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All Journal REKA ELKOMIKA Bulletin of Electrical Engineering and Informatics Jurnal Teknik Elektro ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JETT (Jurnal Elektro dan Telekomunikasi Terapan) JURNAL KAJIAN TEKNIK ELEKTRO Jurnal Tekno Insentif TELKA - Telekomunikasi, Elektronika, Komputasi dan Kontrol Indonesian Journal of Electrical Engineering and Computer Science REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat
LITA LIDYAWATI
Institut Teknologi Nasional (ITENAS) Bandung
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Implementasi Reflector Antena Wajanbolik Pada Layanan EVDO (Evolution Data Optimized) BIMA, BIMA; LIDYAWATI, LITA; DARLIS, ARSYAD RAMADHAN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 1, No 1: Published January - June 2013
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v1i1.1

Abstract

ABSTRAKAntena merupakan perangkat yang memiliki peranan yang sangat penting dalam sistem komunikasi tanpa kabel (wireless). Pada penelitian ini akan diimplementasikan reflektor antena wajanbolik yang beroperasi pada frekuensi CDMA 2000 1x EVDO 1900 MHz. Antena ini menggunakan  reflektor dari wajan, dengan waveguide dari pipa paralon yang dilapisi dengan lakban alumunium, dan penerima sinyal menggunakan USB modem adapter. Antena ini ditujukan untuk menjadi media bantu  dalam  memperkuat  penerimaan sinyal  EVDO dan memaksimalkan dan kecepatan transfer data. Antena ini memberikan gain sebesar 15,530 dB berdasarkan pengukuran dan 15,156 dB berdasarkan teoritis. Pengujian menggunakan wajanbolik menunjukkan adanya peningkatan level sinyal modem yang terendah sebesar 4 dB pada pengukuran dengan kondisi indoor di siang hari serta tertinggi sebesar 19 dB pada pengukuran dengan kondisi outdoor di malam hari. Hasil dari pengujian pun menunjukkan peningkatan kecepatan transfer data rata – rata sebesar 42 KBps sampai dengan 269 KBps dibandingkan pengukuran tanpa wajanbolik.Kata kunci: Reflektor, Waveguide, Wajanbolik, USB adapter, EVDO.  ABSTRACTThe antenna is a device that has a very important role in wireless communication systems (wireless). In this research will be implemented wajanbolik reflector antenna which operates at frequencies of CDMA 2000 1x EVDO 1900 MHz. This antenna uses a reflector of the pan, with the waveguide of the pipe is coated with aluminum duct tape, and a signal receiver using a USB modem adapter. This antenna is intended to be a media aids in strengthening the EVDO and signal reception to maximize data transfer speeds. This antenna give a gain of 16.015 from measurement dBi and 15.156 dBi based on theory. Tests using wajanbolik showed an increase in the level of modem signals a low of 4 dB in measurement with indoor conditions during the day and 19 dB at the peak of measurements with outdoor conditions at night. Results of testing also showed an increase in average data transfer rate is 42 KBps up to 269 KBps compared to measurements without wajanbolik.Keywords:  Reflector, Waveguide, Wajanbolic, USB adapter, EVDO.
An Analysis of Distance Extension Method in Visible Light Communication (VLC) Performance KRISTIANA, LISA; DARLIS, ARSYAD RAMADHAN; DEWI, IRMA AMELIA; LIDYAWATI, LITA; ARCHANDHIKA, HEGAR REFALDY
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 1: Published January 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i1.218

