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All Journal Jurnal Natur Indonesia JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Journal of Multidisciplinary Applied Natural Science Journal of Energy, Material, and Instrumentation Technology Jurnal Abdimas Kartika Wijayakusuma Makara Journal of Technology
Sri Wahyu Suciyati
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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PRODUKSI ALAT ORBITAL SHAKER DENGAN PENGATUR WAKTU DAN KECEPATAN PUTAR MENGGUNAKAN POTENSIOMETER BERBASIS ARDUINO UNO Vicias, Icha Arum; Pauzi, Gurum Ahmad; Ayu, Humairoh Ratu; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 1 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i1.219

Abstract

Mixing solutions is an everyday activity performed in laboratory spaces. Mixing solutions manually by shaking is less effective, as it takes a long time and requires much effort. Therefore, an orbital shaker has been created to mix solutions with a digital unidirectional movement. This device is designed using a DC motor as the driver, an L298N motor driver, an Arduino Uno as the processor, a potentiometer to adjust the speed and rotation time, a seven-segment TM1637 display to show the set values, and push buttons as start and reset buttons. Testing the orbital shaker begins by inputting PWM values on the potentiometer and then measuring the DC motor's rotation speed (rpm) using a tachometer. The calibration testing includes calibrating the rotation speed values (rpm) and time. The results of rotation speed calibration testing show an average error value of 1.09%, accuracy of 98.91%, and precision of 99.77%. In comparison, time calibration yields an average error value of 2.45%, accuracy of 97.55%, and precision of 99.99%. Subsequently, speed testing is conducted using a solution load ranging from 100 to 1000 g, with each increment of 100 g testing rotation speeds from 240 to 360 rpm. The results indicate that when a load is applied, there is a decrease in the measured rotation speed compared to the input speed. The orbital shaker can rotate within a speed range of 240 to 374 rpm and a maximum time of 90 minutes with a maximum load of 1000 g.
Pengaruh Hidrolisis Asam pada Pembuatan Nanoselulosa dari Swietenia mahagoni Gultom, Rysa Sonya Reni Paulin; Manurung, Posman; Karo Karo, Pulung; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 4 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i4.184

Abstract

The extraction of the mahogany pulp as the main ingredient for the preparation of nanocellulose was carried out using the acid hydrolysis method. Sulfuric acid (H2SO4) was used to hydrolyze the primary constituent and sodium hydroxide (NaOH) was utilized in the delignification process. The purpose of this study is to identify the properties of nanocellulose made from mahogany hardwood on fluctuations in H2SO4 concentrations, particularly on concentration 19, 29, 39, and 45%. A Fourier Transform Infrared (FTIR) spectrophotometer, Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) were used to analyze the sample product, which is cellulose nanocrystal powder. The XRD results stated that the diameter of the nanocellulose crystal size ranged from 3-6 nm, while the SEM results showed that the sample's morphology resembled a stacked arrangement of stones. Meanwhile, the results of the FTIR indicated that the functional groups produced consisted of hydroxyl, aliphatic, aromatic rings, aryl carbonyls, and pyranose. Based on the tests, the best sample is obtained as a concentration variation of H2SO4 39%, which produces a diameter of 3.6 nm with a crystallinity index as high as 80.48%.
Prototype of a Floating-Type Nanohydro Generator as a Lighting Energy Source for Agricultural Land Pauzi, Gurum Ahmad; Putra, Dio Aditia; Supriyanto, Amir; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 1 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i1.202

Abstract

A floating-type nano-hydro generator prototype has been developed as a source of electrical energy for lighting in agricultural areas. This generator is designed to produce electrical energy without modifying the flow medium, making it easy to apply in various water channels such as irrigation systems, small rivers, and large rivers, as the generator can automatically adjust to the ebb and flow of water. The electricity generated benefits agricultural lands far from PLN (Indonesia's state electricity company) power sources. The average voltage produced in this study was 19.19 volts, with an average generator speed of 30.1 rpm and a turbine speed of 104.4 rpm. Meanwhile, testing results showed voltages ranging from the lowest rotation of 8 volts to the highest rotation of 56 volts. The voltage output from this device can be used to power lights or other small electrical needs.
Enhancing Electrical Characteristics in a High-Power Seawater Battery: Solutions with Acid Zinc Anolyte and Alumina-Carbon-Cement Separator Pauzi, Gurum Ahmad; Surtono, Arif; Suciyati, Sri Wahyu; Syafriadi, Syafriadi; Samosir, Ahmad Saudi; Sulistiyanti, Sri Ratna; Simanjuntak, Wasinton
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.267

