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Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315
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Jurnal SPEKTRUM
Published by Universitas Udayana
ISSN : 23023163     EISSN : 26849186     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering
Jurnal SPEKTRUM is peer review journal, published four times a year by the Department of Electrical Engineering, Faculty of Engineering, Universitas Udayana. This journal discusses the scientific works containing results of research in the field of electrical, include: power systems, telecommunications, computers, informatics, controls, and electronics. Authors are expected to include original scientific papers in accordance with the scope of the discussion of this journal including all aspects of the theory and practice are used.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 677 Documents
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RANCANG BANGUN WEB MONITORING SISTEM PADA MESIN KONVERSI LIMBAH ORGANIK MENJADI ENERGI LISTRIK Puspitawati, Luh Eka; Sukadarmika, Gede; Arsa Suyadnya, I Made
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p31

Abstract

UD. Nadi Utama is one of the producers and distributors of traditional snacks. As a snack producer, UD Nadi Utama supplies 5 minimarkets every day. To support its business, UD Nadi Utama installs PLN electricity with an average electricity payment of IDR 750,000 per month which is considered to burden production costs. After conducting observations, the capstone project team found that UD, Nadi Utama produces 25 kg of coconut fiber and shell per day. From the problems and potential found at UD Nadi Utama, team capstone project provides a solution in the form of an incinerator. This incinerator has a converter device that can convert the heat generated from combustion into electrical energy. However, monitoring the data of voltage, current, temperature, and the power generated by this incinerator is quite difficult for ordinary users. Because the resulting data is stored in a data logger that can only be downloaded in the form of excel files and cannot be known directly (real-time). This makes it difficult to know when the temperature of the device has decreased, and the amount of power generated by the device. At UD Nadi Utama itself, its human resources have a good ability to use the web system on their mobile devices. From the problems with the conversion tool and the potential of human resources at UD Nadi Utama. A website-based monitoring system is created, which displays the data generated by the data logger in almost real time.
RIVIEW SISTEM PENGOLAHAN AIR PDAM TIRTA MANGUTAMA BADUNG Muhamat, Oscar; Satya Kumara, I Nyoman; Budiastra, I Nyoman
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Water treatment in PDAM is a process in providing clean water supplies for the needs of the community of the district. The quality of the water produced must meet health and environmental standards to ensure that the water consumed is safe and decent for the user. This investigation aims to conduct a review of the water treatment system with a focus on the process of treatment of clean water ranging from raw water taken from the water tank to clean water that can be used by consumers. This process takes place at the intake where the raw water is sucked with two turbine pumps. Then the water is drained to the WTP (Water Treatment Plant) where the wTP is the main clean water treatment building. On the way to WTP there is a chemical process where water is mixed with poly aluminium chloride (PAC) fluid and chlorine to kill bacteria and purify the water. There are several parts of the room that process into clean water thats. the flokuator, then the sedimentation process, after the sedmentation process is continued to the filtration/filter process, in this process the filter uses silica sand as its filter so that the water is free from the dirt of the Sedimentation result, then after being clean water will enter the shelter or reservoir to continue to the customer's distribution system assisted by the booster pump.
PENERAPAN SENSOR CJMCU101 UNTUK MENDUKUNG SISTEM SMART LECTURE ROOM Maisha Putra, I Gusti Agung Ngurah; Andika Pranata, I Kadek; Paramitha Sekar Putri A.P., Ni Made; Sukadarmika, Gede; Raka Agung, I Gusti Agung Putu; Purnama, Fajar; Indra ER, Ngurah
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p22

Abstract

This study presents the design of a Smart Lecture Room system that utilizes light intensity sensors, specifically CJMCU101. These sensors are installed in each classroom to monitor the ambient conditions. The implementation of the designed system was carried out in the classrooms of the Udayana University Electrical Engineering Study Program. To achieve this goal, the classroom utilized by the Electrical Engineering Study Program of Udayana University was divided into two classes (DH101 and DH102) and a sensor was installed in each class as an IoT device. The IoT devices are connected to a Raspberry Pi Access Point, where the data from the sensors is stored and monitored using the Thinger.io platform. The validation of the sensor testing is carried out by comparing the results obtained from the sensors with the results obtained from a thermohygrometer measurement. This research produces a prototype smart lecture system, applied to a classroom mockup, that employs IoT devices, sensor databases, and sensor monitoring. The data from each sensor's detection is stored in the LAMP database, which employs Linux, Apache, MySQL, and PHP. The Thinger.io platform monitors the values of each sensor. A variation in accuracy between the sensor and measuring instrument results in a difference in their values. The CJMCU101 light intensity sensor has an average accuracy of 93.48% compared to the measuring instrument on DH101. The average accuracy of the sensor value compared to the measuring instrument on DH102 is 95.96%.
ANALISIS KEPUASAN PENGGUNA DENGAN SISTEM CHATBOT PEMESANAN MAKANAN DAN MINUMAN VIA TELEGRAM DI RESTORAN Arif, Ariobimo; Sudarma, Made; Shandyasa, I Wayan
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p13