Abstract

ABSTRAK A Visible Light Communication (VLC) adalah teknologi yang menawarkan konsep inovatif karena VLC menerapkan cahaya tampak untuk mentransmisikan informasi dari satu titik ke titik lain. Tantangan utama dalam penerapan VLC adalah pelemahan sinyal cahaya tampak karena faktor jarak dari titik sumber ke titik tujuan. Penelitian ini berfokus pada metode untuk merancang dan menerapkan pemancar dan penerima VLC pada media udara. Dengan membandingkan berbagai macam tipe LED, pengukuran yang didapatkan menunjukkan bahwa pemancar dan penerima VLC dapat ditingkatkan kemampuannya sehingga mencapat jarak maksimum 8.5 meter dengan menggunakan LED HPL. Kata kunci: Visible Light Communication, VLC Transceiver, Distance Extension Method, Light Emitting Diodes (LEDs).  ABSTRACT A Visible Light Communication (VLC) offers the innovative concept in telecommunication since it implements visible lights to transmit information from one point to other points. The main challenge in VLC is the attenuation due to the distance from source to destination. This research focuses on extension method to design and implement the VLC transceiver in an air medium. By comparing the real measurement of several types of LEDs, the distance of VLC transceiver can be extended up to 8.5 meters by applying HPL LED. Keywords: Visible Light Communication, VLC Transceiver, Distance Extension Method, Light Emitting Diodes (LEDs).
Perancangan Dan Implementasi Antena Yagi 2.4 GHz Pada Aplikasi WIFI (Wireless Fidelity) PRATAMA, BUDI; LIDYAWATI, LITA; DARLIS, ARSYAD RAMADHAN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 1, No 1: Published January - June 2013
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v1i1.35

Abstract

ABSTRAKPenggunaan teknologi komunikasi dengan menggunakan kabel kini sudah tergantikan oleh teknologi komunikasi tanpa kabel, dimana kebanyakan pengguna menggunakan perangkat access point yang memiliki jangkauan pancaran terbatas karena pola radiasi omnidirectional, sehingga diperlukan antena yang mempunyai pola radiasi directional untuk jangkauan pancaran yang lebih terarah. Antena yagi merupakan salah satu yang dapat digunakan untuk mengatasi masalah ini. Dalam penelitian ini, antena Yagi yang dirancang dapat diaplikasikan pada sistem WLAN. Hasil dari implementasi didapatkan bahwa antena Yagi dapat bekerja pada frekuensi kerja WLAN 2,4 GHz. Dan selainitudiperoleh level kuat medan dengan rata-rata peningkatan penguatan antena yagi terhadap antena omni sebesar 12,1 dB. Disamping itu diperoleh gain antena yagi sebesar 16 dB sedangkan hasil simulasi sebesar 10 dB, beamwidth vertikal 250 dan horizontal 260, dan bandwidth antena 150 MHz, Pada penelitian ini hasil yang didapatkan dibandingkan dengan hasil dari software vistumbler dan SuperNEC 2.9.Kata kunci: Access point, antenna yagi, directional, vistumbler, 2,4 GHz, SuperNEC 2.9ABSTRACTThe use of communication technologies by using cable technology has now been replaced by wireless communication, whichmost usersuse theaccess point device that has a limited range due to beam omnidirectional radiation pattern, so that the required antenna that has a directional radiation pattern to reach a more focused beam. Yagi antenna is one that can be used to overcome this problem. In this study, Yagi antenna is designed to be applied in WLAN system. Results obtained from the implementations that Yagi antennas can work at the operating frequency of 2.4 GHz WLAN. And besides it is obtained strong level terrain with an average increase of the antenna yagi antenna gain of 12.1dB omni. Besides, obtained yagi antenna gai nof 16 dB, while the simulation result sat 10 dB, 250 vertical and horizontal beamwidth of 260, and a bandwidth of 150 MHz antennas, In this study,the results obtained are compared with the results of the software vistumbler and SupeNEC 2.9.Keywords: Accesspoint, yagi antennas, directional, vistumbler, 2.4 GHz, SuperNEC 2.9
Color Filter Identification for Bidirectional Visible Light Communication DARLIS, ARSYAD RAMADHAN; LIDYAWATI, LITA; JAMBOLA, LUCIA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 6, No 2: Published May 2018
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v6i2.303

