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All Journal EKSAKTA: Journal of Sciences and Data Analysis POSITRON Techno: Jurnal Penelitian Edu Sains: Jurnal Pendidikan Sains dan Matematika IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Al Ishlah Jurnal Pendidikan Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Momentum: Physics Education Journal Jurnal Redoks JURNAL PENDIDIKAN TAMBUSAI Aptisi Transactions on Technopreneurship (ATT) Kinetika Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Teknologi International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Chemical Engineering Journal Storage (CEJS) Proceeding ISETH (International Summit on Science, Technology, and Humanity) Internet of Things and Artificial Intelligence Journal Innovative: Journal Of Social Science Research Bioedunis Journal International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Applied Engineering, Innovation, and Technology Journal of Experimental and Applied Physics
Yohandri Bow
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Journal : Journal of Experimental and Applied Physics

 1 
Design and Development Of Inorganic Fertilizer Packaging System With Iot-Based Tally Counter Apriani, Akmecia Risqa; Yohandri, Yohandri
Journal of Experimental and Applied Physics Vol 1 No 1 (2023): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i1.1

Abstract

Inorganic fertilizers are fertilizers derived from chemical products produced by factories. This chemical, if inhaled, will seriously affect retail fertilizer sellers. Currently, sellers of diluted fertilizers still pack fertilizer manually, which takes a long time, as well as excessive labor and frequent fraud by employees against business owners and employees. The packaging system is engineering research aimed at determining the performance and design specifications of the system. The performance specification describes the performance of the packaging system, while the design specification describes the tool's sensor characteristics, accuracy, and precision. Data obtained through direct and indirect measurements. The direct measurement results are obtained from measuring the mass and detection distance of the packaging. In contrast, the indirect measurement results are obtained from the accuracy and precision of the tool. The results obtained on the system are performance specifications and tool design. The mechanical form of the device is obtained from the performance specifications. Then the system will detect the packaging that can be seen through the smartphone. The results obtained in this system are performance specifications and tool design. The mechanical form of the tool is obtained from the performance specifications. The system will measure the mass and detection distance of the packaging. The number of packaging can be seen through a smartphone. The accuracy of the packaging system to the mass is 99.82%, while the tool's accuracy to the mass is 99.52% which is obtained from the accuracy of measuring object 1.
IoT-based Pyranometer Using Photodiode Sensor Widiartha, Wahyu Dewa; Yohandri, Yohandri
Journal of Experimental and Applied Physics Vol 1 No 1 (2023): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i1.5

Abstract

Solar irradiance is one of the critical parameters of climatology because it is the driver of most of the dynamic processes in the atmosphere. We need a tool to measure solar irradiance, such as a pyranometer. However, the pyranometer has the disadvantage that it requires cables and electricity to send data to data processing devices, which sometimes causes data loss problems if the connecting cable is damaged unnoticed and a sudden power outage occurs. An IoT-based pyranometer using a photodiode sensor will overcome this problem because the tool will send the measured solar irradiance data directly to the internet. The objective of this research is to minimize the measurement data loss that occurs and to ensure the data quality. This is possible because the device operates with solar cells that constantly recharge the battery. This research is a type of engineering research. The measurement technique used is a direct measurement, comparing solar irradiance data with a standard pyranometer, then indirectly analyzing the accuracy and precision of the design tool. Based on direct testing of the tool, an accuracy and precision rate close to 100% was achieved, which was 98.19% and 98.63%, respectively. Therefore, it can conclude that the tool can work well. Moreover, measurements were also conducted at BMKG Sicincin on July 13, 2022 from 08:56 to 15:10, resulting in a measurement percentage of 4.87% with the highest solar irradiance at 12:15.
Arduino-based Spectrometer Design for Measurement of Liquid Absorbance Yohandri, Yohandri; Rahmawati, Diah
Journal of Experimental and Applied Physics Vol 1 No 1 (2023): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i1.8