Abstract

The potential of seawater as a source of galvanic cell energy has not been fully realized due to significant challenges, particularly anode degradation in single-compartment high-power seawater batteries. This study addresses these limitations by introducing a novel two-compartment system, utilizing an acid zinc anolyte and an alumina-carbon-cement separator designed to enhance both the electrical performance and longevity of the battery. Experimental results demonstrate a remarkable increase in current output (97.81 times) and a substantial boost in power (5.25 times) compared to conventional single-compartment cells. Furthermore, the internal resistance of the system is reduced by 95.7%, indicating improved energy transfer efficiency. The use of the alumina-carbon-cement separator effectively mitigates anode corrosion, a common issue that limits the operational lifespan and reliability of seawater batteries. These findings suggest that the proposed two-compartment configuration not only overcomes critical technical barriers but also offers a promising and sustainable alternative for renewable energy generation from seawater. The enhanced performance and durability of this system highlight its potential for practical applications in marine and coastal energy harvesting, contributing to the advancement of clean energy technologies.
Electrical Design and Characterization of Plant Microbial Fuel Cell (PMFC) Using Water Hyacinth Plants with Variation of The Amount of Water and The Effect of Sunlight pubiyanti, Intan; Suciyati, Sri Wahyu; Apriyanto, Donni Kis; Supriyanto, Amir
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 2 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i1.155

Abstract

Research on Plant Microbial Fuel Cells (PMFCs) has begun to develop, and various types of plants have been used. This research has realized PMFC using hyacinth plants by diversifying the amount of water and the effects of sunlight. The electrical properties of PMFCs aim to determine the effect of variations in the amount of hyacinth and sunlight on the power generated. In the reactor, the electrodes used are Cu and Zn plates. Data were collected by placing three reactors outdoors for 14 days or 331 hours. Based on the study's results, PMFC in reactor c, containing three clumps of hyacinth, obtained greater electrical power than in reactors A and b. The maximum electrical power is 6.31 mW on the 61st hour or 3rd-day measurement at 13.00 WIB. PMFC produces greater electrical power in external conditions than in internal conditions.
Manufacture of Nanocellulose from Red Onion Peel Waste Using Acid Hydrolysis Method with Variation of H2SO4 Concentration Shabrina, Shabrina Yakosati; Manurung, Posman; Suciyati, Sri Wahyu; Karo, Pulung Karo
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 2 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i2.172

Abstract

The manufacture of nanocellulose from red onion peel waste has been carried out using the acid hydrolysis method using H2SO4. This study aims to determine the effect of variations in the concentration of H2SO4 on the size of nanocellulose crystallites from onion peels and the surface morphology of nanocellulose from onion peels. The manufacture of nanocellulose was carried out in three stages, namely delignification using 10% NaOH to remove lignin and hemicellulose, bleaching using 10% H2O2 for bleaching and isolation of nanocellulose using H2SO4. The variation of H2SO4 used is 5; 10; 15 and 20%. The characterizations used are XRD (X-Ray Diffraction) and SEM (Scanning Electron Microscopy). The results of XRD characterization showed that the crystalline phase contained at the highest diffraction peak and the optimum concentration of H2SO4 to make nanocellulose from onion peel was 20%. The results of SEM characterization showed that the morphology of the onion peel nanocellulose was still united to form bundles or agglomerates.
An Analysis of Data Acquisition System of Temperature, Oxygen, and Carbon Dioxide in Refrigerator with Arduino Mega 2560 Suciyati, Sri Wahyu; Hidayatullah, Muhammad Syarif; Pauzi, Gurum Ahmad
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 10 No 1 (2021): 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.v10i1.7452

Abstract

The influence of storage room conditions can cause the quality of post-harvest fruit to decline, so monitoring is necessary. Monitoring is carried out using a data acquisition system designed to measure the temperature, oxygen, and carbon dioxide in the refrigerator storage room automatically. System design is divided into two stages, namely hardware design and software design. The hardware is composed of a sensor unit, a data processing unit (Arduino Mega 2560), and a display unit. On the other hand, the software uses the Arduino IDE. The test results of temperature (DS18B20), oxygen (Figaro KE-25), and carbon dioxide (MH-Z14a) from the system obtained an accuracy value of 98.29% with an error of 1.71%; 98.57% with an error of 1.43%, and 94.58% with an error of 5.42%. The device can display real-time measurement data output to 20x4 LCD with IIC and save the data on a micro-SD card.
Rancang Bangun Alat Deteksi Kadar Kolesterol Dalam Darah Dengan Teknik Non Invasive Berbasis Mikrokontroler Wemos D1 R1 Yuniar, Noeris; Supriyanto, Amir; Ayu, Humairoh Ratu; Suciyati, Sri Wahyu
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 3 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.213

