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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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RANCANG BANGUN SISTEM SMART HOME PADA RUMAH KOS BERBASIS INTERNET OF THINGS Gede Prananda Putra; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Technological developments in the field of electronics to date have made the humanmindset advanced in the application of electronic equipment. One example of its development isremote control of electrical equipment. Many people use these developments as a means offacilitating life activities in solving problems that occur. The use of the internet in life can beused as an example in the use of technological developments. The internet is one of thecommunication media that has many benefits in increasing effectiveness, work efficiency, andmonitoring. The internet can be used as a transmission medium for control and monitoringsystems. With the internet, one can control electrical equipment and monitor the condition of thehouse. The concept originated from the Internet of Things or IoT. IoT is a concept where alltools and services in the system are connected to each other using internet media. Based onthese problems, a smart home system was created that functions as control of electricalequipment, smoke detection, monitoring of temperature and humidity in the room. Themonitoring and control system is integrated with Android applications and based on the Internetof Things.

RANCANG BANGUN APLIKASI KOMUNITAS MENDONGENG BERBASIS ANDROID Agus Wisnu Kusuma Nata; I Made Arsa Suyadnya; Duman Care Khrisne
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The culture of giving fairy tales to children has an important role in the development oftheir thinking patterns. This culture is starting to be abandoned and wants to be preserved againby the Bali Storytelling community. The community regularly holds or fills an event withstorytelling activities. This study designs and builds an android-based mobile application for thestorytelling community in managing community information such as managing information onstorytelling activities, managing activity participants, managing fairy tale content, recruitingcommunity members, and managing collaboration invitations aimed at the storytellingcommunity. The application is built with the Flutter framework as the application frontend andthe Laravel framework as a REST API which acts as an intermediary for data flow betweenapplication and database. The results of the black box test show that the application can run allfunctionality well and the results of the System Usability Scale test, the application gets a scoreof 73,375 which indicates the application is classified as good and can be accepted by the user.

SISTEM MONITOR BUDI DAYA SARANG BURUNG WALET BERBASIS ESP32-CAM DILENGKAPI APLIKASI TELEGRAM Dani Maulana; I Gusti Agung Putu Raka Agung; I Putu Elba Duta Nugraha
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Swiftlet nest farming is one of the businesses found in Indonesia due to its bigeconomic value. Nest quality at the time when harvest is able to impact the selling price ofswiftlet nest. Farmers usually monitor the swiftlet nest by checking the nest directly in thebuilding, this matters because the swiftlet is shocked. Monitoring is needed for checking thephysical condition of the swiftlet nest. This research will make a prototype hopefully useful toswiftlet nest farmers as a reference to increase nest quality with high economic value. Theresearch has been done on software and hardware design by ESP32-CAM and Arduino IDEsoftware for making the source code. The result from research of a monitoring system onswiftlet nest farming based ESP32-CAM equipped with telegram is able to send commandsmenu to telegram, capturing photo of swiftlet nest, turning on flash and turning off flash onESP32-CAM. The research has been realized successfully as design.

ANALISIS SISTEM KELISTRIKAN PADA PEMBANGKIT LISTRIK TENAGA SURYA ON-GRID KAPASITAS 25 KWP DI BADAN PERENCANAAN PEMBANGUNAN DAERAH (BAPPEDA) PROVINSI BALI I Kadek Juniarta; I Nyoman Setiawan; Ida Ayu Dwi Giriantari
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

In the 2020 fiscal year, the Ministry of Energy and Mineral Resources of the Republic ofIndonesia provided PLTS On-Grid grants to the Province of Bali as many as 10 PLTS locationsin Denpasar City. One of them is in the Regional Development Planning Agency (BAPPEDA) ofBali Province with an installed capacity of 25 kWp which is connected to the PLN network.BAPPEDA Bali is an example of the NRE Development Program and the Regional Medium-Term Development (RPJMD) that supports the PV mini-grid sector. This research wasconducted to determine the performance of the PLTS electrical system and to simulate theresults of PLTS production using Helioscope software so that it can compare the simulationresults of 2 scenarios with real conditions to determine the level of effectiveness in savingelectricity bills and the factors that influence the results of PLTS energy production. The resultsshowed that the potential for electrical energy generated for a year from the simulation ofScenario 1 and Scenario 2 was 38.90MWh and 39.07MWh. It is known that the real energyproduction from July to December 2021 is 18,083 kWh with the simulation results of scenario 1and scenario 2 from July to December 2021 which are 19,810 kWh and 20,015 kWh. Thedifference between real energy production and the simulation results in scenario 1 and scenario2 is 1,727kWh with a percentage of 8.72%, and 1,931kWh with a percentage of 9.65%. Thepercentage of savings obtained for 6 months in 2021 compared to 6 months in 2020 is 56.42%with a saving value of Rp. 18,783,953.

