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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
Education
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Articles 17 Documents
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Search results for , issue "Vol. 12 No. 6 (2024)" : 17 Documents clear
ANALISIS PERBANDINGAN PATCH ANTENA MIKROSTRIP BINTANG 24 DIFREKUENSI 2.4 GHZ DAN 5.8 GHZ PADA JARINGAN WIFI Rafif, Muhammad Alif; Purnomo, Muhammad Fauzan Edy; Kurniawan, Dwi Fadila
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Wi-Fi (Wireless Fidelity) merupakan salah satu standar komunikasi nirkabel yang paling populer di pasaran. Teknologi ini banyak digunakan baik di perkantoran, kampus, kafe, dan tempat umum lainnya. Di Indonesia, untuk keperluan Wi-Fi sudah dialokasikan dalam ISM band pada frekuensi 2.4 GHz dan 5.8 GHz.Untuk membantu proses transimisi data biasanya menggunakan antena. Antena memiliki peran sebagai pengirim dan penerima gelombang elektromagnetik yang berisi informasi-informasi oleh pengguna. Perancangan antenna mikrostrip bintang 24 bertujuan untuk menemukan formula antenna microstrip yang dibutuhkan oleh teknologi Wi-Fi. Pada penelitian ini akan merancang antenna microstrip patch bintang 24 untuk Wi-Fi yang bekerja pada frekuensi 2.4 GHz dan 5.8 GHz. Perangkat lunak yang digunakan dalam merancang antenna yaitu CST Studio Suite 2021 dengan menggunakan bahan substrat FR-4. Dari hasil simulasi antenna patch bintang 24 2.4 GHz memiliki nilai return loss-26.78 dB, VSWR 1.09, bandwidth 520 MHz, gain 4.46 dBi, impedansi 55.08 ohm dan pola radiasi ke segala arah. Dari hasil simulasi antenna patch bintang 24 5.8 GHz memiliki nilai return loss -41.05 dB, VSWR 1.01, bandwidth 1820 MHz, gain 4.35 dBi, impedansi 50.89 ohm, dan pola radiasi ke segala arah. Dari hasil pengukuran antenna patch bintang 24 2.4 GHz memiliki nilai return loss -21.74 dB, VSWR 1.17, bandwidth 2960 MHz, gain 4.31 dBi, impedansi 58.92 ohm, dan pola radiasi ke segala arah. Dari hasil pengukuran antenna patch bintang 24 5.8 GHz memiliki nilai return loss-20.22 dB, VSWR 1.21, bandwidth 2640 MHz, gain 4.19 dBi, impedansi 60.79 ohm, dan pola radiasi ke segala arah. Antena patch bintang 24 2.4 GHz menunjukkan performa yang lebih baik untuk aplikasi jaringan Wi-Fi dibandingkan antenna patch bintang 24 5.8 GHz. Kata Kunci: Komunikasi Nirkabel, Wi-Fi, Antena microstrip patch bintang 24, Performansi antena
OPTIMIZATION OF CHANNEL PERFORMANCE AND CAPACITY ON OPENBTS USING USRP N210 Prapanca, Muhammad Eksya; Kusmaryanto, Sigit; Kurniawan, Dwi Fadila
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Indonesia, as the largest archipelagic country in the world, with an area of 2 million square kilometers and consists of 17,500 islands, as well as a population of around 250 million people. Facing challenges in the development of telecommunications infrastructure, especially in remote areas, Indonesia faces difficulties in providing equitable telecommunications access, especially in remote areas. Although most villages and sub-districts have been covered by BTS signals, some still experience weak signal constraints or do not get a signal at all. Alternative solutions such as OpenBTS, an open-source software project, are becoming relevant in this context. OpenBTS can help address infrastructure challenges by providing telecommunications services such as phone calls and SMS at lower implementation costs. However, it should be noted that the use of OpenBTS can also face challenges such as delays in service, especially in Non-Line-of-Sight (NLOS) conditions.The purpose of this study is to design an OpenBTS telecommunication network using an Ubuntu 14.04.6-based USRP N210 device. Then improve the quality of use by optimizing the OpenBTS service and testing its reliability in various operational scenarios, including the use of SMS andphone call services.Keywords: GSM, OpenBTS, USRP, SMS, Telephone, Delay
