrollers without using an external antenna. The HTTP communication protocol has a data transfer speed of approximately 700 ms with an internet download/upload speed of 10.5/5.41 Mbps. Facial recognition using the Siamese network model achieved an average threshold of 0.736 out of 0.5 under various lighting conditions and distances.

Implementation of Book Detection System Using YOLOv8

2025-07-04T13:33:58+07:00

Pendeteksian objek secara otomatis merupakan salah satu teknologi yang berkembang pesat dalam bidang visi komputer, khususnya dalam konteks pengelolaan data visual berbasis citra digital. Buku sebagai objek fisik yang umum dijumpai di perpustakaan, toko, dan lingkungan pendidikan memiliki potensi untuk diidentifikasi secara otomatis guna mendukung proses inventarisasi dan digitalisasi. Tujuan jurnal ini ialah untuk mengimplementasikan dan mengevaluasi kinerja algoritma deteksi objek YOLOv8 dalam mengenali dan melokalisasi objek buku pada gambar statis. Model YOLOv8 dipilih karena memiliki arsitektur yang efisien dan telah terbukti unggul dalam kecepatan serta akurasi deteksi. Dataset yang digunakan terdiri dari citra-citra beranotasi yang menggambarkan berbagai kondisi penempatan dan orientasi buku. Setelah melalui proses pelatihan dan pengujian, model dievaluasi menggunakan metrik precision, recall, F1-score, dan mean Average Precision (mAP). Model deteksi ini memiliki nilai box loss sebesar 0.4325 dan class loss sebesar 0.3096. Semakin kecil nilai loss, semakin akurat prediksi yang dihasilkan oleh model. Model juga mencapai mAP 50 sebesar 0.80 dalam metrik, dan mAP50-0.97 sebesar 0.811 dalam metrik. Hasil penelitian ini berhasil mengimplementasikan model YOLOv8 untuk mendeteksi buku dengan tingkat presisi sebesar 88% dan recall sebesar 94% dengan tingkat akurasi sebesar 90% dan 92%.

Design and Development of the Drive System on GPR (Ground Penetrating Radar)

2025-07-04T13:33:39+07:00

Ground Penetrating Radar (GPR) has become an essential tool in mapping and imaging subsurface features. However, to enhance precision and control in GPR usage, a GPR drive system utilizes stepper motor technology. The study focuses on the importance of precise control over GPR movement to improve scanning accuracy and image quality. By integrating stepper motors into the drive system, the research endeavors to enhance the precision, reliability, and efficiency of GPR in subsurface scanning. Through detailed design steps, the implementation of stepper motors aims to structurally and measurably control GPR movement. The design and construction of the GPR drive system using stepper motors aim to enhance precision and control in subsurface scanning. Through detailed design steps, the implementation of stepper motors aims to structurally and measurably control GPR movement. The design and construction of the GPR drive system using stepper motors aim to enhance precision and control in subsurface scanning. The integration of GUI and Arduino IDE in stepper motor control has proven effective, providing consistent and accurate control. Performance analysis indicates that stepper motors with A3967 drivers exhibit high accuracy, particularly in movements ranging from 0.5 to 2 cm, with insignificant errors. Stepper motors also demonstrate consistency across various speeds, while the direct relationship between pulse duration and duty cycle influences speed and position control with precision. Thus, the utilization of stepper motors in the GPR drive system improves precision, control, and image quality in subsurface scanning , supporting GPR applications in fields such as geology, archeology, and construction.

Keywords : GPR, XY Coordinates, Stepper Motor, Automated drive system, Arduino IDE, and Scanning Precision

Analisis Quality Of Service (QoS) Jaringan Internet Berbasis Wireless Local Area Network di Gedung Fakultas Psikologi Unjani

2025-07-04T13:33:21+07:00

Gedung Fakultas Psikologi Unjani, seiring dengan digitalisasi bebagai layanan administrasi, pelayanan publik bagi mahasiswa dan kebutuhan Dosen terdapat fasilitas internet WLAN yang semakin meningkat. Permasalahan yang sering timbul yaitu dalam hal kualitas jaringan internet, terutama pada hari hari sibuk disebabkan karena banyaknya pengguna mengakses jaringan secara bersamaan. Metode penelitian yang digunakan meliputi pengukuran langsung pada jaringan WLAN yaitu Access Point Aruba AP-505 Wi-Fi 6, frekuensi 5 GHz. Pengukuran dilakukan selama 4 hari secara Streaming You Tube, menggunakan Software Wireshark pada laptop Acer RYZEN 5. Pengambilan data dilakukan selama 5 menit, Hasil penelitian menunjukan bahwa kualitas jaringan WLAN di Gedung Fakultas Psikologi Unjani hasilnya bersifat variatif. Berdasarkan hasil rata-rata indeks keseluruhan dari enam hari tersebut dengan nilai rata-rata delay 4,899 ms - 13,83 ms, indeks di angka 4. Rata-rata Jitter yaitu 1,996 ms - 3,915 ms, dengan indeks 3. Packet loss, yang cukup tinggi dari 3,475% - 10,02%, dengan indeks 3. Throughput mulai dari 55,75 Kbps/s - 20.197,75 Kbps/s, dengan indeks yang bervariasi antara 2 hingga 4. Berdasarkan keseluruhan hasil rata-rata indeks dari enam hari tersebut didapatkan hasil sebesar 3.42, menunjukkan bahwa kualitas jaringan tersebut dapat diakategorikan sangat memuaskan.

Perancangan dan Realisasi Sistem Kendali Furnace Menggunakan Ratio Control Berbasis Distributed Control System Centum VP R05.04.20

2025-07-04T13:33:04+07:00

In the oil and gas processing industry, a reliable control system is essential to ensure energy efficiency and operational safety. One of the critical elements is the control of the air-to-fuel ratio in the combustion process of the furnace. This study aims to design and implement a furnace control system using a ratio control strategy based on the Yokogawa Distributed Control System (DCS) Centum VP R5.04.20. The system is designed to precisely regulate the mass flow rates of air and fuel to achieve optimal combustion efficiency and minimize emissions. Control is executed via PID configuration within the DCS, with parameter tuning optimized to maintain process stability. The implementation results indicate that the system operates under stable conditions with a ratio gain of 2.5, and PID parameters for FIC102 (P=100, I=10, D=0) and PIC201 (P=180, I=60, D=0). The system successfully improves control response and furnace operational efficiency, while also providing a foundation for the future adoption of more advanced automation systems.