ANALISIS OPERASI POMPA CHILLER MENGGUNAKAN FIXED SPEED DRIVE DAN VARIABLE SPEED DRIVE (STUDI KASUS : FOUR SEASON HOTEL JIMBARAN) Hasan Dedy Sudono; I N. Satya Kumara; WG. Ariastina
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Four Season Jimbaran Hotel is one of the hotels in Bali using a cooling system which isusually called the water chiller. The electrical energy consumption in Four Season Hotel is oneof the factors that increase the use of electrical energy in which the star delta system is stillused to switch on the pump. Along with the electricity rate which keeps increasing every year,the electrical energy consumption in Four Season Hotel can increase the operational cost. It isconcluded that one of the largest electrical energy consumptions is water chiller pump. Chillerpump is a pump used for pushing water flow towards chiller condenser and Air Handling Unit(AHU) when the water chiller system is still active. Starters of the chiller pump used in FourSeason Jimbaran Hotel are inverter and star delta. The method used in conducting research was calculation of the electrical energy requirement and cost in two pumps set by star delta atan initial frequency of 50Hz in water chiller pump 160 TR, compared with inverter system withthe decrease of frequency by 5Hz (45Hz) in water chiller pump 230 TR. Monitoring wasperformed by analyzing the consumption of electrical energy (kWh), temperature (°C), andhumidity (%) in every pump set by every system. In these two pumps, energy consumption(kWh) and cost were compared in daily, weekly, and monthly needs. From the result ofresearch, in inverter system, the frequency reduction by 5Hz in water chiller pump 230 TR cansave electrical energy of 117,120 kWh and the cost of IDR 130,471,680 in the next five years.The comparison analysis of operation of the chiller pump supplied with star delta (fixed speeddrive) with an inverter (variable speed drive) has a difference energy consumption of 117,120kWh in both systems and the difference cost is Rp. 130,471,680.00 in next 5 years.

RANCANG BANGUN DATA LOGGER MONITORING VIBRASI PADA MOTOR LISTRIK 6,3 KV BERBASIS IOT SECARA REAL TIME DI PLTU JERANJANG Putu Agus Satriya Guna Adnyana; Rukmi Sari Hartati; I Gede Dyana Arjana
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

As a power plant industry, PLTU Jeranjang OMU (Operation and Maintenance Unit) owned oneof 6.3 kV nominal voltage induction motor that has critical characteristic that drives the waterpump into the boiler room which always has to operate. This motor has been equipped withtemperature sensor in real time that can monitor the temperature of bearing motor. However,manual control is still applied in vibration monitoring. It is done by taking the vibration data oncea week, and there is no deviation data found in real time. The result of this study shows that theprototype of IoT-based vibration monitoring data logger that is designed using the blynkapplication obtained the average of sensor deviation of 2%. Alarm notification of each sensorsdeliver "warning" if the vibration value indicates ? 4,5-70 mm/s and alarm notification delivers"emergency" if the vibration value indicates ? 7,1 mm/s in concordance with the ISO 10816-3vibration standard. Although, the performance of sensor data storage has successfully storingthe data with 8 GB microSD card, then will be fully charged in 4629 days or 154 months and 3days.

PENGHITUNG JUMLAH ORANG MASUK DAN KE LUAR BERBASIS IoT DILENGKAPI PENGUKUR SUHU TUBUH I Putu Indra Pramana Yoga; I Gusti Agung Komang Diafari Djuni H; Nyoman Pramaita
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

As a precaution against the spread of the Covid-19 virus in public facilities, thegovernment requires to measure temperature and limit the number of people in order to preventnew clusters, especially in crowded centers. To reduce this problem, a prototype of the numberof people entering and leaving through the IoT-based door will be made using an ultrasonicsensor HCSR-04 equipped with a body temperature meter. This system works from reading thetemperature sensor value MLX90614, when the temperature is above 37oC then the doorremains closed and when the temperature is below 37oC the door will open, ultrasonic sensor 1is placed on the entrance side and ultrasonic sensor 2 is placed on the exit side, if the sensor 1receives one input, the system will automatically add a variable number of visitors, if sensor 2receives one input, the system will automatically reduce the variable number of visitors, andwhen the room is full of 10 people, the servo motor will close the door automatically, informationon body temperature and total person data will be displayed on the LCD and the Blynkapplication and sent to the MySql webserver database in real time. The prototype system thathas been made is capable of detecting body temperature and counting the number of peopleentering and leaving the door according to the design.

