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All Journal Jurnal Ilmu Dasar JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Saintek Lahan Kering PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Muhammad Miftahul Munir
Prodi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Mathematics Physics Public Health Other

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Desain dan Pengembangan Spektrofotometer Cahaya Tampak untuk Menentukan Absorbansi Maksimum dari Pewarna Makanan dan klorofil a Daun Bayam Aminah Nurrahmawati; Fadli Nauval; Muhammad Miftahul Munir
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 10 (2022): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2021
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.967 KB) | DOI: 10.21009/03.SNF2022.01.FA.08

Abstract

Abstrak Sebuah spektrofotometer cahaya tampak telah didesain dan dikembangkan dengan menggunakan LDR sebagai detektor cahaya. LED putih digunakan sebagai sumber cahaya. Sumber cahaya difilter terlebih dahulu dengan menggunakan kertas filter monokromatis dengan variasi warna ungu, merah, biru, hijau dan jingga. Sampel yang diujikan pada spektrometer berupa pewarna makanan (merah, jingga, hijau dan biru) serta klorofil a daun bayam. Persamaan Lambert Beer digunakan untuk mengukur nilai absorbansi dari sampel, dengan menghubungkannya ke tegangan keluaran rangkaian LDR. Tegangan keluaran yang digunakan pada perhitungan berupa tegangan keluaran sampel saat dikenai cahaya yang difilter, tegangan keluaran pelarut (air) dan tegangan keluaran pada keadaan tanpa cahaya. Setiap sampel memiliki nilai absorbansi yang bervariasi ketika disinari cahaya yang terfilter. Hasil penelitian mengindikasikan bahwa nilai absorbansi maksimum pada masing-masing pewarna makanan memberikan nilai akurasi yang sangat baik dimana sejalan dengan teori. Nilai absorbansi maksimum masing-masing pewarna makanan adalah : pewarna merah menyerap maksimum pada panjang gelombang warna hijau, pewarna biru pada warna jingga, pewarna jingga pada warna biru, pewarna hijau pada warna merah, dan klorofil a menyerap maksimum pada panjang gelombang warna ungu dan jingga. Kata-kata kunci: Spektrofotometer, LED putih, LDR, Persamaan Lambert Beer Abstract A simple visible light spectrophotometer has been developed and designed using LDR as photodetetector. White LED was used as light source. The light source was filtered using monocrhomatic (violet, red, blue, green, yellow, and orange) filter paper. The spectrometer was tested in several sampels, such as food s (red, orange, green and blue) and chlorophyll a of spinach. The result of measurement were output voltage and the Absorbance of sample (A). And by using Lambert Beer equation, the absorbance which corresponds to the voltage output of samples was calculated. Not only samples voltage output but any other parameters such as the voltage of solvent (water) and zero condition (with no light) were also measured. They were needed to be put in the equation for finding the absorbance of samples. The result of research indicated that the maximum absorbance value of each sample agreed with the theory, so it can be concluded that the results had good accuration. The maximum absorbance that was obtain of each sample i.e : food colourings (red, blue, orange and green) each one of them absorbed green, orange, blue and red. And chloropyll absorbed violet and orange. Keywords: spectrophotometer, white LED, LDR, Lambert Beer equation
Desain Jaringan Sensor Nirkabel untuk Pemantauan Suhu Dan Kelembaban Lingkungan Berbasis SMS Kostan D. F. Mataubenu; Muhammad Miftahul Munir
Saintek Lahan Kering Vol 2 No 1 (2019): JSLK Juni 2019
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.584 KB) | DOI: 10.32938/slk.v2i1.665

Abstract

Physical variables in everyday life that need to be monitored using a wireless sensor network are temperature and humidity. The advantages of using a wireless sensor network are to improve the resolution of the measurement data, to control remote application, to improve the efficiency, to control something in unreachable area and so on. Therefore, in this study a wireless sensor network were developed to monitor the temperature and humidity in environment based on short message system. The system was designed with a star topology consisted of two major parts, namely transmitter and the receiver. Transmitter consisted of XBee Pro RF module, microcontroller and sensor SHT10. Receiver consisted of XBee Pro RF modules that were connected with GSM module SIM900. Transmitters were placed on 3 points would send the measured data of temperature and humidity to the receiver, and then the data forwarded by short message system to destination phone number. The system has been tested and it works well.
Analysis and Determination of Self-Inductance through Direct and Indirect Measurements Methods Herawati, Herawati; Khotimah, Siti Nurul; Munir, Muhammad Miftahul
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 9, No 1 (2024): January 2024
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jipf.v9i1.4394

Abstract

Practicum is an activity that helps students to understand an abstract concept. One of the concepts in physics that requires practicum is the concept of electricity. Inductance is an electrical quantity studied in high and vocational high schools. This study aims to determine the inductor's inductance value using several methods and analyze the most suitable method for determining the inductor inductance value. The inductor used is a commercial inductor with a color band code with an inductance value of 2.7 mH and a tolerance of 10%. Inductor inductance measurements were carried out using a benchtop LCR meter, handheld LCR meter, series RLC method, and LC resonance method. Each measuring instrument requires a frequency setting: refer to the manual for benchtop and handheld LCR meters, the resonant frequency for the serial RLC method, and adjusting the AFG (arbitrary function generator) frequency. Hence, a clear oscillation pattern is visible on the oscilloscope. The results of this study indicate that measurements using benchtop LCR meters, handheld LCR meters, and LC resonance methods produce inductance values within the inductance tolerance limits.
The Effect of Nonwoven Microfiber Substrate Polypropylene Thickness to Air Filtration Performance of Polyacrilonitrille Nanofiber Rajak, Abdul; Syahputra, Tri Siswandi; Munir, Muhammad Miftahul; Khairurrijal, K.
Jurnal ILMU DASAR Vol 20 No 2 (2019)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1512.963 KB) | DOI: 10.19184/jid.v20i2.9658

Abstract

Since a nanofiber medium on itself is soft and fragile and cannot be used alone as air filters. Coating nanofiber on a rigid substrate to form a composite that can be handled readily is necessary. Beside can improve the filtration efficiency, adding the substrate will also save the use of nanofibers mat itself. The aim of this study is to evaluate the effect of substrate thickness on the performance of nanofibers mat in aerosol filtration in order to find the optimum thickness of substrate that can increase the quality of nanofiber filter. The substrate used was a low cost microfiber non-woven fabric made from polypropylene (PP). The nanofibers mat was composed of electrospun polyacrylonitrile (PAN) with concentration of 9 wt.% which dissolved at N,N dimethylformamide (DMF). Five variations of PP different in thickness was used as substrate. From the SEM image, it was found that there is increasing fiber diameter of PAN after electrospun into PP substrate. From the porosity estimation of each nanofiber, it was found that the porosity decreased with increasing the substrate thickness. For test the performance of nanofiber filter, the particles of polystyrene latex (PSL) which generated by atomizer was used as the aerosol particle. In addition, to evaluate the performance filter in PM2.5 filtration, the experiment was carried out with generate the smoke from burning incense. Air filtration performance of all variations is obtained by comparison the results of measurement including: pressure drop, efficiency and quality factor. From the results, there is limitation on the substrates thickness based on the value of the quality factor obtained. Overall, PP nonwoven as the substrates gives the great contribution on the efficiency of PAN nanofiber. Keywords: substrate, polypropylene, thickness, nanofiber, air filtration.
Co-Authors Aminah Nurrahmawati Fadli Nauval Herawati Herawati Khairurrijal Khairurrijal Mataubenu, Kostan D. F. Rajak, Abdul Siti Nurul Khotimah Syahputra, Tri Siswandi