Abstract

The Spectrometer is an important common analytical equipment that measures the concentration of analytes via their absorbance of light at specific wavelengths. However, many laboratories with limited resources cannot afford such equipment. A Spectrometer utilizes the wavelength of the electromagnetic spectrum. The main component of the spectrometer is the sensor detector. The BH1750 sensor is used to detect the absorbance of the sample after being irradiation with a Light Emitting Diode Red Green Blue (LED RGB). If the RGB light irradiated the sample, the sensor will read the output value according to the Arduino Programming. This study used Congo red samples with various concentrations of 20, 30, 40, 50, and 60 ppm. the tool can be developed at low cost and the performance of the tool is highly satisfactory in terms of accuracy and precision.
Water pH Measurement Instrument using Titration Methods Illahi, Kurnia; Yohandri, Yohandri; Darozat, Fajar Mukharom
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.51

Abstract

Indonesian aquaculture is one of the activities supporting production and economic activities in the fisheries sector locally and nationally. The endurance of the fish body is very dependent on the quality of the water used. One of the water quality parameters is the degree of acidity (pH). The problem in measuring the pH of water is the limited use of the pH meter sensor because the sensor probe must be cleaned regularly. One solution to overcome this problem is to make a water pH measuring instrument for aquaculture using the titration method. This tool is designed to make it easier for aquaculture farmers to measure the pH quality of water without touching the fish pond water. Research was conducted to determine the tool's design and performance specifications. The performance specifications of the water pH measuring instrument consist of mechanical design and electronic design. The results of the color reading of the pH value of the device can be displayed on a serial monitor through the Arduino IDE application or on the Bluetooth terminal serial application on Android. The design specifications of the water pH measuring instrument consist of the accuracy and accuracy of the measurement of the pH value of water with the following details: The average pH value reading error is 1.027% with an average accuracy of 98.973% and an average accuracy of 99.419%.
Design and Construction of A 3-Dimensional Vibration Measurment Tool Using Accelerometer Sensors Based On The IoT For Implementations of Building Structures Gabe, Totop; Yulkifli, Yulkifli; Yohandri, Yohandri; Ahadi, Suaidi
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.55

Abstract

The building structure plays a crucial role in distributing the loads exerted by the building onto the ground, ensuring its strength to prevent collapse or damage. A common form of building damage is cracking due to vibrations. These vibrations can originate from both inside and outside the building, often at low frequencies. To address this, a vibration measuring instrument needs to be designed using a 3-Dimensional Accelerometer sensor to facilitate easier detection and data acquisition, thereby minimizing errors in measuring low vibrations caused by human activities that impact the durability of building structures. The research focuses on developing a tool to measure 3-dimensional vibrations in buildings using an Internet of Things (IoT)-based accelerometer sensor. This engineering research aims to design a 3-dimensional vibration measuring instrument. The resulting design includes performance specifications and system design specifications. The system's performance specifications cover the electronic circuit of the tool and the design of the measurement value monitoring display. The system employs the MPU6050 sensor to measure vibrations, with Arduino Uno as the main microcontroller and NodeMCU ESP32 for transmitting measurement data from Arduino to the web server. Experimental tests were conducted to measure vibration frequency by repeatedly dropping a 100-gram load from a height of 70 cm onto a wooden table. The load was dropped 10 times, maintaining a 2 cm distance from the coordinates of the measuring device. The experiments provided real-time measurement results, showing varying frequencies each second. The device successfully detected very low vibrations, with a minimum recorded frequency of 11.26 mHz and a peak of 93.18 mHz in the sixth experiment. The varying results across experiments were influenced by factors such as measurement sensitivity, filtering, sampling frequency, calibration, data processing, and noise minimization. The analysis confirmed that the tool could detect vibrations every second with high sensitivity, making it suitable for real-time detection of various low-frequency vibrations under consistent load conditions
Design of Servo-Controlled Titrant Flux Regulation System Zulma, Degito; Sari, Mona Berlian; Yohandri, Yohandri; Darvina, Yenni
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.82

