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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan BERKALA FISIKA JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Omega: Jurnal Fisika dan Pendidikan Fisika Indonesian Physical Review Kappa Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics
Erus Rustami
Departemen Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, IPB University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Other

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 1 
Rancang Bangun Alat Ukur Klorofil Daun dengan Metode Fluoresensi Berbasis Mikrokontroler Rustami, Erus; Rahmayanti, Aisyah
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 3 No 1 (2017)
Publisher : Program Studi Pendidikan Fisika UHAMKA

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Abstract

Telah dilakukan perancangan dan pembuatan alat ukur klorofil pada daun menggunakan metode fluoresensi. Sumber cahaya yang digunakan adalah laser dioda dengan panjang gelombang 410 nm, sedangkan pengukuran intensitas fluoresensi menggunakan sensor TCS3200 dengan keluaran berupa frekuensi yang berkorelasi dengan intensitas yang diterima sensor. Pengujian alat dilakukan melalui perbandingan data hasil pengukuran antara alat yang dibuat dengan SPAD 502 Chlorophyll Meter. Hasil pengujian menunjukkan bahwa alat sudah dapat mendeteksi kadar klorofil pada daun meskipun masih terdapat persen kesalahan yang cukup besar, yaitu sekitar 14% jika dibandingkan dengan alat ukur standar.
UJI KARAKTERISTIK SENSOR SUHU DAN KELEMBABAN MULTI- CHANNEL MENGGUNAKAN PLATFORM INTERNET OF THINGS (IOT) Erus Rustami; Rima Fitria Adiati; Mahfuddin Zuhri; Ardian Arif Setiawan
BERKALA FISIKA Vol 25, No 2 (2022): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Telah  berhasil  dilakukan  uji  kinerja  empat  jenis  sensor  suhu  dan  kelembaban  yang  tersedia  di pasaran,  yaitu  DHT22,  BME280,  SHT31  dan  DS18B20.    Sensor  tersebut  dihubungkan  dengan WeMos  D1  R1  ESP8266  yang  bertugas  untuk  mengelola  dan  mengirimkan  data  ke  platform internet  of  things  (IoT)  ThingSpeak.  Pengiriman  data  menggunakan  protokol  message  queue telemetry transport (MQTT) yang berdaya rendah (low-power) dan dapat diandalkan (reliable). Laman web ThingSpeak menampilkan grafik suhu dan kelembaban masing-masing sensor. Data suhu dan kelembaban tersebut dibandingkan dengan thermohygrometer sebagai referensi. Hasil pengujian menunjukkan bahwa sensor mampu mendeteksi perubahan suhu ruangan dengan nilai pembacaan  yang  tidak  berbeda  jauh  dengan  referensi.  Secara  umum,  semua  sensor  bekerja dengan  cukup  baik  yang  ditandai  dengan  koefisien  determinasi  yang  cukup  tinggi  pada  kurva kalibrasi yaitu lebih dari 0,94 untuk suhu dan 0,96 untuk kelembaban.
Kajian Fluktuasi Sifat Dielektrik Telur Puyuh yang Bervariasi pada Lama Penyimpanan Irawan, Bagus; Maddu, Akhiruddin; Rustami, Erus; Sulaeman, Ahmad Sofyan; Putro, Permono Adi
TIME in Physics Vol. 2 No. 1 (2024): March
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2024.v2i1p41-49

Abstract

An increasing of public attention to the quality of food has been increasing, recently. One type of food that consumed is quail eggs (QE). In this study, QE were tested by Electrochemical Impedance Spectroscopy (EIS) method with some parameters such as complex impedance, dielectric constant, and loss tangent analysis. Several interesting results showed that dielectric properties of QE experience a fluctuation phenomenon if the test is influenced by storage duration, qualitatively. Therefore, we approximately prove that QE quality can be tested via EIS to obtain fine results.
Alat Monitoring Suhu Berbiaya Rendah Berbasis Arduino Mega 2560 dengan Menggunakan Sensor Adafruit MAX31856 Efendi, Rustam; Herlina, Herlina; Tando, Arjal; Padang, Welly Liku; Darwin, Darwin; Mustafid, M. Azhar; Rustami, Erus; Jayanegara, Sudarmanto; Irwansyah, Irwansyah; Harmiansyah, Harmiansyah
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 9, No 1 (2023): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v9i1.7627

