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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) 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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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.
Rancang Bangun Sarung Tangan Pendeteksi Warna menggunakan Sensor TCS34725 Bachty, Hadri; Yohandri, Yohandri
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kemampuan penglihatan manusia bervariasi dan sangat mempengaruhi kualitas hidup, terutama dalam analisis bentuk, cahaya, dan warna yang digunakan dalam kegiatan harian. Fokus penelitian adalah untuk merancang dan mengembangkan sarung tangan pendeteksi warna bagi individu dengan defisiensi penglihatan warna (CVD) menggunakan sensor TCS34725, LCD OLED, dan speaker kecil. Sistem ini dirancang untuk meningkatkan kemampuan penderita CVD dalam membedakan warna melalui perangkat elektronik portabel dan efisien. Sistem dibangun dengan Arduino Nano dan komponen terkait melalui tahapan perancangan dan pengujian yang komprehensif. Hasil penelitian menunjukkan tingkat ketepatan pendeteksi warna RGB sebesar 90,97% untuk R, 91,75% untuk G, dan 92,93% untuk B, dengan ketelitian rata-rata 0,994. Pengujian sistem membuktikan bahwa sarung tangan ini mampu mengidentifikasi warna dengan akurasi tinggi. Sarung tangan pendeteksi warna ini efektif dan akurat, diharapkan dapat meningkatkan kualitas hidup penderita CVD dengan membantu mereka mengenali warna dalam kehidupan sehari-hari mereka.
Pengaruh Variasi Temperatur dan Waktu Pembakaran Eceng Gondok terhadap Kadar Silika dan Sifat Mekanik Beton Silika Yulifarma, Rika; Jonuarti, Riri; Yohandri, Yohandri; Jhora, Fadhila Ulfa
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.31030

Abstract

Penelitian ini mengevaluasi pengaruh suhu dan waktu pembakaran eceng gondok terhadap ukuran partikel, pola difraksi amorf, kandungan silika, serta pengaruhnya terhadap kuat tekan, densitas, dan sudut kontak beton. Abu eceng gondok yang kaya silika dapat digunakan sebagai bahan tambahan beton karena sifatnya yang pozzolan, meningkatkan kekuatan dan daya tahan. Penelitian ini menggunakan suhu 500°C dan 600°C dengan waktu pembakaran 90 dan 150 menit. Analisis Scanning Electron Microscope (SEM) menunjukkan nanopartikel eceng gondok berukuran kurang dari 1 nm. X-Ray Diffraction (XRD) menunjukkan pola amorf dengan puncak pada 2θ sekitar 21,8°. X-Ray Fluorescence (XRF) menunjukkan bahwa pembakaran pada suhu 600°C selama 150 menit menghasilkan kandungan silika tertinggi sebesar 84,96%. Dengan demikian, kondisi optimal adalah 600°C selama 150 menit. Beton dengan abu ini menunjukkan penurunan kuat tekan sebesar 0,7% (di bawah 1%), namun kekuatannya meningkat pada umur 14 hari, memenuhi standar mutu. Sudut kontak beton silika berumur 14 hari adalah 98,663°, dan densitas beton normal mencapai 2354,077 kg/m³. Oleh karena itu, penggunaan abu eceng gondok dalam produksi beton layak dan menguntungkan.
Pengaruh Variasi Temperatur terhadap Specific Fuel Consumption pada Proses Pengeringan Biji Kopi menggunakan Alat Rotary Dryer Berbahan Bakar Gas LPG Marambang, Alfi Yory; Sundari, Okta; Kholidah , Nurul; Bow, Yohandri; Effendy, Sahrul
Innovative: Journal Of Social Science Research Vol. 4 No. 5 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i5.14909

Abstract

Metode pengeringan memungkinkan produk tetap berkualitas tinggi untuk waktu yang lebih lama. Salah satu metode alternatif untuk mengeringkan biji kopi adalah dengan menggunakan pengeringan jenis rotary. Rotary dryer merupakan salah satu perangkat yang sering digunakan dalam industri pengeringan yang terdiri dari tabung berputar yang dipanaskan dari luar, dan udara panas diarahkan ke dala m tabung untuk menguapkan kelembaban dari permukaan material yang berputar di dalamnya. Pada penelitian bertujuan untuk mengurangi kadar air pada biji kopi dengan nilai kadar air sesuai dengan standar SNI 01-2907:2008 yaitu sebesar 12,05%. Hasil dari penelitian ini didapatkan kadar air 12,05% pada temperatur 80oC pada waktu selama 300 menit, dengan laju pengeringan paling tinggi sebesar 1,063 kg/jam m2 dengan nilai Specific fuel Consumption (SFC) meningkat hingga 0,383 Kg/kWh.
Co-Authors ,, Tahdid ., Zurohaina 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 Bachty, Hadri Baharuddin Baharuddin BAKHRANI RAUF Bayu Saputra Budiman, Ria 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 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 Muharram, Muharram Mustofa Mustofa Najwa, Cholida Nedia Sandika Nofi Yendri Sudiar Novarini, N Pakhrur Razi Prakoso, Dibyo Putra, Andhika Satria Putra, Asri Eka Putra, M. Rizky Adhitya Rahmadina, Nisa 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 Zulhendri Kamus Zulma, Degito Zulyusri Zulyusri