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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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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 6 Documents
 1 
Search results for , issue "Vol 9 No 4 (2022): Jurnal SPEKTRUM" : 6 Documents clear
PERANCANGAN APLIKASI BASE STATION DALAM SISTEM KOORDINASI ROBOT SEPAK BOLA BERODA DENGAN MULTI THREAD Komang Edy Surya Prabowo; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.756 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p3

Abstract

The Indonesian Wheeled Football Robot Contest (KRSBI Beroda) is one of the divisions of the Indonesian Robot Contest (KRI). At KRSBI Beroda robots are expected to be able to move automatically by using the Base Station as a communication center between robots in the same team. Base Station has a function to forward orders from the referee or RefBox (Referee Box) to the robot. This study aims to add features to the Base Station by displaying the position of two robots in the field in animation using the multi-thread method to facilitate strategy formulation. The result is that the Base Station that is made can display the position of two robots in the field without any errors.
RANCANG BANGUN GEROBAK SORONG SEMI-OTOMATIS BERPENGGERAK MOTOR DC DENGAN MENGGUNAKAN METODE PULSE WIDTH MODULATION Yozi Abdullah Haqiqi; I Made Suartika; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (704.151 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p4

Abstract

The wheelbarrow is a tool for transporting material in mining, plantation, and other areas that is pushed by one person with two rear handles and one wheel in the front. However, its use still requires and relies on a large amount of human power. The workers still have to expend energy to push the wheelbarrow which of course will be very heavy if the load is added in the wheelbarrow. Therefore, it is necessary to add an additional driving force to the wheelbarrow that can help the workers so that they can save their energy and also can make work more efficient. This wheelbarrow will use a DC motor as the driver and use Arduino uno with the PWM method as the control system. In addition, the tool will use a Lithium-ion battery so that it is more durable and can be easily recharged. The battery used has a voltage of 24V and a capacity of 9Ah. This semi-automatic wheelbarrow that uses a dc motor can help work faster up to about 32.5% more efficiently than without using a dc motor. In addition to being more efficient in use, wheelbarrows with dc motors also make it easier for users to use these tools compared to wheelbarrow without dc motors.
RANCANG BANGUN SISTEM MONITORING SUHU COLD STORAGE BERBASIS IOT MENGGUNAKAN WEMOS D1 R2 DI PT. AEROFOOD ACS DENPASAR Diky Wahyu Kusuma Budi; Rukmi Sari Hartati; I Gede Dyana Arjana
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.587 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p5

Abstract

Monitoring temperature and humidity in cold storage is very important to prevent damage to food raw materials. Checking the temperature in the cold storage is carried out every 4 hours with the results manually written on the log sheet by the working staff and also sometimes there are staff who do not close the cold storage door tightly so that it causes an increase in temperature. Therefore an IoT-based cold storage temperature monitoring system is created using Wemos D1 R2 in real time which is very necessary. The design of this prototype uses hardware, namely the WeMos D1 R2 microcontroller because it is based on ESP8266 which can be connected to WiFi, DHT22 temperature sensor, and HC-SR501 PIR sensor. The software used is blynk and google spreadsheet. The results of this prototype design are being able to read the cold storage temperature and humidity properly which can be seen in the blynk application on a smartphone by displaying the temperature and humidity values. This prototype also has a feature that sends notifications to smartphones when the temperature is read more than 5°C and has temperature data stored on Google spreadsheets. The conclusion of this study has succeeded in designing and making a prototype of an IoT-based cold storage temperature monitoring system. The testing of the prototype can work well. The results of applying the prototype to cold storage Room 21 obtained an average temperature of 2.9°C and an average humidity of 86%.
UNJUK KERJA KODE ORTHOGONAL M-SEQUENCE DALAM SISTEM DIRECT SEQUENCE SPREAD SPECTRUM MELALUI KANAL MULTIPATH FA Komang Gede Widi Adnyana; Nyoman Pramaita; I Made Oka Widyantara
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (464.001 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p1

Abstract

Multipath and multi-user interference are the main challenges in wireless communication systems. This has become a driving force for the development of data transmission technology that is focused to overcome these problems, one of which is spread spectrum. Spread spectrum is applied to CDMA technology which has the limitations of MAI, so a spreading code is required with specifications that have a very low cross-correlation value as in the orthogonal m-sequence code. In this study, simulate the orthogonal m-sequence code with a length of 8 chips on a multipath fading channel using the Direct Sequence Spread Spectrum system with aims of assessing the performance of the orthogonal m-sequence code on a multipath fading channel, based on the effect of changes in the number of multipath components. The research method used is a Monte Carlo simulation on simulink with the output data in the form of a graph of the comparison value of BER with Eb/No. The results show that on the flat fading channel with the number of components multipath 1, the BER value of the simulation results is in accordance with the BER theory so that the simulation is valid and can be applied to frequency selective fading channels. In the frequency selective fading channel with the number of multipath components 4,6, and 8, the best performance was shown in the multipath 4 component with the smallest BER value, this was influenced by the ACF and CCF values so that the multipath 4 component had the lowest ISI and interference between users.
DESAIN SIMULASI PERFORMANSI KODE ORTHOGONAL GOLD PADA KANAL MULTIPATH FADING Arzalia Khairunnisa Yasmine; Nyoman Pramaita; N.M.A.E.D Wirastuti
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.614 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p2

Abstract

Improved wireless communication system generate the various advanced technologies, one of which is spread spectrum technique. This technique working by multiplying dots bits information which have a large period with spreading code that have a smaller periode, which makes bit periode will follow the code periode. In order to maximize performance of this technique, an efficient code is required to reduce the occurrence of interference. The purpose of this study was to see how the variation of multipath components affected the work of the orthogonal gold code. This study compares BER vs. Eb/No for multipath components 10, 15, and 20 using code length 32, 8 users, and BPSK modulation. The multipath component 10 exhibits the best BER value, which is impacted by the degree of interference indicated by the size of the ACF value. and CCF on a non-zero shift.
ANALISIS SISTEM PENGAMAN UTAMA UNTUK MENGAMANKAN BUSBAR 150 kV TERHADAP GANGGUAN DI GIS PECATU Made Niken Ayu Larasati Danianto; I Gede Dyana Arjana; Cok. Gede Indra Partha
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.579 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p6

Abstract

GIS (Gas Insulated Switchgear) is a system of connecting and disconnecting the power grid which is packaged in a non-ferrous tube, using gaseous sulfur hexaflouride (SF6) as the insulation medium. The 150 kV of GIS Pecatu is located in Pecatu Village, South Kuta, Badung Regency, Bali Province. This GIS was built to help supply 120 MW of energy because of the load in Badung area, especially Pecatu and Nusa Dua, is increasing. So, it is necessary to know the differential relay current settings when there is a fault of short circuit in GIS Pecatu to produce an effective, selective and reliable safety system. When there is a fault of 11.58 kA the relay will work immediately within 0 SI, this proves that the differential relay with Instantaneous characteristics will immediately command a trip when the fault current has surpass the set value. From the calculation results, the setting of the main safety relay has worked in appropriate with the SPLN standard No. 52-1 1984 for the 150 kV system.

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