Abstract

Monitoring suhu menggunakan data logger merupakan pilihan yang baik untuk memantau suhu dalam mode perpindahan panas. Tujuan dari penelitian ini adalah untuk mengembangkan data logger dengan biaya yang rendah. Arduino merupakan salah satu pilihan yang dapat digunakan untuk membangun sebuah data logger. Metode penelitian yang digunakan adalah metode rancang bangun sebuah sistem data logger. Hasil penelitian menunjukkan bahwa sistem data logger pengukur suhu dengan sensor Adafruit MAX31856 dapat bekerja dengan baik dan memberikan pembacaan yang stabil, di mana termokopel tipe K digunakan dalam penelitian ini.
DEVELOPMENT OF LOW-COST OPTICAL SENSOR-BASED DEVICE FOR REAL-TIME MICROALGAE CONCENTRATION MEASUREMENT Syafutra, Heriyanto; Rustami, Erus; Claudia, Stephanie; Hardiningtyas, Safrina Dyah; Supriyanto, Supriyanto; Zuhri, Mahfuddin
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.473

Abstract

Conventional methods for measuring microalgae concentration in water require several steps and must be carried out in the laboratory. These measurements are usually performed by counting microalgae filaments under an optical microscope using the Sedgewick Rafter Counting (SRC) method or by spectroscopy, utilizing light absorption by microalgae's chlorophyll. In this study, we propose an innovative and portable spectroscopic device for real-time measurement of microalgae concentration by integrating a light-dependent resistor (LDR) sensor and a microcontroller-based processing unit. The microalgae used in this study were Spirulina, a filamentous microalga from the class Cyanophyceae. The SRC method was used as a reference for measuring Spirulina concentration. UV-Vis spectroscopy data showed that the absorption of chlorophyll a and b was in the range of 400 - 450 nm. The absorption coefficients obtained from the UV-Vis absorbance vs. concentration relationship were in good agreement with those obtained from the logarithmic light intensity vs. concentration relationship across all tested predictive models. We confirmed that the emission spectrum of the LED used was aligned with the dominant absorption of Spirulina chlorophyll, ensuring accurate optical detection of microalgae concentration. The developed device demonstrated rapid estimation of microalgae concentration, with an average accuracy of more than 75%. This study showed that a portable and low-cost microalgae concentration measurement system can be developed using optical sensors and microcontrollers as an alternative to laboratory-based measurements. In addition, the designed device can be integrated with Internet of Things (IoT) platforms, enabling real-time monitoring of environmental conditions for applications such as water quality assessment, aquaculture, and biofuel production.
Efficiency Improvement, Design Optimization, and Expansion of Oxygen Flow Valve Holes in Small Industrial Scale Husk Furnaces Hanifan, Rahmah Asri Nurani; Hajar, Siti; Har, Nazopatul Patonah; Zuhri, Mahfuddin; Rustami, Erus; Nikmatin, Siti; Irzaman, Irzaman
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 12 No 2 (2023): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v12i2.18960

Abstract

Indonesia has an abundant amount of industry. Production in large, medium, and small industries still uses gas and oil as fuel sources. The fuel sources used still come from non-renewable energy. There is a need for alternative use of renewable energy to reduce the use of non-renewable energy. One solution is the use of rice husk biomass as a fuel source. Rice husk is still often considered as waste despite its many utilizations. The utilization of rice husk waste must be improved to increase its beneficial value. Rice husk waste can be utilized as a fuel source in a husk furnace. A husk furnace is a cooking device in which the fuel (rice husk) is burned using direct combustion. This research aims to optimize the efficiency of the husk furnace by varying the size of the oxygen flow valve hole and the mass of water being heated. Tests were conducted on four variations of oxygen flow valve hole size, namely, 36x27 cm2, 36x34 cm2, 43x34 cm2, and 50x34 cm2, and two variations of water mass (6 and 18 kg). The research was conducted by heating water using the Water Boiling Test method with test parameters: heating time, fuel consumption rate, energy in, energy out, heat efficiency, heat transfer rate, and ash and charcoal yield. The significant efficiency value can be used as a reference for small-scale industrial rice husk furnaces. The most significant efficiency in the study was 54.99%, achieved by a 43x34 cm2 valve hole for heating 18 kg of water. Based on the most effective efficiency value gained, the expansion of the oxygen flow valve hole is sufficient to be used as a test parameter to test the optimization of small industrial-scale husk furnaces.
Pengembangan Model Neuron Berbasis Konduktansi untuk Deteksi Penyakit Parkinson Zagita, Wanda; Rustami, Erus; Kartono, Agus
Kappa Journal Vol 7 No 3 (2023): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i3.23954