Pengaruh Perbesaran Jumlah Elektroda Terhadap Probabilitas Tegangan Tembus pada Dielektrik Minyak Menggunakan Sumber Tegangan Tinggi AC Verdiansyah, Muhammad Akmal Zahran; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Tegangan tembus merupakan fenomena acak yang dapat menyebabkan kerusakan listrik. Salah satu komponen dalam sistem tenaga listrik adalah kawat penghantar dengan nilai resistansi yang kecil yang dapat mengurangi rugi-rugi daya. Salah satu cara untuk memperkecil nilai resistansi tersebut adalah dengan memperbesar luas penampang pada kawat penghantar atau memperbanyaknya yang dapat disebut juga hukum perbesaran luas atau enlargement law. Hal ini tentu akan berpengaruh terhadap probabilitas akan terjadinya breakdown voltage. Pada penelitian ini akan diuraikan mengenai pengaruh perbesaran jumlah elektroda terhadap probabilitas tegangan tembus pada dielektrik minyak menggunakan sumber tegangan tinggi AC. Elektroda yang digunakan dalam pengujian adalah eletroda batang-batang yang terbuat dari bahan stainless steel. Pengujian tegangan tembus dilakukan sebanyak 25 kali untuk mendapatkan nilai probabilitas tegangan tembus dengan perhitungan menggunakan software Microsoft Exel. Jarak antar elektroda yang digunakan besarnya sama pada setiap variasi perbesaran yaitu 2 mm. Dieletrik yang digunakan adalah dieletrik cair yaitu menggunakan minyak Shell Diala B. Pengambilan data arus bocor dilakukan tidak dengan terjadinya tembus menggunakan variasi tegangan 1 kV, 3 kV, dan 5 kV pada setiap variasi elektroda. Pengujian arus bocor diperlukan untuk mendapatkan nilai resistansi pada setiap perbesaran jumlah elektroda. Penelitian ini dilakukan di Laboratorium Tegangan Tinggi, Departemen Teknik Elektro, Fakultas Teknik, Universitas Brawijaya. Untuk simulasi medan listrik dilakukan dengan menggunakan software FEMM 4.2 dengan variasi perbesaran jumlah elektroda 1 pasang, 2 pasang, 3 pasang, 4 pasang, dan 5 pasang. Hasil simulasi medan listrik menunjukkan bahwa pada kelima variasi elektroda memiliki distribusi medan listrik yang merata. Sedangkan pada pengujian arus bocor nilainya meningkat apabila elektroda mengalami perbesaran. Selanjutnya dilakukan perhitungan nilai resistansi yang nilainya menurun apabila elektroda mengalami perbesaranjumlah sesuai dengan hukum ohm yang berarti nilai tegangan tembus juga akan menurun. Selanjutnya pada pengujian tegangan tembus, diperoleh bahwa probabilitas tegangan tembus meningkat jika elektroda mengalami perbesaran jumlah. Artinya saat elektroda mengalami perbesaran jumlah, maka kemungkinan terjadinya tembus akan semakin meningkat. Untuk penelitian selanjutnya disarankan untuk lebih menambah variasi jarak sela, menggunakan jenis dielektrik minyak yang berbeda, dan melakukan penelitian dengan variasi perbesaran elektroda serta jenis elektroda yang lainnya.Kata Kunci: Tegangan tembus, perbesaran jumlah, probabilitas, minyak Shell Diala B
Analisis Kinerja RoF-OFDM (Radio Over Fiber Orthogonal Frequency Division Multiplexing) Berbasis FBG (Fiber Bragg Gratings) pada Frekuensi 3,5 GHz Bhaswara, Adrian; Partiansyah, Fakhriy Hario; Mustofa, Ali
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Penelitian ini menganalisis kinerja sistem Radio over Fiber (RoF) berbasis Orthogonal Frequency Division Multiplexing (OFDM) dengan menggunakan Fiber Bragg Gratings (FBG) pada frekuensi 3,5 GHz. Sistem RoF-OFDM berbasis FBG diimplementasikan menggunakan software OptiSystem21 dan dianalisis berdasarkan nilai Bit Error Rate (BER), Error Vector Magnitude (EVM), dan Signal to Noise Ratio (SNR). Hasil penelitian menunjukkan bahwa penggunaan FBG secara signifikan meningkatkan kinerja sistem RoF-OFDM dengan nilai BER, EVM, dan SNR yang lebih baik dibandingkan dengan sistem tanpa FBG. FBG efektif dalam mengatasi dispersi kromatik pada fiber optik, sehingga membantu menjaga kualitas sinyal dan meningkatkan jarak transmisi. Nilai BER terkecil adalah 0,00310905612244898 yang tidak memenuhi standar yang ditetapkan. Nilai EVM terkecil pada konfigurasi tanpa menggunakan FBG masih memenuhi standar dengan nilai 3,59949590143922%. Adapun untuk nilai EVM terbesarmaupun terkecil pada konfigurasi menggunakan FBG masih memenuhi standar dengan nilai masing-masing 5,58703607941613% dan 2,94081094510999%. Sedangkan untuk SNR, nilai terbesar dari konfigurasi menggunakan dan tanpa FBG masing-masing adalah 96,97505 dB dan 96,170954 dB. Keywords: RoF-OFDM, FBG, EVM, BER, SNR, Optisystem.