Abstract

The advancement of automation in laboratory instrumentation has significantly transformed the field of chemical analysis by enhancing precision, efficiency, and reproducibility. The development of an advanced titrant flux regulation system presents substantial potential benefits. This research focuses on the design of a Titrant Flux Regulation System utilizing a Servo Motor and PCA9685 Driver for Automated Titrators, with the aim of improving the accuracy of titration processes. The system employs a servo control mechanism driven by the PCA9685 driver to precisely maneuver the burette crank. The methodology encompasses system design, simulation, prototyping, and performance testing. A microcontroller-controlled servo motor ensures precise movements of the burette crank, enabling accurate titrant delivery. The developed prototype demonstrates the ability to regulate titrant flow with high precision, facilitating fine-tuned control of titrant volume to meet specific titration requirements. The servo and PCA9685-based system shows significant promise for application in automated titrators, offering enhanced accuracy and control of titrant flow, thereby optimizing the titration process.
Systematic Literature Review of TCS34725 Sensor Applications in Various Fields Anisa, Widya; Sari, Mona Berlian; Yohandri, Yohandri; Asrizal, Asrizal
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.83

Abstract

The TCS34725 sensor, recognized for its precise color detection across the visible spectrum, is essential in agriculture, food safety, healthcare, security, and industry. As automation advances, reliable color detection systems are crucial for replacing subjective and inconsistent manual assessments. However, challenges such as varying lighting conditions and the need for advanced data processing techniques impact its accuracy and integration. Enhanced algorithms and machine learning applications enable real-time analysis, reducing human error and ensuring reliable results. The sensor's versatility supports applications such as monitoring crop ripeness, detecting harmful substances in food, and aiding medical diagnostics like urine analysis. This study conducts a systematic literature review to explore trends, advancements, and gaps in the sensor's applications. Findings emphasize its role in advancing Industry 4.0 by digitizing processes, fostering sustainable innovations, and improving operational efficiency, reliability, and quality of life.
Impedance Tube Method Based On Arduino For Material Acoustic Measurement Anwar, Suci; Yohandri, Yohandri; Darvina, Yenni; Yulkifli, Yulkifli
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.v3i1.89

Abstract

Acoustics play a crucial role in advancing technology and industry by mitigating moise, which is an uwanted byproduct of many devices. However, existing tools for testing acoustic properties often lack automation and calibration, which limits their realibility and usability. This study introduces the development of a test device designed to measure the sound absorption coefficient of materials using the two-microphone impedance tube method. The device incorporates a PVC tube, an Arduino Nano Microcontroller, and an OLED display for real-time data analysis and visualization. The proposed device offers simplicity, portability, and improved measurement accuracy compared to existing solutions. The method involves measuring sound intensity and absorption coefficients using direct dan indirect techniques. Experimentals results demonstrate that the device achieves an average accuracy rate of 20.38%, with consistent absorption coefficient values across repeated tests. The frequency range tested aligns with the performance limits of the device, further confirming its reliability. In conclusion, the developed device provides a practical and reliable solution for testing acoustic materials, addressing the limitations of previous methods.
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.
An Infusion Monitoring System With An Internet Of Things Based On Smartphone Nazhifah, Naurah; Yohandri, Yohandri
Journal of Experimental and Applied Physics Vol 3 No 4 (2025): In Progress: December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i4.158