Abstract

ABSTRAKSaat ini, cahaya tampak dimanfaatkan oleh manusia hanya sebagai penerangan saja. Akan tetapi, beberapa penelitian telah membuktikan bahwa cahaya tampak dapat dimanfaatkan pula pada sistem komunikasi, yang dinamakan Visible Light Communication (VLC). Pada penelitian ini, sebuah metoda menggunakan color filter diidentifikasi dalam mengimplementasikan sistem bidirectional pada teknologi VLC. Dengan adanya penelitian ini, sebuah sistem bidirectional Visible Light Communication (Bi-VLC) dapat diimplementasikan dengan menggunakan color filter tertentu yang dipasangkan pada posisi uplink dan downlink. Sinyal informasi berupa sinyal audio ditansmisikan melalui VLC transmitter (Tx) yang dipasang color filter dan diterima oleh color filter pada VLC receiver (Rx) setelah melalui media cahaya. Pengujian menunjukan bahwa sistem telah dapat melewatkan sinyal pada frekuensi audio dengan jarak maksimum dari sistem adalah 2,3 m. Sedangkan pasangan color filter yang memiliki kinerja paling baik untuk BI-VLC adalah Azure (Tx) dengan Charteuse Green (Rx), Charteuse Green (Tx) dengan Charteuse Green (Rx), dan Rose (Tx) dengan Charteuse Green (Rx).Kata kunci: Bidirectional, Visible Light Communication (VLC), Color Filter, AudioABSTRACTCurrently, visible light are utilized by humans as illumination only. However, several research have proven that visible light can also be used in communication systems, called Visible Light Communication (VLC). In this research, a method of using color filters was identified for bidirectional systems on VLC technology. With this research, a bidirectional Visible Light Communication (Bi-VLC) system can be implemented using a specific color filter paired in uplink and downlink mode. The audio signal as information is transmitted through a VLC transmitter (Tx) installed by a color filter and received by the color filter on the VLC receiver (Rx) after going through the light media. The result shows that the system has been able to pass the signal at the audio frequency with the maximum distance of the system is 2.3 m. While the best performance of color filter pair for BI-VLC is Azure (Tx) with Charteuse Green (Rx), Charteuse Green (Tx) with Charteuse Green (Rx), and Rose (Tx) with Charteuse Green (Rx).Keywords: Bidirectional, Visible Light Communication (VLC), Color Filter, Audio
Bi-Directional Data Communication using Visible Light Technology for Underwater Environment LIDYAWATI, LITA; DARLIS, ARSYAD RAMADHAN; JAMBOLA, LUCIA; PRIBADI, ADITYA ARIF
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 1: Published January 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i1.217

Abstract

ABSTRAKPengembangan VLC (Visible Light Communication) dapat diimplementasikan ke dalam air. Pada penelitian ini dirancang sistem komunikasi menggunakan cahaya tampak untuk komunikasi dua arah di lingkungan bawah air. Sistem dirancang untuk mengirimkan sinyal digital dengan pengukuran jarak menggunakan filter warna. Terdapat dua link di bagian pemancar dan penerima. Untuk membedakan kedua link tersebut, data dari generator sinyal 3 kHz akan diaplikasikan pada link 1 dan data dari pembangkit sinyal 4 kHz akan diaplikasikan pada link 2. Berdasarkan hasil pengujian, sistem menerima data secara optimal pada link 1 dengan jarak 50 cm dengan tegangan keluaran (Vout) 4,32 Vpp, dan frekuensi keluaran (fout) 3,121 kHz. Hasil pengukuran pada link 2 didapatkan tegangan keluaran sebesar 5,28 Vpp dan frekuensi keluaran (fout) sebesar 4,021 kHz. Pengukuran pada link 1 dengan filter warna biru didapatkan tegangan rata-rata sebesar 5,46 Vpp dan frekuensi keluaran (fout)) sebesar 3,136 kHz. Sedangkan pengukuran link 2 dengan filter warna merah didapatkan tegangan rata-rata 5,11 Vpp dan fout 4,054 kHz.Kata kunci: color filter, bidirectional, data, UVLC ABSTRACTThe development of VLC (Visible Light Communication) can be implemented into underwater. In this research, we design a visible light communication system for two-way communication in the underwater environment. The system is designed to transmit digital signals with a distance measurement using a color filter. There are two links in transmitter and receiver part. To distinguish between those two links, data from the signal generator of 3 kHz will be applied on link 1 and data from the the signal generator of 4 kHz will be applied on link 2. The distance measurement system can receive the data optimally on link 1 with the distance of 50 cm, an output voltage (Vout) of 4.32 Vpp, and output frequency (fout) of 3.121 kHz. The result measurement on link 2 obtains an output voltage of 5.28 Vpp and output frequency of 4.021 kHz. The measurement on link 1 which applied the blue color filter obtains the average voltage of 5.46 Vpp and the output frequency (fout) of 3.136 kHz, while on link 2 which applied the red color filter obtains an average voltage of 5.11 Vpp and fout of 4.054 kHz.Keyword: color filter, bidirectional, data, UVLC
Implementasi Visible Light Communication (VLC) Pada Sistem Komunikasi DARLIS, ARSYAD RAMADHAN; LIDYAWATI, LITA; NATALIANA, DECY
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 1, No 1: Published January - June 2013
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v1i1.13

