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Elektrika
Published by Universitas Semarang
ISSN : 20850565     EISSN : -     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering
Jurnal eLEKTRIKA diterbitkan oleh Jurusan Teknik Elektro, Fakultas Teknik, Universitas Semarang sejak tahun 2009, dan terakreditasi oleh Kementerian Ristekdikti pada tanggal 29 Januari 2009, dengan No. ISSN 2085-0565. Jurnal eLEKTRIKA adalah jurnal open akses dengan pelibatan mitra bebestari (peer-reviewed yang terbit dua kali dalam setahun, Maret dan Oktober.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 12, No 2 (2020): Oktober 2020" : 6 Documents clear
Rancang Bangun Modul Kontrol Alat Terapi Batu Ginjal (ESWL) Dengan Mikrokontroler AT-Mega16 Berdasarkan Sistem Pernapasan Manusia Bayu Wahyudi; Kusuma Adi Cipta; Muhammad Ulin Nuha ABA
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2267

Abstract

Extracorporeal shockwave lithotripsy (ESWL) is the most cost effective treatment option in cases of kidney stones. ESWL uses an energy source called lithotriptor to produce a shock wave that is high in electromagnetic energy in pulses to break down rocks into fine grains of sand and come out naturally with urine. In this study the authors modified the control of the ESWL unit by adding an automatic wave shooting system based on respiration from therapeutic patients using the MPXV7002DP sensor and the ATmega16 microcontroller and applying the 16x2 LCD as a display.The maximum reading capability of this module is 9000 times the active relay, which means that ESWL can shoot as many as 9000 times automatically according to human breathing. This automatic kidney stone therapy module can shoot as many as 3 waves in one breath. Has created a number of inspiration counters and the number of wave shots that ESWL has fired into kidney stone therapy patients.
Analisa Rugi-Rugi Daya Dan Jatuh Tegangan Pada Saluran Transmisi 150 kV GI Pati Bay GI Jekulo Menggunakan ETAP 12.6.0 Bayu Andik Anggoro; Sukarno Budi Utomo; Ida Widihastuti
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2828

Abstract

In the electric power system, the transmission system is a pathway to transmit electrical energy from the generator to the substation or from the substation to another substation which allows power losses and large voltage drops if the transmission length is relatively far and the overload is very high. affect the reliability of the transmission system. Analysis of power losses and voltage drop on the 150 KV high voltage transmission system at the Pati substation to the Jekulo substation. The analysis was carried out by conducting a survey at the research location then doing manual calculations and calculations using ETAP 12.6.0 software. The research method used was that the researcher collected voltage and current data at 10.00 and 19.00 WIB in one month and the transmission system supporting equipment specifications to be simulated in ETAP 12.6.0 from Pati and Jekulo substations in order to make comparisons between manual calculations and ETAP. 12.6.0.The conclusion of this study is the calculation of power losses manual calculation and simulation of ETAP 12.6.0 has a difference of 2.5% with the value of manual calculation power losses of 685.5 KW and the power losses from The simulation results reached 266.6 KW and the calculation of the presentation of power losses in the transmission line of GI Pati - GI Jekulo reached 6.8% exceeding the service percentage variation limit due to losses according to SPLN No. 72 of 1987 a maximum of 5% at least -10%.
Evaluasi Utilitas Bangunan Pada GKB UNISSULA Adhitio Ekatama Putro; Gunawan Gunawan; Ida Widihastuti
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2321

Abstract

 In the construction of multi-storey buildings, every aspect must be considered in accordance with the rules set out in the Act. Article 7 Paragraph 3 of Law 28/02 states that building construction must meet four aspects, namely safety, health, comfort, and convenience. To support the realization of these aspects, it is necessary to have a building utility. The Joint Lecture Building (GKB) of Sultan Agung Islamic University in Semarang, is a building that has 10 floors and is a busy building because it is used by several faculties, such as the PGSD Faculty, Language Faculty, Communication Faculty, and Nursing Faculty. In the operation of the GKB building, there are several complaints that occur in the GKB such as electricity that often goes out, some rooms have less lighting / dark, queues of elevator users are piling up and visually, the GKB building has the potential of being struck by lightning because it has high above average.Seeing these conditions, the authors conducted a study to evaluate the reliability of buildings based on the utility of the building with methods that have been used in other studies, namely the scoring method that is based on visual inspection and by adding measurement methods, and calculations. From these results found the reliability value of the GKB building on the criterion of health scores got a score of 81, the health and comfort criteria scored 99, the ease criterion scored a score of 98. So the reliability of the GKB building got a score of 92 and was included in the unfit category.
Penentuan Kelayakan Tahanan Isolasi Pada Transformator 60 MVA Di Gardu Induk 150 kV Tegal Dengan Menggunakan Indeks Polarisasi, Tangen Delta, Dan Breakdown Voltage Muhamad Firdaus Robbani; Dedi Nugroho; Gunawan Gunawan
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2721