Abstract

In the era of technological advancement, the utilization of Chatbots for food and beverage menu ordering through the Telegram Bot platform emerges as an intriguing alternative to enhance customer experiences in the Food and Beverage industry. This research aims to analyze user satisfaction with the Chatbot implementation using the Heuristic method. In this implementation, the Chatbot is supported by Natural Language Processing (NLP) with a focus on customer satisfaction analysis. The Heuristic method serves as the primary evaluation tool to measure aspects such as service speed, user-friendliness, and information clarity. Analysis results reveal positive user responses to the Chatbot, indicating a high level of satisfaction in system usage. These findings support the notion that employing Chatbots with the Heuristic method can deliver a satisfying experience for customers in food and beverage menu ordering. Practical implications of this research can assist restaurants in enhancing service and efficiency through Chatbot implementation that considers user satisfaction aspects measured by the Heuristic method.
PERANCANGAN DAN IMPLEMENTASI JARINGAN FTTH GPON DI CLUSTER GILIMANUK Mahardika Adnyana, Kadek Dwi; Diafari Djuni, IGAK; Esta Dewi Wirastuti, NMA
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

This research aims to meet the target of building a homepass network of 512 homepasses from PT. PLN ICON PLUS in the North Bali UP3 area sector, namely the Gilimanuk Village area, Melaya District, Jembrana and the use of Huawei Optical Line Terminal (OLT) equipment with a total of 8 ports as well as the use of backbone network access that is already available in the Gilimanuk area. Gilimanuk demographically has an area of 56.01 km2 and consists of residential buildings inhabited by 2,451 families. To accommodate homepass from the Gilimanuk housing complex, this research offers a cascading scheme for Fiber To The Home (FTTH) with Gigabit Passive Optical Network (GPON) technology that is appropriate to use but still pays attention to the quality of the network provided. In determining the feasibility of the network design and determining the appropriate cascading scheme for the Gilimanuk Cluster, the parameters in network design and implementation are focused on measuring the power link budget in theory and implementation, then the rise time budget value in the network optisystem software simulation. The results of this research show that the 1:4 to 1:16 cascading scheme has better FTTH network system feasibility than the 1:8 to 1:8 cascading scheme with a Prx value of -18.42 dBm, which does not exceed the minimum Prx threshold value of the ITU-T G standard. 984, namely -28 dBm, then the rise time budget shows the system rise time value: 0.25537 ns, which does not exceed the maximum rise time limit, namely 0.292 ns, so the 1:4 to 1:16 cascading scheme is feasible to implement.
ANALISIS PERBANDINGAN TOLERANSI KESALAHAN (FAULT TOLERANCE) ROUTING STATIC DAN OSPF PADA JARINGAN HYBRID UNUD Anugrah Br. Ginting, Putri; Diafari, G A K; Indra ER, Ngurah; Wiharta, Dewa Made
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p4

Abstract

A reliable and failure-resistant computer network is an important prerequisite in the modern interconnected environment. This research aims to examine and compare the effectiveness of fault tolerance between two commonly used routing protocols, namely static routing and OSPF (Open Shortest Path First), in the context of hybrid networks at Udayana University (UNUD). This research uses GNS3 to simulate the UNUD network environment. The research method is carried out by implementing static and OSPF routing separately in the GNS3 simulation. After the routing implementation is carried out, the network is tested against various error scenarios to observe how each routing method handles the situation.In this research, the analysis results provide a deeper understanding of the advantages and disadvantages of each routing method. Our findings illustrate that OSPF significantly improves fault tolerance and network availability compared to static routing in complex hybrid network environments.
PERANCANGAN PLTS ATAP DI GEDUNG KANTOR BUPATI JEMBRANA Yusuf Firmansyah, Ahmad; Dwi Giriantari, Ida Ayu; Sukerayasa, I Wayan
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p13

