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All Journal Jurnal SPEKTRUM Jurnal EECCIS International Journal of Engineering and Emerging Technology Jurnal Ar Ro'is Mandalika (Armada) Majalah Ilmiah Teknologi Elektro Jurnal SPEKTRUM
Pratolo Rahardjo
Department Of Electrical Engineering, Faculty Of Engineering, Udayana University
Religion 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

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Journal : Jurnal SPEKTRUM

 1 
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.
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 Elba Duta Nugraha, I Putu 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 Elba Duta Nugraha, I Putu Elba 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 Nugraha, I Putu Elba Duta 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 Yoga Divayana