Jurnal SPEKTRUM
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.
Articles
677 Documents
<![CDATA[PROTOTYPE ALAT PENGINGAT PENGGANTIAN OLI PADA SEPEDA MOTOR MEMANFAATKAN SMS BERBASIS MIKROKONTROLER ATMEGA-328 ]]>
<![CDATA[Made Bayu Pranata]]>;
<![CDATA[I Gusti Agung Putu Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 2 No 4 (2015): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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<![CDATA[Dewasa ini masyarakat banyak disibukan dalam berbagai rutinitas harian mulai dari pekerjaan kantor, sekolah, rumah tangga dan lainnya. Karena terlalu banyak aktifitas biasanya masyarakat sering melupakan hal-hal kecil salah satunya lupa akan waktu yang tepat untuk melakukan perawatan sepeda motor khususnya dalam penggantian oli. Dari permasalahan tersebut maka munculah ide untuk membuat prototype alat pengingat penggantian oli pada sepeda motor memanfaatkan SMS berbasis mikrokontroler ATmega-328. Pada perangkat mekanik prototype terdapat komponen rotary encoder dan sensor kecepatan yang diletakkan pada velg. Jarak yang sudah ditempuh dan kecepatan putaran roda didapat dari putaran velg. Program delay timer akan menghitung waktu penggantian oli. Pada alat ini terdapat fitur pengiriman SMS terus-menerus serta buzzer terus berbunyi jika pengendara melebihi batas kecepatan. Alat ini bertujuan untuk mengingatkan pengendara sepeda motor dengan mengirimkan SMS tentang waktu yang tepat dalam melakukan penggantian oli serta peringatan jika melebihi batas kecepatan maksimal.]]>
<![CDATA[Studi Analisa Pengaruh Total Harmonic Distortion (THD) terhadap Rugi-Rugi, Efisiensi, dan Kapasitas Kerja Transformator pada Penyulang Kerobokan ]]>
<![CDATA[I Putu Adi Wirajaya]]>;
<![CDATA[I Wayan Rinas]]>;
<![CDATA[I Wayan Sukerayasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i02.p17
<![CDATA[Kerobokan feeder supply electrical energy in the area of Kerobokan. This feeder supplies 67 distribution transformers that serve a variety of customers with nonlinier electrical loads. Nonlinier electrical loads cause harmonics which adversely affect customers and power system equipment, especially distribution transformers. In Kerobokan feeder, only 3 (4.5%) of the 67 transformers has THDi content that according with the IEEE 519-2014 standard and 64 (95.5%) of the 67 transformers has a high THDi content and exceed the IEEE 519-2014 standard. For this reason, the power losses, efficiency, and work capacity of the transformer are analyzed due to the effect of THDi. This study uses a direct measurement method in all transformers in the Kerobokan feeder and simulation on the ETAP Powerstation program. The results of the analysis showed that total power losses without being affected by THDi for all transformers were 49.4 kW and after being affected by THDi were 591.71 kW. The highest THDi content is in the KA 0992 transformer is 24.8% which results in an increased in power losses is 12.02 kW or 12.02% of its capacity and a decreased in efficiency is 12.66% and has a decreased in work capacity is 19.9%. While the smallest THDi content is found in the DB 449 transformer is 6.8% which results in an increased in power losses is 2.2 kW or 0.88% of its capacity and a decreased efficiency is 1.01% and has a decreased in work capacity is 2.7%.]]>
<![CDATA[Rancang Bangun Monitoring Level Muka Air Tanah Di Perkebunan Lahan Gambut Menggunakan SMS Sebagai Pengirim Informasi Data Berbasis Mikrokontroler ]]>
<![CDATA[I Wayan Eka Prastia]]>;
<![CDATA[I Wayan Arta Wijaya]]>;
<![CDATA[I Wayan Sukerayasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 1 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i01.p09
<![CDATA[The fires of peatlands on oil palm plantations are very vulnerable to occur in the dry season. Fires will arise due to a decrease in the surface of the water resulting in the top layer of peatland becoming dry. Manually monitoring ground level is very difficult. The solution is to make a remote water level monitoring prototype in order to be able to regulate irrigation on peat land and make the system open and close the irrigation door during the dry season and when the rainy season arrives. The design of groundwater level monitoring uses a program installed on the Arduino Uno microcontroller.Water level data is sent by prototype via GSM SIM 800L network, 8 level conditions that have been determined from a depth of 15 cm multiples of five so on to 55 cm. HC-SR04 Ultrasonic Sensor is a detector for water level. Data can be accessed at any time via SMS by sending "Check" to the prototype. The results of the tests performed indicated that the tool can function in accordance with the design and send information as well as receive monitoring orders.]]>
<![CDATA[RANCANG BANGUN APLIKASI RESERVASI SERVICE UNTUK BENGKEL SEPEDA MOTOR BERBASIS WEB ]]>