Abstract

Cholesterol level checks are generally performed either invasively or using a portable blood test strip. It requires a long laboratory analysis time and causes pain in the body, so a non-invasive tool is needed to check cholesterol levels. The study aims to detect cholesterol levels in the blood with a non-invasive technique based on the Wemos D1 R1 Microcontroller using the DS100A Oximeter Sensor. This tool is equipped with a Liquid Crystal Display (LCD) as a cholesterol level display and an LED light as a cholesterol level indicator that will light up red when cholesterol is high (>=240 mg/dL), light up yellow when cholesterol is at the high limit (200-239 mg/dL), and light up green when cholesterol is normal (<=200 mg/dL). Cholesterol level measurement is done by utilizing the red LED light emission on the sensor attached to the finger. Then, the photodiode will capture the light intensity from the red LED into a voltage value. A 10-bit ADC on the microcontroller then reads the voltage value. The ADC value was then converted into a cholesterol level in milligrams per deciliter (mg/dL) using a linear regression equation. The designed device is capable of detecting cholesterol levels in the range of 150-240 mg/dL. Test results indicate that the non-invasive cholesterol level test device has been successfully developed, with a precision of 98.85% and an error of 1.15%. Accuracy testing yielded a value of 97.14% with an error of 2.86%.
The Effect of NaOH on the Synthesis of Nano ZnO Using Red Betel Leaves (Piper crocatum) by Green Synthesis Method Nurcahayaniati, Hikmah; Manurung, Posman; Suciyati, Sri Wahyu; Asmi, Dwi
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 3 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.227

Abstract

ZnO has been produced using a green synthesis method. This research aims to determine the effect of  NaOH variations on ZnO nanoparticles obtained using red betel leaf extract. The variation of  NaOH used is 0,2; 0,4; 0,6;  the characterization carried out was Fourier Transformation Infra Red (FTIR), X-Ray Difraction (XRD),   Scanning Electron  Microscopy (SEM), dan Ultra Violet Vissible (UV DRS) the results of FTIR  characterization show that the functional groups in red betel leaves play a role in the information of  ZnO nanoparticles, XRD characrerization shows diffraction peaks of ZnO nanoparticles and the presence of NaNO3 phase at 0,2; 0,4; 0,6; and 1 M variation. Then, the SEM results showed a spherical morphology at a 1 M variation, and the UV-DRS results showed an absorption peak at 331 nm and a band gap energy of 3.11 eV.
Pelatihan Penyusunan Standar Operasional Prosedur (SOP) Berstandar ISO 9001 untuk Standardisasi Pengelolaan Laboratorium IPA SMP Supriyanto, Amir; Suciyati, Sri Wahyu; Pauzi, Gurum Ahmad; Junaidi, Junaidi; Aprilia, Ayu
Jurnal Abdimas Kartika Wijayakusuma Vol 6 No 3 (2025): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v6i3.1081

Abstract

Laboratorium merupakan jantung dari pembelajaran IPA. Pembelajaran IPA yang menyeluruh wajib mengaktifkan penggunaan laboratorium. Namun, pengelolaan Laboratorium IPA khususnya di SMP Kabupaten Lampung Timur belum terstandarisasi dengan baik. Standarisasi dalam bentuk SOP merupakan hal penting untuk panduan pelaksanaan praktikum, pengelolaan alat dan bahan hingga masalah keselamatan. Merujuk dari fenomena tersebut, tujuan pelatihan ini untuk meningkatkan kemampuan guru IPA dalam penyusunan SOP berstandar internasional ISO 9001:2015. Peserta pelatihan mencakup guru-guru IPA SMP di Kabupaten Lampung Timur. Pelatihan menerapkan tiga metode yaitu pemberian materi, praktik penyusunan SOP, dan presentasi dokumen. Evaluasi kegiatan untuk mengukur pemahaman peserta diukur dengan ujian pre-test dan post-test dan diperoleh kenaikan rata-rata sebesar 43,22%. Selain itu, pelatihan ini berhasil menghasilkan enam dokumen SOP yang telah berstandar ISO 9001:2015. Hasil ini menjadi indikator tercapainya tujuan pelatihan. Dokumen SOP berstandar ISO 9001:2015 yang telah disusun peserta siap diimplementasikan di sekolah masing-masing.
Co-Authors Abd. Rasyid Syamsuri Abidin, Ramadhani Aewaditha, Randha Kentama Ahmad Saudi Samosir Akhmad Dzakwan, Akhmad Anggraini, Anisyah Aprilia, Ayu Apriyanto, Donni Kis Dika, Mahardika Setiawan Dwi Asmi Dyan Isworo Gultom, Rysa Sonya Reni Paulin Gurum A P Gurum A P, Gurum A P Hasibuan, Febriandi Humairoh Ratu Ayu Junaidi Junaidi Karo Karo, Pulung Karo, Pulung Karo Mega Pertiwi, Mega Muhammad Syarif Hidayatullah, Muhammad Syarif Nurcahayaniati, Hikmah Pauzi, Gurum Ahmad Posman Manurung Prastica, Lusia Pubiyanti, Intan Putra, Dio Aditia Putri, Faradilla Nabila Rifqah, Raden Ayu Nurfadhillah Sahtoni Sahtoni, Sahtoni Shabrina, Shabrina Yakosati Sitohang, Rosanti Sri Ratna Sulistiyanti Suharyadi, Edy Suprihatin Suprihatin Supriyanto, Amir Supriyanto, Amir Surtono, Arif Suryani, Mei Susi Harnani, Susi Syafriadi Syafriadi Vicias, Icha Arum Warsito Warsito Warsito, W Wasinton Simanjuntak Yanti Yulianti Yuniar, Noeris