RANCANG BANGUN ALAT BANTU NAVIGASI BAGI PENYANDANG TUNANETRA MENGGUNAKAN ESP CAM DAN SENSOR TOF DENGAN METODE IMAGE PROCESSING Kurniawan, Beni; Nurussa’adah, n/a; Rahmadwati, n/a
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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The sense of vision plays a crucial role in daily activities, with 80-85% of information being received through sight. Visually impaired individuals face challenges in mobility and accessing information, particularly because aids such as canes cannot effectively detect or classify objects. According to data from WHO (2019) and the Indonesian Ministry of Health (2018), millions of people worldwide, including in Indonesia, experience visual impairments. This study designs a navigation aid for visually impaired individuals using an ESP Cam and a ToF sensor integrated with an ESP32-S3 microcontroller to detect and classify objects around the user. Testing results show high detection accuracy for backgrounds (99%) and stairs (100%), but improvements are needed for detecting humans (33.3%) and chairs (25%). The ToF sensor successfully detected distances with a low average error (0.1 cm) and a small standard deviation (0.78 cm), making the device reliable in supporting the mobility of visually impaired individuals.Keywords: Visually Impaired, Assistive Device, ESP Cam, ToF Sensor, Image Processing
REDUKSI THD MENGGUNAKAN POWER FACTOR CORRECTION (PFC) BOOST CONVERTER DENGAN MODE CCM Sari, Widy Kartika; Djuriatno, Waru; Rusli, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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This study discusses the application of Power Factor Correction (PFC) boost converter in Continuous Conduction Mode (CCM) to reduce Total Harmonic Distortion (THD) in a single-phase power system. Non-linear loads commonly used in electronic devices cause harmonic distortion that has a negative impact on power quality. By utilizing a PFC boost converter, this study aims to achieve THD reduction according to the IEEE 519-2014 standard. Testing was carried out using simulations on the Simulink Matlab R2021a software to compare a single-phase rectifier circuit and a single-phase rectifier circuit PFC boost converter with voltage and current control. The results of the simulation show that the application of the PFC boost converter successfully reduces THD significantly to below 5% at certain loads. From the results of all tests, PFC can reduce harmonic distortion,improve power efficiency and waveform quality, and show significant differences in the performance of single-phase rectifier circuits with and without PFC.Keywords: Single Phase Rectifier, Power Factor Correction (PFC), Boost Converter, Total Harmonic Distortion, Matlab R2021a
ANALISIS DAN IMPLEMENTASI RANGKAIAN RCD SNUBBER PADA RANCANG BANGUN DC-DC FLYBACK CONVERTER Fernando, Bagas; Djuriatno, Waru; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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DC-DC Converters are essential components in modern power systems that convert DC voltage from one level to another. These converters are used in various applications, ranging from electronic devices to industrial needs. One commonly used topology is the DC-DC flyback converter due to its simple design, although it often faces voltage spikes caused by parasitic inductance that can damage the MOSFET. This study designs an RCD snubber circuit to address these voltage spikes. The snubber circuit consists of a resistor, capacitor, and diode installed on the primary winding of the flyback converter transformer. Testing results indicate that the RCD snubber successfully reduces voltage spikes, despite some power dissipation in the resistor. Overall, this circuit effectively protects components from high voltage spikes. Keywords: DC-DC flyback converter, RCD snubber, voltage spikes, power dissipation. 