<![CDATA[I Gusti Ngurah Agung Widhiananda]]>;
<![CDATA[I Made Arsa Suyadnya]]>;
<![CDATA[Komang Oka Saputra]]>
<![CDATA[ Jurnal SPEKTRUM Vol 4 No 2 (2017): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2017.v04.i02.p13
<![CDATA[Motorbike repair shops are one of the industries which provide services for repairs, tunings, or even providing availability of parts to the customer. Punctuality is one of the most important factor to every users that uses this kind of service. Nowadays, most of the repair shops provide several means to book and to make a reservation for most customer's intended services. But, they are done manually by the management, either by direct visits or by call. This will gradually become a tedious task and requires meticulous book keeping to track a huge numbers of reservations. This research was done as an attempt to develop a responsive web-based system, starting from its basic infrastructure analysis, built in PHP with standard MySQL database system. The result of this development is intended to cater and accommodate the needs of customers for reserving services ahead as well as to find the nearest, most suitable shops for their appointments automatically. All of this system functionalities are working as intended according to black box testing method.]]>
<![CDATA[SETTING RELE JARAK PADA SISTEM SUTT 150 KV GI KAPAL – GI PADANG SAMBIAN MENGGUNAKAN METODE ADAPTIVE NEURO-FUZZY INFERENCE SYSTEM (ANFIS) ]]>
<![CDATA[M. Nordiansyah]]>;
<![CDATA[I.G.D Arjana]]>;
<![CDATA[W. Setiawan]]>
<![CDATA[ Jurnal SPEKTRUM Vol 1 No 1 (2014): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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<![CDATA[Sistem proteksi pada saluran transmisi mempunyai peranan yang sangat penting untuk mengamankan saluran transmisi dari gangguan yang terjadi, salah satu jenis pengaman utama yang digunakan adalah rele jarak. Berbagai metode dapat digunakan untuk mendapatkan nilai setting rele jarak, salah satunya adalah dengan metode ANFIS. Metode ANFIS digunakan untuk mendapatkan nilai setting rele jarak pada sistem SUTT 150 kV GI Kapal - GI Padang Sambian. Struktur ANFIS yang dilatih menggunakan model ANFIS Takagi-Sugeno, dengan 3 jenis fungsi keanggotaan, serta dengan 2 dan 3 fuzzy set untuk masing-masing jenis fungsi keanggotaan. Pemodelan pasangan data masukan-keluaran yang digunakan adalah pemodelan dengan masukan 1 data pelatihan, dan masukan 3 data pelatihan untuk 1 data target. Berdasarkan simulasi peramalan nilai setting rele jarak yang dilakukan, menghasilkan MAPE peramalan ANFIS untuk masukan 1 data pelatihan sebesar 5,671 %, sedangkan nilai MAPE yang dihasilkan dari masukan 3 data pelatihan dengan 1 data target menghasilkan nilai MAPE sebesar 0,377 %.]]>
<![CDATA[ANALISA SISTEM PENGAMAN GENERATOR PLTDG DI PT INDONESIA POWER UNIT PEMBANGKITAN BALI ]]>
<![CDATA[Putu Wira Asta Dharma]]>;
<![CDATA[Cok Gede Indra Partha]]>;
<![CDATA[Ngakan Putu Satriya Utama]]>
<![CDATA[ Jurnal SPEKTRUM Vol 5 No 2 (2018): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2018.v05.i02.p18
<![CDATA[The need for electrical power, especially in Bali, is increasing every year. Therefore, the Bali’s Generating Unit of PT Indonesia Power has replaced the Diesel-powered Electrical Generator Pembangkit Listrik Tenaga Diesel (PLTD) with ‘the Gas-powered Diesel of Electrical Generator Pembangkit Listrik Tenaga Diesel Gas’ (PLTG). Such a replacement causes the change in the generating capacity power which affects the setting and system of protection. This current study was intended to analyze the relay protecting system using the short connecting simulation method in the ETAP program in order to be able to identify the maximum and minimum disturbing current, the working time setting and the OCR (Over Current Relay) and GFR (Ground Fault Relay) protecting coordination. Based on the result of simulation and calculation, it can be concluded that the OCR took 1.18 seconds to work, faster than the GFR, which took 2.25 seconds to work.]]>
<![CDATA[PEMANFAATAN MEDIA SOSIAL SEBAGAI OTENTIFIKASI DAN OTORISASI AKSES KE JARINGAN WIFI ]]>
<![CDATA[IGM.W.S. Handdy]]>;
<![CDATA[I.G.A.K Diafari]]>;
<![CDATA[N. Indra]]>
<![CDATA[ Jurnal SPEKTRUM Vol 3 No 2 (2016): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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<![CDATA[Pemanfaatan media sosial sebagai otentifikasi dan otorisasi akses ke jaringan wifi membantu penyedia layanan hotspot untuk mendapatkan data bagi setiap pengunjung yang menggunakan layanan hotspot, setiap data yang didapat akan tersimpan pada server database. Pada penelitian ini, akan menguji system otentifikasi pemanfaatan media sosial untuk mengetahui waktu yang diperlukan dalam proses otentkasi dan otorisasi yang terjadi. Tahap penelitian, penulis melakukan beberapa skenario pengujian, yang bertujuan untuk mengetahui waktu dari setiap proses otentifikasi dan otorisasi dari setiap skenario pengujian, selain itu penulis melakukan pengambilan alur data proses otentifikasi dan otorisasi, sehingga dapat dibandingkan dengan waktu. Skenario yang dipergunakan dalam pengujian diantaranya data yang terdaftar dan data yang tidak terdaftar pada database. Selain itu penulis menggunakan data salah dalam proses pengujian, yang bertujuan untuk mengetahui waktu tunggu jika terjadi kesalahan input data.]]>