Abstract

Infusion is one of the most frequently used medical mechanisms as a therapeutic. The volume of infusion fluid, when not monitored regularly, can harm the patient. When the infusion fluid has run out and is not immediately replaced, the air will enter the blood vessels. Infusion monitoring in Indonesia is still done manually. Previous research has developed an infusion monitoring device using Arduino however, this device generally lacks remote monitoring capabilities, thus tending to use microcontrollers inefficiently. To address these issues, an Infusion monitoring system was designed using the NodeMCU ESP8266. This device reads the number of infusion fluid drops using an Optocoupler sensor, and a Load cell sensor measures the percentage of remaining fluid. Measurement results can be detected easily and quickly via a smartphone. The innovation in this system lies in the Internet of Things (IoT), which enables remote control. The research conducted was to determine the design specifications and performance specifications of the device. This can be seen from the results of the device design specifications, namely the average accuracy of the infusion rate of the number of drops/minute is 98.89% with an average accuracy of 98%, while the average accuracy of the remaining infusion fluid percentage is 96.8% with an average accuracy of 98%. This system offers an efficient and controlled solution for combining infusion fluids. By integrating IoT technology, this research paves the way for the development of more advanced infusion monitoring systems, supporting improved patient care in the era of global healthcare
Co-Authors ,, Tahdid -, Zurohaina ., Zurohaina Abda Abda Abdul Razak Abdul Wahid Abu Hasan Abu Hasan Afrianda, Teguh Ahmad Taqwa Aida Syarif AIDA SYARIF Al-Insyrah, Eyza Recwika Ali Ahmad Alwi Nofriandi Anisa, Widya Anwar, Suci Apriani, Akmecia Risqa Arif Budiman Arissetyadhi, Iwan Arizal Aswan Asrizal Audia, Washilla Aulia Asman Ayu Permata Sari Azis, Hasbi Bachty, Hadri Baharuddin Baharuddin BAKHRANI RAUF Bayu Saputra Budiman, Ria Candra Aprizal Daniar, Rima Darozat, Fajar Mukharom Diah Iswandari Diah Rahmawati Effendy, Sahrul Erlinawati . Fadhlurrahman, M Revanza Fatahul Arifin Fatahul Arifin, Fatahul Fatria Fatria Fatria Febriana, Ida Festiyed Fitri Arsih Gabe, Totop Harjadi Gunawan Harliyani, Ayu Dwi Heru Afriansyah I Nyoman Sila Ibnu Hajar Ichsan Astanto Idham Mahenri Ifdil Ifdil Illahi, Kurnia Indah Purnamasari Isdaryanto Iskandar Jaya Utama Putra Jhora, Fadhila Ulfa Juanta, Palma Kalsum, Leila Kholidah , Nurul Leila Kalsum Leila Kalsum Lety, Trisnaliani Lufri Lufri M. Amir M. Reza Ramlan M. Syahirman Yusi Mahardhika, Lintang Putri Mairizwan, Mairizwan Manggala, Agus Manurung, Nicolas Marambang, Alfi Yory Maryam Seyaski Fitria Melta, Defrian Minda Azhar Miranda Roulina Miranda Roulina T Monica, Levia Moyo, Kgomotso Muhammad Agung Muhammad Reza Ramlan Muhammad Taufik Muhammad Yerizam Muhammad Zulfahmi Mustofa Mustofa Najwa, Cholida Nazhifah, Naurah Nedia Sandika Nofi Yendri Sudiar Novarini, N Pakhrur Razi Prakoso, Dibyo Putra, Andhika Satria Putra, Asri Eka Putra, M. Rizky Adhitya Rahmadina, Nisa Raihansyah, Ahmad RD Kusumanto Reza Angraini Rhevy Liandari Rifa'i, Ahmad Imam Riri Jonuarti Robby Setiadi Robert Junaidi Robiansyah RR. Ella Evrita Hestiandari Rusdianasari Rusdianasari Rusdianasari Rusdianasari Salamah, Luthfia Samosir, Devina Sanchia Santosa, Tomi Apra sari, Desi Nurmala Sari, Mona Sari, Mona Berlian Septiana, Iriani Reka Shela Dilen Putri Siagian, Gunaria Sigit Kurniawan Sirajuddin Skunda Diliarosta Sofianora, Aulia Suaidi Ahadi Sundari, Okta Sutini Pujiastuti Lestari Sutini Pujiastuti Lestari Suyanta Suyanta Syakdani, Adi Tahdid . Thamrin Thamrin Tresna Dewi Wibby Aditya Putra Utama Widiartha, Wahyu Dewa Winiasri, Linda Wiranata, Muhammad Adithia WULANDARI, NILA Yenni Darvina Yerimadesi Yerimadesi Yulifarma, Rika Yulkifli Yulkifli Yusi, Syahirman Zakiyah Sri Rezeki Zikri, Ahmad Zikri, Ahmad Zulhendri Kamus Zulma, Degito Zulyusri Zulyusri