Abstract

A power transformer is electrical power equipment that works to transmit power or electrical power from high voltage to low voltage or on the contrary. In the operation of distributing electricity, the transformer can be said to be the heart of transmission and distribution. In this condition, a transformer is expected to operate optimally according to its function.. If the isolation state of the transformer deteriorates, it can have an impact on operating failure and the most fatal of which is that the transformer is damaged which can cause disturbances in the electrical system. To overcome this, it is necessary to analyze the isolation resistance.This study analyzes the isolation resistance on a transformer using the polarization index, tangent delta and oil breakdown voltage methods to determine the quality of the isolation on the transformer. This study took data at the 150 Kv substation Tegal. The data used include polarization index test data, tangent delta data, bottom oil breakdown voltage test data, and OLTC oil. After the data is obtained, then calculations and analyzes are carried out to obtain accurate results.The test results at the 150 Kv substation Tegal showed the polarization index value with the lowest IP of 1.26 in the primary-ground section and the highest IP of 1.97 in the primary-secondary section is still in good condition. The results of the tangent delta test are still in good condition, only in the CHT mode experienced a negative delta tan deterioration of 0.07%. The result of the average oil test is still suitable for use with 69.9 Kv of bottom oil and 53.3 Kv of OLTC oil.
Pengenalan Pola Lintasan Berbasis Neural Network Pada Prototype Self-Driving Car Leonardo Rudolf Manangka; Herwin Suprijono; Dedi Nurcipto
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2732

Abstract

Self driving cars are an interesting topic to discuss due to the high level of traffic accidents that occur due to human error. Self driving cars are vehicles that can find out about the environment with minimal human intervention. Self driving itself has many development methods such as Light Detection and Ranging (LIDAR), cameras, radars, or a combination of these sensors. This study made a prototype self-driving car using a camera as a sensor and a neural network algorithm for pattern recognition. The pattern recognition in question is the image recognition of the path taken. The data that has been taken will later be converted into a matrix with dimensions of 320x120 according to the image resolution. Then the data will be trained to recognize the path pattern with the proportion of 7: 3 for training accuracy and validation accuracy. The resulting prediction has an accuracy of 76.86% for training accuracy and 75.24% for validation accuracy.
Deteksi Kualitas Kuning Telur Ayam Kampung Menggunakan Ekstraksi Ciri Secara Statistika Orde Satu Berbasis Logika Fuzzy Muhammad Sipan; Rony Kartika Pramuyanti
Elektrika Vol 12, No 2 (2020): Oktober 2020
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v12i2.2783

Abstract

Chicken eggs have become a basic necessity for Indonesians, both for personal consumption and for business purposes. Eggs that are good or quality can be seen based on the yolk. Both those who are only a day old a week or more than two weeks or those that are not suitable for consumption.Quality egg yolks appear brighter in yellow and there are no stripes or other colors and markings in the yolk. Eggs. From this, the author tries to do research on the detection of quality detection of native chicken egg yolk using Order One Statistical Extraction based on Fuzzy Logic. Feature extraction The first order egg yolk image in this study uses various features, namely variance, skewness, cartulation, entropy and mean. Texture measurements in the first order use statistical calculations based on the original image pixel value for the sole purpose of finding the histogram characteristics of the image.The results of this study are the value of the feature calculation in first order statistics to be used to make the decision whether the egg yolk is suitable for consumption or not. This research is expected to be able to provide insight in determining the quality or absence of native chicken eggs. The first step in this research is to look for data in the form of egg yolks from native chickens, after that we take a picture in the form of an image of egg yolk using the same camera and the same distance as well. So that the image results obtained have the same level of precision. From this image, we then look for the first order statistical value which will be used as a reference in determining the quality of eggs using fuzzy logic.

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