Abstract

ABSTRAKPerkembangan teknologi telah menunjukkan peningkatan yang cukup signifikan, terutama untuk bidang komunikasi. Hal ini terbukti dengan banyaknya media komunikasi baik itu nirkabel dan kabel. Pada penelitian ini dimanfaatkan cahaya tampak sebagai media dalam sistem komunikasi, dimana selama ini cahaya hanya digunakan sebagai penerangan saja. Visible Light Communication (VLC) adalah sebuah teknologi komunikasi yang memanfaatkan pancaran cahaya tampak dari lampu pada sistem komunikasi. Sistem komunikasi visible light ini terdiri dari pemancar dan penerima. Pemancar terdiri dari Light Emitting Dioda, audio transformator dan baterai, dan pada penerima terdiri dari solar cell dan photodioda, amplifier dan catu daya. Hal-hal yang dapat mempengaruhi hasil output sistem komunikasi adalah jarak, terang cahaya lampu pemancar dan cahaya luar. Pada penelitian ini, komunikasi menggunakan VLC dapat dilakukan pada jarak pengiriman data sebesar 2,5 m dan dengan range frekuensi 600 Hz sampai dengan 45 kHz dimana data dapat disalurkan dengan baik.Kata kunci: Visible light, Sistem komunikasi, Light Emitting Dioda, solar cell, photodioda.ABSTRACTTechnological developments have shown a significant increase, especially in the field of communication. This is proved by the many communications media using both wireless and wired. This study utilized the visible light as a medium of communication system, which has been used as an illumination light only. Visible Light Communication (VLC) is a communication technology which utilize visible light emitted from the lamp in the communication system. The visible light communication system consists of a transmitter and receiver. The transmitter consists of a Light Emitting Diode, audio transformer and battery, and the receiver consists of a solar cell and a photodiode, amplifier and power supply. Things that can affect the output of the communication system is the distance, bright light and outdoor light. In the research, the results that obtained from this study is the data transmission distance of 2.5 m and a frequency range of 600 Hz to 45 kHz data can be routed properly.Keywords:  Visible light, Communication systems, Light Emitting Dioda, solar cell, photodioda.
Challenges of implementing protection systems in smart grids: a review Anwari, Sabat; Fauziah, Dini; Lidyawati, Lita
Indonesian Journal of Electrical Engineering and Computer Science Vol 37, No 2: February 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v37.i2.pp715-729

Abstract

Based on the emergence of increasingly advanced technology, the conventional power grid can be upgraded to a smart grid by adding bidirectional communication, computer algorithms, and equipment that uses artificial intelligence (AI). A smart grid is a revolution in the current electricity network that can control the two-way generation and transmission process by utilizing an intelligent system so that the distribution of electric power can be handled optimally and in real time. The challenge of the smart grid is that there are distributed generators and microgrids that must be controlled in real time with rapidly changing loads. To meet these criteria, several points are proposed, i.e., finding an effective procedure to construct self-healing capability; developing a protection system based on AI; and proposing a systematic procedure to realize self-healing and protection systems with the help of a multi-agent system (MAS). Multi-agent systems are one of the AI approaches. Each agent can work independently and can also communicate with one another and with other devices on the network. Agents used as models can be classified into several categories, such as grid component agents, distributed resource agents, end-user agents, failure control agents, data analysis agents, and graphical visualization agents.
Training on Arduino Uno-based Smart Home Installation at SMK Al Falah Dago Anwari, Sabat; Sawitri, Kania; Rustamaji, Rustamaji; Lidyawati, Lita; Siswanto, Wahyu Dwi; Ramdhani, Teguh; Latif, Mochamad Fazri Abdul
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 6, No 2 (2025): Reka Elkomika
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v6i2.186-195

