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Jurnal SPEKTRUM

spektrum
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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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PEMBANGKITAN CITRA TIME EXPOSURE MENGGUNAKAN FILTER MEDIAN Haris Chandra Agustina; I Made Oka Widyantara; I.G.A.K Diafari Djuni H
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Time exposure (timex) image is a type of image generated from image acquisition at acertain time or image acquisition with different exposure criteria, the advantage of timex imageis High Dynamic Range which can help provide details in a digital image processing. Toproduce a good timex image, a method is needed that is able to create a timex image fromeither a video or photo source. There are several methods used to produce timex images,namely Gradient-Based Synthesized, Multi-Exposure Image, and Median Filter. In this study,the three methods are compared in producing timex images with input in the form of imageswith over exposure and low exposure as well as video images. For testing the timex image, theHistogram, Standard Deviation, Variance, Mean, Median, and Mode parameters are used.Based on the results of research conducted on timex images with the Median Filter method, thestandard deviation value is 0.0739 and the variance value is 0.0054 where this value indicatesthat the intensity distribution on the median timex filter image has a wider dynamic range thanthe other two methods. The comparison of the timex image with the fps variation shows that thehigher the fps used, the better the timex image.

REDISAIN SISTEM PEMBUMIAN DI HOTEL X JIMBARAN Khana Eland N.A; I.G.N Janardana; I.W Arta Wijaya
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Due increases develop the electric power system, the more effective security system is needed.One of the security systems is the earthing system at Hotel X Jimbaran. After takes measurement theaverage measurement results of 1.14 ? ~ 2.47 ? at four different location points that cause the flow ofovercurrent or overvoltage to electrical equipment. This study purpose to improve the existing earthingsystem to achieve earthing resistance <1? according to IEEE standards.This research method consist ofseveral stages, first, survey location to measure the amount of soil resistance (R) to calculate the value ofsoil resistivity (?) then calculate the value of earthing resistance according to the type of earthing systemto achieve an earthing resistance <1 ?, including the Vertical One Earthing Electrode System at Depth Z,Horizontal Earthing One Electrode System, Two Earthing Electrode System with S>L conditions, TwoEarthing Electrode Earthing System with S<L conditions, Plate Earthing System and Grid-Rod EarthingSystem.The calculation analysis results design of the earthing system with earthing resistance <1? each fault location obtained different results. Building 1000 reccomended to choose plate earthing system inwetsoil conditions with the result of earthing resistance 0,9594?; Building 2000 reccomended to choose gridrod earthing system in dry soil conditions with the result of earthing resistance 0,84?; Building 3000reccomended to choose grid-rod earthing system in dry soil conditions with the result of earthingresistance 0,976?; and Ballroom reccomended to choose grid-rod earthing system in wet soil conditionswith the resultof earthing resistance 0,865?. Each location according to the analyzed earthing systemrecommendations, the most economical prices were calculated below IDR 10,000,000,- (Ten MillionIndonesia Rupiah Currency), at Building 1000 with a total cost of IDR.4.034.000,-; Building 2000 with atotal cost of IDR.6.698.650,-; Building 3000 with a total cost of IDR.7.448.200,-; and Ballroom with a totalcost of IDR.7.352.200,-.

RANCANG BANGUN MODUL PRAKTIKUM SISTEM EMBEDDED BERBASIS RASPBERRY PI (MODUL 2: PENERAPAN SISTEM SEDERHANA) I Putu Pawesi Siantika; Pratolo Rahardjo; I Gusti Agung Putu Raka Agung
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Embedded systems play a very important role in various fields so that several universities,especially Udayana University in the Electrical Engineering Study Program, Faculty ofEngineering have included embedded systems + lab courses. However, the availability ofsupporting facilities for activities in the lab is not yet available as it should be. Based on this, inthis research, a practicum module for an embedded system based on Raspberry Pi will bedesigned and made (Module 2: implementation of a simple system). This practicum module hasthree experiments, namely a lamp control system and a 5 V DC motor equipped with an LDRsensor (experiment 1); monitoring the water level using the HC-SR04 sensor module and theheight data is displayed on a 16 x 2 LCD (experiment 2); Human movement detection uses theHC-SR501 sensor module with output in the form of audio that is channeled to the speaker, theimage display by the 0.96 inch OLED module, and the rotation of the LDR servo shaft(experiment 3). The results obtained in the three experiments are that all systems worksuccessfully with the following conditions: The load on the relay turns on when the LDR sensorcondition is covered with black cloth, the load on the relay goes out when the LDR sensorcondition is left unobstructed and the LDR sensor is illuminated by an LED flashlight. The LEDindicator lights up according to the condition of the water level reading by the HC-SR04 sensormodule. The HC-SR501 sensor module successfully detects the movement of objects in theform of humans at a distance of 1 m, 1.5 m, and 3 m.

