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All Journal SPEKTRUM: Jurnal Pendidikan Luar Sekolah (PLS) Jurnal Manajemen Pendidikan Jurnal Agroekoteknologi Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Science and Technology Indonesia Journal of Contemporary Urban Affairs Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Pembahsi (Pembelajaran Bahasa Dan Sastra Indonesia) Optika : Jurnal Pendidikan Fisika Cakradonya Dental Journal Jurnal Pendidikan Fisika Jurnal Ilmu Fisika dan Terapannya (JIFTA) Tabasa: Jurnal Bahasa, Sastra Indonesia, dan Pengajarannya Journal of Experimental and Applied Physics
Sari, Mona
Departemen Fisika, Fakultas MIPA, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Journal : Journal of Experimental and Applied Physics

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Solar Tracker Arduino Reza Angraini; Sari, Mona; Yohandri, Yohandri
Journal of Experimental and Applied Physics Vol 3 No 1 (2025): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i1.97

Abstract

Abstract: Electrical power is essential to human life, but dependence on non-renewable fossil fuels is driving the need for alternative energy development such as solar power. Conventional systems without solar trackers cause the efficiency of solar panels to decrease because they cannot optimally follow the movement of the sun. In this research, an Arduino-based dual-axis solar tracker is developed that can move on two axes (horizontal and vertical) to increase the efficiency of solar energy absorption and is equipped with a rain sensor to protect solar panels. This system has the advantage of maximizing energy absorption and providing additional protection from environmental conditions. The test results show the relationship between sunlight intensity and the voltage generated by the solar panel, the higher the sunlight intensity (lux), the higher the voltage generated by the solar panel. For example, at an intensity of 1,300 lux, the voltage reaches 4.7 volts, while at an intensity of 55 lux, the voltage decreases to 0.3 volts. The relationship between the light intensity and the analog reading of the LDR sensor shows that the higher the light intensity received, the higher the analog reading produced by the sensor. At low light intensities, such as 190 lux, the LDR readings at each position (top left, top right, bottom left, bottom right) tend to be different, reflecting the uneven distribution of light. In contrast, at higher light intensities, such as 500 lux, the LDR readings are larger and more evenly distributed, indicating that the solar panel is already in the optimal position perpendicular to the direction of incoming sunlight.Keywords: Solar Tracker, LDR Sensor, Intensity, Voltage, Lux Meter.
Design of a Gravity Acceleration Measurement System Using a Pendulum Oscillation Tool and Tracker Analysis Permata, Annisa; Asrizal, Asrizal; Amir, Harman; Sari, Mona
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.162

Abstract

Experiment has a crucial role in physics, one of the fundamental science for research and technology. This research focuses on gravitation and utilizes methods of experimental design and execution. Measuring gravitation is a frequently studied topic and related to the oscillation pendulum's harmonic. In practice, pendulum oscillations are often still calculated manually without visualizing the pendulum's trajectory during oscillation. With modern learning tools development, harmonic oscillations' measurements can be calculated and analysed by using video tracking software, for example, by generating graphs. A static pendulum with a string in three lengths: 50 cm, 60 cm, and 70 cm is required. The swinging pendulum loaded with a 100-gram weight and filmed by a camera. The recordings were analysed using the tracker software. The results were displayed as a sinusoidal waveform plotted from the points along the pendulum's path during oscillation.
Portable Impedance Spectrometer for Characterizing the Electrical Properties of Dielectric Materials Using A Goertzel Filter Arifin, M Zikri; Mairizwan, Mairizwan; Asrizal, Asrizal; Sari, Mona
Journal of Experimental and Applied Physics Vol 4 No 1 (2026): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v4i1.166

Abstract

Dielectric materials have the ability to store large amounts of electrical energy, which is useful in electronics, such as in the manufacture of capacitors. However, the equipment available for characterization is usually quite complex and expensive. Therefore, this study aims to develop a highly portable embedded impedance spectrometer for characterizing the electrical properties of dielectric materials, namely complex permittivity and dissipation factor, and then demonstrate the effect of increasing the test frequency on the measurement results. The system consists of an STM32F407 microcontroller, an AD9850 DDS as an AC signal generator, and a Goertzel filter algorithm for signal processing. The results of testing the system with paper dielectric samples showed an accuracy of 89.37% for real impedance and 93.22% for imaginary impedance. The results of the paper dielectric sample characterization show an increase in the real value of complex permittivity in the 1kHz-10kHz frequency range, while the imaginary value shows an increase from 1kHz-5kHz and then stabilizes up to 10kHz. The increase in frequency also shows an increase in the dissipation factor (dielectric loss) at each increase in frequency
Co-Authors Ahmad Hafizi Alfu Laila Aminatun Andi Apriany Fatmawati Angga Saputra Anggun Feranisa Arifin, M Zikri Asrizal Asyifa, Kiky Errysza Bambang Sulistyantara Bayu Setiaji Dewi Monica Dewi Utama Falah, Muhammad Miftakhul Fikri, Muhammad Ramdhan Haikal Firda Yanuar Syafaat Fitria, Ratu Gunawarman Hamdi Akhsan Harman Amir Hidayah, Arum Sari Nurul Ina Asnurani Indung Sitti Fatimah Ivathuszalma Jati, Gandi Jati, Nanda Pramesthi Arum Johan, Asya Ananda Amelia Nadya Kamal, Muhammad Fauzi Syaiful Khasanah, Riza Ariyani Nur Maharani, Laras Anindita Mairizwan, Mairizwan Mohamad, Che Wan Sharifah Robiah Muna, Nihadhul Munir, Ryaas Mishbachul Musthofa, Muhammad Azzaky Nashih, Syahid Ahmad Nuniek Hermita Nur Afiqah Nur Iman Muztahidin Pamungkas, Aditya Aji Permata, Annisa Prita Indah Pratiwi Putri, Tiarie Nursya’bani Reza Angraini Riki Perdana Rita Prasetyowati Rizki Amalina Sarno R. Sudibyo Sesilia, Ni Kadek Nabila Siti Solekhah Supardi Supardi Tri Suciati Wahjuni, Trina Yessi Fitriani Yessie Widya Sari Yohandri Bow Yusril Yusuf Yusril Yusuf