Abstract

Understanding smart home technology is increasingly important as automation and IoT become integral parts of modern living and industry. Arduino is a microcontroller that is widely used in practical technology applications, including smart home technology. Smart home systems are computer-based systems that provide comfort, safety, security, and energy savings automatically. They can be programmed via a computer connected to the internet and can manage electrical equipment that can be controlled, monitored, or accessed remotely. To connect Arduino to the internet, the ESP8266 is used. The ESP8266 is a low-cost Wi-Fi microchip with built-in TCP/IP networking software and microcontroller capability. The Arduino system for education and learning at SMK Al Falah Dago is based on an ESP8266 microcontroller embedded in the Arduino Uno Smart Home Installation for connecting to cellphones, relays, lights, and fans as controlled electronic devices. SMK AL Falah Dago is a vocational high school that offers a program in electrical engineering scope, so this training is crucial to equip students with the necessary expertise to design, install, and maintain smart home systems, preparing them to meet the demands of the evolving technological landscape.
Counseling on Transformer Learning Activities at SMK Kartika XIX Bandung Jambola, Lucia; Darlis, Arsyad Ramadhan; Lidyawati, Lita; Fauziah, Dini; Susana, Ratna
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 6, No 2 (2025): Reka Elkomika
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v6i2.154-161

Abstract

Comprehending transformers is essential due to their critical function in contemporary electrical systems, including power distribution, battery charging, and diverse technological applications. This counseling aimed to enhance the educational program and deepen the understanding of SMK Kartika XIX-1 Bandung students concerning the operational principles of transformers. The employed approaches encompass the provision of resources, demonstrations, simulations, and evaluations. The results indicated that prior to the counseling, 100% of students had not participated in a transformer simulation. Following the simulation, 50% of students comprehended the concept of a transformer. This coaching is for students to comprehend the fundamental theory of transformers and to apply this information practically, so enhancing their readiness to confront workplace challenges.
Co-Authors Adisty Hanny Asri Adisty Hanny Asri AGITA SYAIMI PUTRI UTAMI AKMAL, MULIA EZA Alfin Fernando Tamba ANITA PURNAMA SARI ARCHANDHIKA, HEGAR REFALDY Arif Fahrizal Arsyad Ramadhan Darlis ARSYAD RAMADHAN DARLIS BIMA BIMA, BIMA BUDI PRATAMA, BUDI DANI RUSIRAWAN DECY NATALIANA Deden Nur Rokhman DEWI, IRMA AMELIA DWI ARYANTA EDI YUSUF, EDI Fauziah, Dini FAZAR GUNTARA PRAJA GEMA ALFARISI DERI HEIFAT AHMAD ABDULLAH HUSAENI, DZIKRI FACHRI JAPE ATHAN BANGUN Kania Sawitri KRISTIANA, LISA Latif, Mochamad Fazri Abdul LUCIA JAMBOLA M.ICHWAN M.ICHWAN Muhammad Aluh Narisha Kalya Mahsa NURUL WULANDARI PAULINE RAHMIATI, PAULINE pribadi, aditya arif RAISA MUKHTARETA Ramdhani, Teguh RATNA SUSANA Rea Ramada Jayandanu REGINA RIYANTIKA ROVAN NUGRAHA RUSTAMAJI RUSTAMAJI SABAT ANWARI Satria Ilma Romadoni Siswanto, Wahyu Dwi TUTUN JUHANA Yanuary, Tio Hanif Yuli Sunarti ZUL RAMADHAN