<![CDATA[PENERAPAN GAMIFICATION PADA SISTEM INFORMASI MANAJEMEN RUANG BACA ]]>
<![CDATA[Risqa Purma Pratama]]>;
<![CDATA[Komang Oka Saputra]]>;
<![CDATA[Duman Care Khrisne]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 3 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i03.p21
<![CDATA[The Reading room is a room that is used by visitors to search and study the library materials. The reading room has an important role in the learning and teaching process on campus. The Faculty of Engineering Studies of Udayana University have a reading room that is managed in a conventional way. In addition to these problems, students ' interest in visiting the Reading room is also very low. Using information technology with the Gamification method can be used to resolve the issue. This system can handle reading room management and provides convenience for users to access the reading room. The form of Gamification to be applied is the point given to the user against interactions with the Reading Room management information System. Users will be given problems that have the form and difficulty in each level, correct answers will get points and wrong answers will get a reduction of points. The points gained will be accumulated so that the level of users can be found in the leaderboard, with the mechanisms in the system expected to borrow and read books in the Reading room can increase. The Reading Room Management Information System uses 3 tests: Black Box, System usability scale, and the last of Gamification testing. Based on the test results using the black box method, the system has a function that is declared successful. Based on the test result system usability scale obtained score 70.12 expressed acceptable. In addition to the Gamification testing, a score of 3.98 is categorized by agreeing with the application]]>
<![CDATA[RANCANG BANGUN SISTEM INFORMASI MANAJEMEN INVENTARIS PADA JURUSAN TEKNIK ELEKTRO FAKULTAS TEKNIK UNIVERSITAS UDAYANA ]]>
<![CDATA[I Putu Wahyu Eka Suryawan]]>;
<![CDATA[I Made Arsa Suyadnya]]>;
<![CDATA[Ida Bagus Alit Swamardika]]>
<![CDATA[ Jurnal SPEKTRUM Vol 2 No 3 (2015): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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<![CDATA[Saat ini kegiatan pendataan barang di Jurusan Teknik Elektro (JTE) Unud masih dilakukan secara manual dan akan membutuhkan waktu lama dalam pengerjaannya terutama dalam proses pengecekan kondisi barang. Dalam perancangan SIM Inventaris JTE Unud ini, diterapkan sistem inventaris berbasis elektronis yang dapat memberikan kemudahan dalam proses pendataan barang untuk mempersingkat waktu dalam pendataan barang tersebut, dan meningkatkan kinerja sistem inventaris yang ada di JTE Unud, serta dalam menyimpan dan pencarian data menjadi lebih mudah dan efisien. Sistem ini menggunakan metode pengujian Black Box dan hasilnya berfungsi dengan baik tanpa adanya bug dan secara fungsional sistem sudah dapat digunakan dan menghasilkan output yang diharapkan.]]>
<![CDATA[Prototype Pengaman Rumah Dari Bahaya Pencurian Berbasis Mikrokontroller Melalui Komunikasi Bluetooth ]]>
<![CDATA[Meutia Safitri]]>;
<![CDATA[I Gusti Agung Pt. Raka Agung]]>;
<![CDATA[I Gst A. Komang Diafari Djuni]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i02.p08
<![CDATA[The negligence of residents and the lack of a house security system are the causes of the rampant cases of theft. Technological developments are increasingly rapid, making technology can be applied as a security system at home. This can be a solution to these problems. In this study a home security system was developed in the form of a prototype. This study uses a microcontroller that can be controlled using mobile devices via bluetooth communication. The prototype consists of a keypad to enter a password as a substitute for a home key, a PIR sensor as a detection of human body heat movements, and a buzzer as an alarm. The results of this study are that the prototype has been realized where the servo motor has been able to open and lock by entering the correct password. Setting ON / OFF lighting, display information on the LCD, and ON / OFF PIR sensor from an Android mobile phone via Bluetooth communication are in accordance with the plan.]]>
