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All Journal Jurnal SPEKTRUM Jurnal EECCIS International Journal of Engineering and Emerging Technology JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Ar Ro'is Mandalika (Armada) Majalah Ilmiah Teknologi Elektro Jurnal SPEKTRUM
Pratolo Rahardjo
Department Of Electrical Engineering, Faculty Of Engineering, Udayana University
Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Other

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Integration of IoT in Wearable Devices for Health Monitoring: Challenges and Potentials in the Field of Electrical Engineering Rahardjo, Pratolo
Jurnal Ar Ro'is Mandalika (Armada) Vol. 5 No. 3 (2025): JURNAL AR RO'IS MANDALIKA (ARMADA)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/armada.v5i3.5618

Abstract

The Internet of Things (IoT) has become a major driver in technological transformation, including in wearable devices for health monitoring. The background of this research is based on the increasing need for a real-time, effective, and data-driven health system. The purpose of this study is to explore the challenges and potential of IoT integration in wearable devices, especially in the field of electrical engineering. The method used is a literature study with a content analysis approach to identify patterns and themes from related academic sources between 2018 and 2023. The results show that IoT-based wearable devices can improve the quality of healthcare by integrating sensor technology, communication modules, and artificial intelligence. However, some significant challenges, such as data security, energy consumption, and device interoperability, need to be addressed to drive widespread adoption of the technology. Blockchain is proposed as a potential solution to security concerns, while 5G offers greater bandwidth for data efficiency. This study provides important insights for the development of IoT-based wearables as a key element in modern health management.
RANCANG BANGUN SISTEM MONITOR KONDISI AIR DAN PAKAN BERBASIS IOT DENGAN CATU DAYA PLTS PADA KOLAM LELE I Komang Alit Astawa; Putu Ananta Sastra Wijaya; I Made Aditya Wirawan; IGAP Raka Agung; I N Setiawan; I W Shandyasa; Pratolo Rahardjo; Yoga Divayana
Jurnal SPEKTRUM Vol. 12 No. 3 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2025.v12.i03.p3

Abstract

Catfish farming requires proper monitoring of pond water quality and feed management. Limited time for farmers to monitor ponds directly poses challenges in maintaining water quality and feeding schedule accuracy. This study aims to implement a water quality monitoring device using sensors and an automated scheduled feeding system. This research uses a system development method based on the ADDIE model, consisting of five stages: Analysis, Design, Development, Implementation, and Evaluation. The developed device consists of sensors and actuators. Sensor data is displayed through the Firebase platform and OLED screen on the panel box. The system uses a 120 Wp solar panel with a LiFePO4 12V 22Ah battery as a power source. Testing for 3 days (May 18-20, 2025) showed an average pond water temperature of 25.1°C using DS18B20 sensor, average pH value of 7.7 using pH-4502c sensor, feed volume decreased from 6 kg to 4.9 kg (from 100% to 83%) measured using HC-SR04 sensor, and battery voltage between 13.2-13.8V measured using INA219 sensor. Automated feeding is carried out using a combination of a DC motor and servo motor. The results indicate that the system successfully integrates water quality monitoring and scheduled automated feeding using the Firebase platform. This system has the potential to be applied by fish farmers to overcome time constraints in direct pond monitoring.
RANCANG BANGUN SOLAR TRACKER SINGLE AXIS BERBASIS ARDUINO UNO Ngurah Yowana Asta Prawangsa; I Gusti Made Bagus Kurniawan; Ida Bagus Alit Swamardika; I Wayan Arta Wijaya; Lie Jasa; Pratolo Rahardjo; I Putu Elba Duta Nugraha
Jurnal SPEKTRUM Vol. 12 No. 3 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2025.v12.i03.p9

Abstract

Indonesia has abundant solar energy potential; however, its utilization remains limited due to dependence on fossil fuels and the low efficiency of solar panels caused by static installation systems. To address this issue, this study designed and developed a prototype of an automatic single-axis solar tracker based on Arduino Uno to optimize solar energy absorption. The system is controlled by the Arduino Uno R3 for automatic adjustment of the solar panel position, and the ESP32 is used for real-time monitoring of environmental and electrical parameters. The sensors employed include the BH1750 for light intensity, DHT22 for temperature and humidity, INA219 for voltage and current, and ACS712 for current. Test results indicate that the system is capable of automatically adjusting the solar panel angle, accurately monitoring environmental parameters, and generating stable electrical power for eight hours. Although some instability in current readings was observed when the system operated on battery power, the prototype has proven effective and feasible for further development to enhance the utilization of solar energy.
Rancang Bangun Prototype Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Dengan Studi Kasus Saluran Irigasi Di Desa Medewi Kecamatan Pekutatan Kabupaten Jembrana Irene Trivania; Tom Gerraldo Salomo Situmeang; Martin Luhut Ariberthson Sihaloho; Anak Agung Ngurah Amrita; Lie Jasa; I Wayan Sukerayasa; Pratolo Rahardjo; Dewa Ayu Sri Santiari
Majalah Ilmiah Teknologi Elektro Vol 24 No 1 (2025): ( Januari - Juni ) Majalah Ilmiah Teknologi Elektro
Publisher : Study Program of Magister Electrical Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MITE.205.v24i01.P08