PENGARUH PENAMBAHAN SISTEM IOT RASPBERRY PI TERHADAP KECEPATAN CETAK DAN TINGKAT PRODUKTIVITAS OPERATOR 3D PRINTER REPRAP I Putu Ade Chandra Priyatna; I G A P Raka Agung; Yoga Divayana
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Most of desktop-scale 3D printers are based on the open-source design of the ReplicatingRapid Prototyper (REPRAP) community. One aspect that can be developed in REPRAP 3Dprinters is the addition of Internet of Things (IoT) technology. Therefore, a Raspberry Pi-based IoTsystem that can be implemented on a REPRAP 3D printer is developed. The IoT system allowsthe 3D Printer to connect into internet network and has a website-based interface. This study aimsto compare the impact of Raspberry Pi based IoT systems implementation on the 3D printingspeed and to measure productivity level of 3D printer operator. Testing is done by printing fourobjects when the IoT system has not been added to the 3D printer and printing four objects whenthe IoT system has been added to the 3D printer. In testing, the data on the printing time of eachobject is obtained, this data is used to compare the print speed between before and after the 3Dprinter was added to the IoT system. Furthermore from testing, the data of time required byoperators to prepare and monitor the performance of 3D printers is also obtained, this data is usedto compare the productivity levels of 3D printer operators before and after adding the IoT system.Based on the test results, it was found that 3D printers with IoT systems have faster printpreparation times than 3D printers without IoT systems. However, 3D printers with IoT systemshave a longer machine time than 3D printers without IoT systems. The operator productivity levelfor 3D printers with IoT systems is higher than 3D printers without IoT systems.

APLIKASI NUTRINEEDS DALAM PENENTUAN KEBUTUHAN KALORI HARIAN BAGI PENDERITA DIABETES MELITUS Siti Ayu Oktavianti; Yoga Divayana; I Gusti Agung Putu Raka Agung
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

In this journal, an analysis of the NutriNeeds application is carried out. The Nutrineedsapplication is the result of a study that aims to determine daily calorie needs for people withdiabetes mellitus. The level of accuracy of the NutriNeeds application will be compared with theBroca method in determining the daily calorie requirements for people with diabetes mellitus.The NutriNeeds application is designed with the mamdani fuzzy inference system and androidstudio, which uses 7 inputs in the fuzzy inference system, namely gender, male BBI, femaleBBI, age, BMI, physical activity, stress factors, and produces an output, namely calories daily.The NutriNeeds application requires data input, namely gender, weight, height, age, andphysical activity, which will display daily calorie results and meal schedules. The data in thisstudy were 5 pieces of data on patients with diabetes mellitus. Based on the comparison of dailycalories generated by the NutriNeeds application by calculating daily calories using the Brocamethod, the results of the calculation of the percentage of accuracy obtained a MAPE value ofthe NutriNeeds application of 1.1% which is classified as very accurate.

PERANCANGAN DAN SIMULASI PLTS ATAP 1 KWP MENGGUNAKAN HELIOSCOPE I Gede Civavisna Brahma; I Nyoman Satya Kumara; Ida Ayu Dwi Giriantari
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Solar Power Plant (PLTS) as one of the renewable energy sources that is being focused on itsdevelopment. This article discusses the design and simulation of the performance of a 1 kWp rooftopsolar power plant using a Helisocope. The input data required by the Helioscope is PLTS technicalspecifications such as solar panel technology, inverter type, number and type of modules selectedand land area. The location data required by the PLTS system includes the coordinates, the type ofroof of the building, the environment around the PLTS and meteorological data. The 1 kWp PLTS roofsystem designed at the location that the author uses uses 7 pcs Canadian Solar 195 Wp panels, 1pcs 1 kW AEC inverter, installed on the roof of the building facing north, and connected to the PLNnetwork via a net meter. This 1 kWp rooftop PLTS is capable of producing an average daily averageof 5,48 kWh, 41,07 kWh weekly, 164,29 kWh monthly, and annual 1971,5 kWh. Energy productionvaries by an average of 8% per month with the minimum production in January of 135,1 kWh and thehighest in July of 184,5 kWh. The designed 1 kWp PLTS roof produces a performance ratio of 73,6%with the irradiation received in a year reaching 1859,2 kWh/m2. The initial investment required to builda 1 kwp PLTS roof is IDR. 20.000.000.

