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All Journal Journal of Experimental and Applied Physics
Asrizal Asrizal
Department of Physics, Universitas Negeri Padang
Control & Systems Engineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Development of Measurement Instrument of Translation Motion in Constant Acceleration Experiment using Infrared Obstacle Avoidance Sensor Module and MPU 6050 Based on ATmega32U4 Microcontroller Ilham Hafidzh Wijaya; Yohandri Yohandri; Asrizal Asrizal; Yulkifli Yulkifli
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.29

Abstract

Physics is a field of study that holds significant influence in the development of science and technology. Many natural phenomena are related to physics and can be explained through experiments. From the results of conducted research, it is known that measurements for Translation Motion in Constant Acceleration experiments were carried out manually using standard measuring tools. The limitations of these measuring tools rendered the process impractical and susceptible to errors. To overcome these limitations, an experimental device equipped with automated digital measurement instruments was developed. The objective of this research is to ascertain the design specifications and performance specifications of the experimental device. The performance specifications of the experimental device include a track length of 2 meters and a width of 13mm. It involves the use of a servo motor, Infrared Obstacle Avoidance Sensor Module, and MPU 6050. The design specifications of the experimental device include an angle measurement accuracy of 92%, time measurement accuracy of 89%, velocity measurement accuracy of 87%, and time measurement precision of 92%. So, it is concluded that the measurement instrument can work properly.
Design A Real-Time Fish Feeding Control System on The Internet of Things Mia Febrianty; Asrizal Asrizal; Hufri Hufri; Rio Anshari
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.37

Abstract

Scheduled feeding is very important in fish farming. Proper and scheduled feeding will increase yields and pond water quality. Fish farmers often ignore feeding according to fish needs. So that it worsens the water quality, as a result the yield and survival of fish decreases. This problem can be overcome by creating a system that can provide feed based on the ideal dose of feed to fish, in order to reduce pollution of pond waters and increase fish survival. This study aims to determine the specifications of accuracy and precision of laboratory scale systems and specifications of accuracy of field test scale systems. The research method used is engineering research method. The data obtained is measured by direct and indirect measurement techniques. This system uses wemos D1 mini, arduino cc, blynk software, RTC DS3231, load cell, DS18B20 and servo. The laboratory scale accuracy and precision specifications of the feeding control system on the measurement of the weight of the system tube feed are 99.70% and 99.80%, on the system container are 98.87% and 98.87%, while on the system temperature measurement are 98.10% and 97.96%. The accuracy value of the field test scale is 98.38%.Based on the results of testing the accuracy and precision of the fish feeding device, it is found that the design of a real time fish feeding system based on the internet of things can be used in monitoring and automatic feeding activities.
Trends and Research Opportunities For Microcontroller-Based Flood Warning Systems: A Bibliometric Analysis Aulia Isti; Asrizal Asrizal; Harman Amir; Leni Aziyus Fitri
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.v4i1.114

Abstract

Indonesia as an archipelago has a high level of vulnerability to flood disasters, which is worsening due to climate change, rapid urbanization, and weak mitigation systems. Ideally, an early warning system that is responsive, accurate, affordable and easy to implement in vulnerable areas is needed. While microcontrollers offer a potentially effective technological solution, most research is still limited to small prototypes without regard to long-term predictability or community participation. This study aims to evaluate the development, focus, and prospects of microcontroller-based flood warning system research using a quantitative bibliometric approach. A total of 200 articles from 2015-2025 were collected through Publish or Perish and analyzed using VOSviewer. The results showed, first, a significant increase in publications occurred in 2024, namely 29 articles. Second, word network visualization resulted in the mapping of 87 keywords in 7 clusters. Third, data overlay visualization resulted in a shift in focus to IoT integration, the latest microcontrollers, cloud-based monitoring. Fourth, data density analysis confirms the dominance of technical aspects, where keywords such as microcontroller, flood early warning system, and flood become the center of attention with the highest density level. The implications of these findings provide direction for the development of a more adaptive, inclusive, and applicable flood warning system in disaster mitigation.
Design of a Gravity Acceleration Measurement System Using a Pendulum Oscillation Tool and Tracker Analysis Annisa Permata; Asrizal Asrizal; Harman Amir; Mona Sari
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 M Zikri Arifin; Mairizwan Mairizwan; Asrizal Asrizal; Mona Sari
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 Annisa Permata Aulia Isti Harman Amir Hufri Hufri Ilham Hafidzh Wijaya Leni Aziyus Fitri M Zikri Arifin Mairizwan Mairizwan Mia Febrianty Mona Sari Rio Anshari Yohandri Yulkifli Yulkifli