Abstract

Micro Hydro Power (MHP) is a small power plant that uses water to generate electricity. It can be found in irrigation canals, rivers, or waterfalls. The amount of water and head height are important factors in determining the power output. The irrigation canal in Medewi Village is being used as a research location for MHP. Researchers will use the data to perform calculations and design a prototype. They will also conduct an economic analysis of the MHP to determine its feasibility. The discharge at the research location is 0.23 m3/s, and the waterfall is 2.24 m high. Through the calculation results, the researchers determined that the turbine is a crossflow turbine. The turbine power is 3.9 kW, the generator power is 4.375 kVA, and the turbine power in the homer software is 4.195 kW. The cost of building the MHP in the irrigation canals in Medewi Village is IDR20.391.899,26. With a 6% discount rate, the BCR is 1,51, the NPV value is IDR30.827.069, the IRR is 12,3%, and the BEP result per unit The payback period is 1 year 5 months and 2 weeks. Selling 46.585,056 kWh results in an LCC of IDR44.598.314. Using MHP throughout its economic life results in a cost that is less than the price paid to PLN.
Optimization of renewable energy utilization in hybrid power systems to achieve sustainable national energy resilience Rahardjo, Pratolo; Umar, Dedi
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 7 No. 3 (2026): (In Prosess)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol7iss3pp472-477

Abstract

This study examines the optimization of renewable energy utilization in hybrid power generation systems to achieve sustainable national energy security in Indonesia. The research is motivated by increasing energy demand, the depletion of fossil fuel reserves, and commitments to carbon emission reduction. It highlights major challenges in integrating renewable energy into conventional power systems, including limited grid infrastructure, high initial investment costs, the intermittency of sources such as solar and wind, and constraints in energy storage technologies. The study employs a library research approach by analyzing primary and secondary data from scientific books, national and international journal articles, energy agency reports, and case studies of hybrid system implementation in several regions of Indonesia. The findings indicate that Indonesia possesses abundant renewable energy resources—such as solar, wind, hydro, and biomass—which, if effectively integrated into hybrid systems, can enhance electricity supply reliability, reduce dependence on fossil fuels, and strengthen national energy security. The study concludes that developing renewable energy–based hybrid power plants is a key strategy for achieving long-term energy resilience and supporting sustainable development in Indonesia.
Co-Authors Adrian Pramuditya, I Made Agustadewa, Yosia Alie Sulthan, Mayben Sayyidina Alif Rizqian Aki Anak Agung Ngurah Amrita Arya Sukma Krisnayoga D M Baskara Puruhita Wija Dewa Ayu Sri Santiari Efina Marianis Gea, Susi Susanti Gede Prananda Putra Gede Widi Kurniawan Hernandi, William Hindro Kusumo Wahid I Gede Agus Darmawan I Gede Feryanda Frasiska I Gede Hery Putrawan I Gede Yogi Astawan I Gst Agung Putu Raka Agung I Gusti Made Bagus Kurniawan I Komang Alit Astawa I Made Adi Wijaya I Made Aditya Wirawan I Made Anand Gopal I Made Nova Suardiana I N Setiawan I Nengah Raka Utama I Nyoman Budiastra I Putu Agus Padma Diana I Putu Elba Duta Nugraha I Putu Nugraha I Putu Pawesi Siantika I W Shandyasa I Wayan Arta Wijaya I Wayan Sukerayasa I Wayan Yoga Widiana Ida Bagus A. Swamardika Indra Christian, Febry Irene Trivania Kadek Bintang Anjasmara Komang Agus Werdi Darmayasa Komang Edy Surya Prabowo Komang Oka Saputra Langit, Sekar Lie Jasa Lindu Pamungkas Liwa Purnadita, Putu Tesa Made Bayu Pranata Martin Luhut Ariberthson Sihaloho Mudjirahardjo, Panca Muhammad Abdul Hadi Ngurah Yowana Asta Prawangsa Obed Bettuang Oka Saputra, Komang Pande Made Agus Yudi Adnyana Pande Made Nova Paramarta Putu Althea Putri Wiradani Putu Ananta Sastra Wijaya Putu Arya Mertasana Raka Agung, I G A Putu Raka Agung, I Gusti Agung Pt Rizki Pradana Putra Sekar Langit Susi Susanti Gea Tander Risard Lowongan Tom Gerraldo Salomo Situmeang Umar, Dedi Yoga Divayana