PENGARUH DEBIT AIR TERHADAP? PUTARAN?TURBIN?DAN?DAYA?OUTPUT? YANG?DIHASILKAN?PROTOTYPE PLTMH?DENGAN?TURBIN?KAPLAN Ravinda Ariestya Pamungkas; I Wayan Arta Wijaya; I Gusti Ngurah Janardana
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Kaplan turbine is suitable turbine to use in the place that have small water fall (head)but need big water discharge. The problem from this turbine is the turbine need high waterdischarge to test the related parameters but it is too difficult to do because the water dischargeis not constant in the river. Based on the problems described, it is necessary to make a hydropower plant prototype using a Kaplan turbine with a laboratory scale so that it can obtainmaximum output result on a micro hydro power plant. The Method of analysis used is bycalculating the rimary data obtained. Prototype testing in this study uses water discharge thatvaries including 9 liter/s, 10 liter/s, 12 liter/s, 14 liter/s and 16 liter/s. The maximum outputobtained is when the water discharge is 16 liter/s which produces a turbine rotation of 228,3 rpmbefore the generator is coupled and 172,5 rpm after the generator is coupled, the generatorrotation is 902,5 rom, the generator voltage is 9,07 Volts, the generator current is 0,56Amperes, generator power is 5,09 Watt, torque is 0,28 Nm, and the efficiency occurs 1,62%.Based on the result of the study, the maximum output obtained is from the water discharge 16liter/s which is the biggest water discharge because an increase in the value of water dischargewill cause the micro hydro power plant performance to increase.

PrENGARUH.V/ARIASI.JUrMLAH.SUmDU-TERHAfDAP DiAYA OUTPUgT1PrADA2PROTObTYPE PEMBAyNGKIT2LIShTRIK> TENAxGA[MIKRO4HIuDRO0(PLrTMH) DEtNGAN9 MENGGUtNAKAN;TUoRBIN’KAPLAN I Komang Gede Darma Yasa; I Wayan Arta Wijaya; I Made Suartika
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The Kaplan5Turbin is6a typepof turbine-that.can’be used=as an initial propolusion in thePLTMH system. The;Advantage; of this;Kaplan’Turbin is that it.can be;applied to;a low head with ahigh water flow rate..This study/aims;to’analyze’the’performance’of the Kaplan turbin with 5 variationsof the number of blades’consisting’of 3,4,5,6 and[7blades. The[maximum[rotational[speed[obtained bythe turbine with the;number;of;blades;5 with,an,average,value 216,8 rpm,before coupling with thegenerator. The,maximum/generator.rotational.speed that.can be.obtained.on a.turbine. that has thenumber of blades of is 865,9 rpm before .being loaded.and.749,9 rpm for the9 after load9condition .The voltage ,9current , and power9generated0are 8,7980volts, 0,419amperes,8and 3,59 wattsrespectively with a maximum torque 0,206 Nm, and efficiency of 1,53%

RANCANG BANGUN MODUL PRAKTIKUM SISTEM EMBEDDED BERBASIS RASPBERRY PI (PENGONTROLAN DASAR LED, LED DOT-MATRIX, DAN SEVEN SEGMENT DISPLAY) Muhammad Abdul Hadi; Pratolo Rahardjo; I Putu Elba Duta Nugraha
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Embedded system is microprocessor-based systems that are used to perform certainfunctions. Embedded systems learning is very much needed, especially for students ofElectrical Engineering, Faculty of Engineering, Udayana University. This is evidenced by theexistence of a new course, namely the Embedded + Lab System. To support the convenienceof practicum in the laboratory, in this study, an Embedded+Lab System practical guide will bedesigned and built by utilizing the Single Board Microcomputer Raspberry Pi. It is hoped thatthis Embedded+Lab System practical guide will be useful for Electrical Engineering students,Faculty of Engineering, Udayana University. This research carried out several basic designsthat will be used in the Embedded System module 1 practical experiment, namely the design ofa Light Emitting Diode (LED) control, LED DOT-Matrix, and seven segment display. The designof each control system will generally be divided into two parts, namely hardware design andsoftware design. The results of this study are a box 1 system embedded practical module andpractical guides, as well as the design of each control system, all of which work well.

RANCANG BANGUN SISTEM MONITORING PADA HIDROPONIK NFT (NURTIENT FILM TEHCNIQUE) BERBASIS IOT Lindu Pamungkas; Pratolo Rahardjo; I Gusti Agung Putu Raka Agung
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The use of hydroponics is an effective way to carry out farming activities without theneed for large tracts of land. Hydroponics requires extra supervision to be able to produceplants with good quality. There are three main parameters in hydroponics, namely the amountof dissolved nutrient content, the pH level in water, and the water suhue level. To provideconvenience in conducting surveillance, this research designed an IoT-based NFT hydroponicmonitoring system. The use of TDS sensors, pH sensors, and temperatur sensors DS18B20 inthis study are used to measure any changes that occur in the three parameters. Sensor datawill be processed by Arduino Mega 2560 and sent to Firebase databases via NodeMCUESP8266 which is connected to the internet network, so users can supervise anytime andanywhere through the android mobile application.

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Nyoman Gunantara

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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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Bali

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Nyoman Gunantara

Contact Email gunantara@unud.ac.id

Phone +6281558140279

Journal Mail Official gunantara@unud.ac.id

Editorial Address Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315

Location Kota denpasar, Bali INDONESIA

Abstract

Abstract

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Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Nyoman Gunantara

Contact Email
gunantara@unud.ac.id

Phone
+6281558140279

Journal Mail Official
gunantara@unud.ac.id

Editorial Address
Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315

Location
Kota denpasar,

Bali

INDONESIA