IMPLEMENTASI SISTEM PEMANTAUAN SUHU DAN KELEMBABAN UDARA BERBASIS IOT PADA PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYANA I Nyoman Agus Junaedi; Anak Agung Ngurah Amrita; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Plant factory is a technological development in agriculture that is able to overcome the decline in productivity in the agricultural sector caused by limited agricultural land. The concept of the plant factory itself is the application of a good environmental condition for plants to grow indoors which is easy to control so that they are not affected by the weather outside. The temperature and humidity in the plant factory must be monitored and controlled in real time with an Internet of Things (IoT) technology that utilizes internet connectivity to connect and transmit data. The system is designed using two microcontrollers, namely Arduino nano which functions as an input reader for temperature and humidity sensors, namely the DHT22 sensor, while ESP32 functions as a module for sending DHT22 sensor data to the Blynk via an internet connection to be stored in the database and can be accessed via the smartphone user. The ESP32 also functions as an automatic control of air humidity and air conditioning (AC) control remotely via a smartphone.

STUDI ANALISA PENGHEMATAN ENERGI DI GEDUNG DEWAN PERWAKILAN RAKYAT DAERAH KABUPATEN BADUNG I Wayan Sastrawan; I Gede Dyana Arjana; Cok Gede Indra Partha
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Today, excessive use of electrical energy will certainly cause energy wastage, given the energy crisis that has hit all countries, the government must have made efforts to save energy use. In 2019, the energy consumption of the Badung Regency DPRD Building was 41.8 kWh/m2 month, when compared to the Minister of Energy and Mineral Resources Regulation No. 13 on an Air-conditioned Building, which was 14 kWh/m2 month, the DPRD Building was included in the wasteful category. Based on these problems, efforts are needed to evaluate the use of electrical energy in the DPRD Building by means of energy conservation. The purpose of the study was to identify the potential for saving electrical energy that can be applied to the Badung Regency DPRD Building. The research method uses a descriptive quantitative approach where the results of calculations and measurements are then described and compared with Indonesian national standards on energy conservation. The results of the research show that the potential for saving electrical energy can be done by replacing the standard Split AC into a low watt AC where the electrical energy savings are obtained by 11.62% or a budget savings of Rp. 21,068,468.-

RANCANG BANGUN SISTEM PEMANTAU SUHU BEARING MOTOR UNTUK POMPA SIRKULASI AIR BERBASIS IOT I.G.W. Artana; W.G. Ariastina; I.N.S. Kumara
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The importance of monitoring the temperature of the motor bearing on the water circulation pump on a regular basis to prevent pump operation failures due to bearing. The operator monitors the temperature bearing manually using a Flir measuring instrument with potential hazards in the work area namely slipping, falling and electrocution. On this basis, IoT based bearing monitoring system for circulation water pump in real time is very necessary.The design of this prototype uses hardware such as ESP32 microcontroller and MLX90614-BCC sensor, while the software used are blynk and google spreadsheet. The MLX90614-BCC sensor calibration uses a linear regression method to adjust the sensor value to the Flir TG167 so as to minimize deviations in temperature readings.The results of this prototype are able to read temperature bearing well which are integrated with the blynk on smartphones by displaying temperature values in the form of numbers and graphs and also equipped with a notification. The prototype that was built had an average measurement deviation of 0.32% on the DE sensor and 0.3% on the NDE sensor. Storage of temperature data on google spreadsheet with the amount of data that can be stored as much as 1,666,666 data. The conclusion of the research is that it has succeeded in designing and manufacturing a prototype IoT based bearing monitoring system for circulation water pump. Testing the performance of the prototype can work well. The results of the prototype test on bearing for the water circulation pump showed that DE and NDE bearing temperatures were still below 55 °C and there was no notification on the smartphone which indicates the motor bearing is still in normal condition.

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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

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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

Abstract

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