Rancang Bangun Smart Aquarium Menggunakan Metode Fuzzy Logic Mamdani untuk Ikan Botia Berbasis Internet of Things Faturrahman, Vieri; Nurussa’adah, n/a; Maulana, Eka
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Botia fish are freshwater ornamental fish with high visual appeal and economic value. However, this species is currently threatened due to overfishing and challenges in breeding. Botia fish typically thrive in optimal environments with a pH range between 5.0 - 7.5, temperatures of 24-31°C, and good water quality management, including dissolved water particles. Suitable parameters can enhance the fish’s skin color and maintain their health. Therefore, this research aims to design and implement an Internet of Things (IoT)-based Smart Aquarium system using the Mamdani Fuzzy Logic method to improve the maintenance of Botia fish. The system monitors and controls water quality in real-time, including water temperature, dissolved particles, water pH, and manages automatic feeding. In this study, the methods employed include system flowchart design, equipment specifications, and hardware development using an Arduino Uno microcontroller and ESP8266. Sensors such as the temperature sensor (DS18B20), pH, and TDS were installed to measure aquarium conditions, while actuators like heaters, fans, peltier modules, servos, buzzers, and pumps were used to control the state of the Smart Aquarium. The results of this study showed an average accuracy of sensors, actuators, and the system above 97,136 % and demonstrated the system’s ability to regulate temperature and water quality optimally for Botia fish. This research is expected to provide an innovative solution for the challenges of Botia fish maintenance in the context of a sustainable environment.Keywords: The Botia fish, Smart Aquarium, Internet of Things, Mamdani Fuzzy Logic
RANCANG BANGUN ALAT PENERJEMAH KATA BAHASA ISYARAT PORTABEL DENGAN METODE KEYFRAME-BASED SEQUENCE CLASSIFICATION BERBASIS RASPBERRY PI ZERO 2 W Ikhsan, Muhammad; Djuriatno, Waru; Mudjirahardjo, Panca
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Sign language is the primary communication tool for individuals with speech disabilities. Information in sign language is conveyed through unique hand gestures and movement patterns. However, this uniqueness often becomes a barrier for those unfamiliar with it, making it challenging for people with speech disabilities to interact with individuals who do not understand sign language, whether in their surroundings, public spaces, or facilities. This study aims to produce a portable sign language translation device that is easy to carry, can be used independently without assistance, and translates sign language into voice, allowing users to communicate directly, as if they were speaking. The translation device uses CNN technology processed on a Raspberry Pi Zero 2 W to recognize hand gestures and movement patterns. A Keyframe-based sequence classification method is applied to identify keyframes from video recordings of SIBI (Indonesian Sign Language System) gestures. Of the 10 SIBI words, six key frames were identified as input for the classification model, utilizing a TimeDistributed architecture with MobileNetV2 for feature extraction, followed by 1D convolution. The model was optimized for efficiency and performance to enhance inference time and classification accuracy. Reducing the number of frames from six to four provided the best balance, with the fastest inference time of 0.5 seconds and validation accuracy of 96.76% using Depthwise Separable Convolution. Real-time testing showed an average accuracy of 98.31%, with the highest F1-score reaching 100% for the words "Ini" and "Bagaimana", while the lowest F1-score of 83.1% was achieved for the word "11" and 83.6% for the word "Mana". The device consumes 53.81 Wh and is capable of operating for20 hours in a usage scenario of 8 hours active use and 12 hours in idle mode before the next charging.Indeks Terms— Keyframe-Based Sequence Classification, Hand Gesture Classification, Portable Sign Language Translator Device, MobileNetV2.
RANCANG BANGUN SISTEM PENDINGIN PELTIER DAN MONITORING SUHU PADA PANEL SURYA Khalid, Muhamad; Nurussa’adah, n/a; Maulana, Eka
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
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Solar energy as a sustainable renewable energy source has become a major focus in energy technology research and development. Solar panels that convert solar energy into electricity are important role in this energy transition. The performance of solar panels is measured through output parameters such as voltage and current, which are influenced by several factors, especially temperature. Every 1°C (from 25°C) increase will result in a decrease in power of 0.25% to 0.5%. Therefore, this research aims to design a peltier cooling system using the Thermoelectric Cooler TEC1-12706 to reduce the temperature of solar panels and increase the power produced. This system is equipped with an MLX90614 temperature sensor to monitor and limit the effect of cooling, and an INA219 current and voltage sensor to monitor panel performance. Data can be accessed in real time through the Blynk application. The study was conducted on December 13 – 18, 2024 at 10.00 WIB – 11.00 WIB at coordinates 7°57'03.8"S 112°37'41.4"E. The results showed that temperature measurements using the MLX90614 has an accuracy range of 99.70% to 99.94%. Meanwhile, current and voltage measurements using the INA219 has an accuracy range of 99.17% to 100% and 99.33% to 100%. The performance results of the Blynk application as a monitor function well by being able to display values and graphs of current, voltage, temperature, power and cooling indicators. This system has a power requirement of 44.37 W, with the highest temperature drop of 13.78%, the highest current increase of 7.69%, the highest voltage increase of 3.89%, and the highest power increase of 11.82% after using the peltier cooling system. However, the increase in power generated is not proportional to its power usage. Keywords: Solar panel, cooling system, Thermoelectric Cooler, MLX90614, INA219, Blynk. 

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