Abstract

According to the Ministry of Energy and Mineral Resources, in the year 2020, Indonesia possessed an electricity generation capacity of 70.96 Gigawatts. Out of this capacity, 35.36% was derived from coal, 19.36% from natural gas, 34.38% from oil, and only 14.96% from Renewable Energy sources. In order to accelerate the adoption of Renewable Energy, in accordance with the Governor of Bali Regulation No. 5 of 2022, there was an encouragement to utilize rooftop Solar Power Generation (PLTS) amounting to at least 20% of the installed electricity capacity or the roof area of both new and existing Government buildings, whether at the Central or Regional levels. Therefore, a rooftop PLTS design for the Jembrana Regency Office Building was essential to support the transition to cleaner energy. The rooftop PLTS design was carried out using the Helioscope software. The rooftop PLTS design for the Jembrana Regency Office Building showed that for the scenario involving the entire roof area, it could generate 174.15 MWh in one year, which translates to 42.51% of the total electricity demand. Meanwhile, for the scenario involving only the North-facing roof, the rooftop PLTS could produce 96.55 MWh in one year, equivalent to supplying 23.57% of the total electricity demand.
RANCANG BANGUN PURWARUPA SISTEM KOMUNIKASI ANTAR KENDARAAN MENGGUNAKAN NRF24L01 MODE SIMPLEX Adi Wiranata, K. N.; Indra ER, Ngurah; Sukadarmika, Gede
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p27

Abstract

This research aims to design and develop a prototype vehicle-to-vehicle (V2V) communication system utilizing the NRF24L01 module, ESP32 microcontroller, and OLED display in simplex mode. The system enables effective and instant communication between vehicles in the Vehicle Ad-Hoc Networks (VANETs) environment. In the implementation, we optimized the power transmission level and data rate to ensure fast and responsive data transmission. We integrated key components, such as the ESP32, NRF24L01, and OLED display, into the hardware design to establish a reliable and seamlessly integrated system. We also designed the prototype to minimize costs. The prototype demonstrates an effective and cost-efficient technical solution for vehicle communication, making it suitable for research and development projects requiring wireless communication in real-world vehicle scenarios. This research aims to positively contribute to advancing technology to support connectivity and safety in future vehicle mobility. The findings of this research can be beneficial for researchers, engineers, and policymakers interested in improving vehicular communication and mobility.
POTENSI PEMBANGKIT LISTRIK TENAGA MIKROHIDRO DENGAN TURBIN KAPLAN PADA SUNGAI MAMBAL Dwi Lasmana, I Kadek Oki; Indra Partha, Cokorda Gede; Arta Wijaya, I Wayan
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p36

Abstract

The Kaplan turbine is a type of reaction turbine that utilizes potential energy to generate motion energy. The Kaplan turbine is very suitable for use in places where the head is low but requires a large discharge. Currently Kaplan turbines are still very little used in Indonesia, especially in Bali. So that it is difficult to obtain specification data relating to Kaplan turbines. Many prototypes are made on a laboratory scale to get maximum results. This study discusses the results of the output voltage, current, power, and efficiency that can be produced by a PLTMH prototype using a Kaplan turbine. This study also discusses the analytical study of the existing hydropower potential, namely, the water flow rate and the height of the water fall (head) of the Mambal River water flow. This prototype test uses a water flow rate of 6 L or 0.006 m^3/s with a guide vane angle of 30 ยบ and a total of 5 runner blades. In the no-load test, the average turbine rotation before being coupled to the generator was 556 rpm, the average turbine rotation after being coupled was 353 rpm. The average result of the largest turbine rotation is 303 rpm, the largest generator rotation result is 499 rpm, the largest generator voltage average result is 5.60 volts, the largest average generator current result is 0.61 Ampere, the result the largest average generator powerKey Words : Prototype of PLTMH, Kaplan Turbine, Water Discharge, Output producedis 1.93 Watt, the largest torque is 0.14 Nm, the largest PLTMH efficiency is 5.1%.
ANALISIS LAJU UAP OLEH BOILER DENGAN KAPASITAS 9 LITER AIR DAN 10KG SAMPAH ORGANIK PADA PLTSa Riyan Bhaskara Surya A, I.B; Indra Partha, Cok Gede; Janardana, I G N
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p4

Abstract

The island of Bali is geographically surrounded by the ocean, therefore its coastal areas are often visited by garbage coming from the sea. Garbage is one of the most serious problems in the coastal areas of the beaches on the island of Bali, Biaung Beach located in Kesiman Kertalangu Village, East Denpasar is one of the beaches that is often visited by garbage from the sea, where the garbage per day reaches 38 kg / day. The purpose of this study was to determine the steam pressure generated by a boiler with a capacity of 9 liters of water and 10 kg of organic waste in a Waste Power Plant (PLTSa). The descriptive quantitative method used in this study is to determine the steam rate coming out of the boiler with 53.26% organic waste moisture content in the PLTSa Prototype using a 13.6 kilogram freon tube and 3 bar vapor pressure, a power of 209 watts is obtained.

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