Abstract

Penyakit parkinson merupakan salah satu penyakit yang mengalami gangguan neurodegeneratif. Gangguan tersebut merupakan suatu kondisi patologis sel saraf di mana sel saraf akan terus kehilangan struktur atau fungsinya. Menghadapi semakin banyaknya penderita penyakit parkinson dan jumlah ahli yang sedikit, maka diperlukan suatu metode yaitu sistem yang profesional untuk mendukung pendeteksian awal pada penyakit tersebut. Pada penelitian ini, model direpresentasikan sebagai persamaan diferensial biasa yang digabungkan sehingga dapat menggambarkan tegangan aktifitas pada neuron Subtalamic Nuckleus (STN). Penelitian ini bertujuan untuk membandingkan hasil simulasi menggunakan model dasar Hodgin-Huxley (HH) dengan penambahan arus tambahan untuk mendeteksi adanya penyakit parkinson. Perhitungan model simulasi dilakukan dengan menggunakan metode Runge-Kutta orde keempat. Hasil simulasi deteksi menunjukkan bahwa efek dari penambahan arus sinaptik dan arus stimulasi otak dalam secara signifikan terdapat tegangan respons yang berbeda dengan model asli persamaan HH pada aktifitas neuron. Hal ini disebabkan oleh reseptor terletak pada neuron glutamatergik, sehingga neuron-neuron ini akan dihambat oleh peningkatan aktivitas arus sinaptik dan stimulasi otak dalam
DESIGN OF A PORTABLE COLORIMETRIC SYSTEM BASED ON THE COLOR SENSOR TCS3200 (GY-31) FOR DETECTING THE CONCENTRATION OF METHYLENE BLUE IN SOLUTIONS Lalu Teguh Permana; Muhandis Siddiq; Husin Alatas; Erus Rustami
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.648

Abstract

A low-cost colorimetric system based on an Arduino microcontroller and a TCS3200 (GY-31) RGB sensor was investigated to estimate the concentration of methylene blue (MB) in aqueous solutions. Measurements were conducted using a transmission-mode optical configuration, in which a white-light source passes through a cuvette with a fixed optical path length, and the transmitted light is detected as a frequency output. The frequency signal was used as a relative indicator of light intensity, and absorbance was calculated from the ratio of transmitted to reference frequency. Calibration was performed over a concentration range of 0.1–20 ppm, and the results were compared with those obtained using a UV–Vis spectrophotometer. The system showed an approximately linear response to MB concentration with a coefficient of determination (R²) of 0.9807. An average relative error of 18% was observed in the validation results, with limits of detection (LOD) and quantification (LOQ) of 3.95 ppm and 13.17 ppm, respectively. The relatively high LOQ is primarily due to the broadband RGB detection characteristics and signal variability of the low-cost sensor system, which limit sensitivity at low concentrations. Repeated measurements yielded a coefficient of variation below 3%, indicating acceptable short-term repeatability. These results demonstrate the feasibility of the proposed low-cost system for preliminary screening or indicative assessment of MB concentration, particularly at levels near regulatory limits. Further improvements in optical stabilization, spectral selectivity, and calibration procedures are required to enhance sensitivity and accuracy for broader analytical applications.
Performance Test of Environmental Odour Measurement Instrument Dede Heri; Arief Sabdo Yuwono; Erus Rustami; Daranrat Jaitiang
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 2 (2026): July 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i2.559-571

Abstract

Environmental odour assessment is important for evaluating air quality and community amenity; however, conventional dynamic dilution olfactometry requires specialised laboratory facilities and costly equipment, limiting its use for routine field monitoring. This study developed and evaluated a direct-airflow environmental odour measurement instrument that delivers ambient air directly to panellists without dilution. The instrument was designed to operate at an airflow velocity of 1 m/s, selected through climatological analysis, panellist preference testing, and technical verification against ASHRAE Standard 55 and EN 13725:2022. Eight screened panellists assessed ambient air, n-butanol, and ammonia using the Yuwono Hedonic Scale under field conditions. Instrument performance, panellist consistency, and the influence of meteorological conditions on odour perception were evaluated. The selected airflow velocity of 1 m/s yielded the highest ratings for odour detectability, comfort, and ease of assessment. Repeated ammonia measurements (3.4–3.5 ppm) produced highly consistent hedonic scores (−3.2 to −3.0), while ammonia concentration and hedonic scores followed a logarithmic relationship (R² = 0.9994). Mean hedonic scores for ambient air (−0.1), n-butanol (−1.3), and ammonia (−3.1) confirmed consistent panellist discrimination of odour characteristics.
Co-Authors Agus Kartono Akhiruddin Maddu Ardian Arif Arief Sabdo Yuwono Arjal Tando Bagus Irawan Claudia, Stephanie Daranrat Jaitiang Darwin Darwin Dede Heri Hanifan, Rahmah Asri Nurani Har, Nazopatul Patonah Harmiansyah Heriyanto Syafutra Herlina Herlina Husin Alatas Irwansyah Irwansyah Irzaman, Irzaman Lalu Teguh Permana M. Azhar Mustafid Mahfuddin Zuhri Muhandis Siddiq Padang, Welly Liku Permono Adi Putro Rahmayanti, Aisyah Rima Fitria Adiati Rustam Efendi Safrina Dyah Hardiningtyas Siti Hajar Siti Nikmatin Sudarmanto Jayanegara Sulaeman, Ahmad Sofyan Zagita, Wanda