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All Journal HAYATI Journal of Biosciences Jurnal Teknologi Dan Industri Pangan Jurnal Rekayasa Proses MATRIK: JURNAL MANAJEMEN, STRATEGI BISNIS, DAN KEWIRAUSAHAAN Diponegoro Journal of Accounting Microbiology Indonesia Jurnal Sains Dasar Jurnal Neutrino : jurnal fisika dan aplikasinya Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Jurnal Penelitian Pendidikan Jurnal Matematika & Sains Seminar Nasional Teknik Kimia Kejuangan JFA (Jurnal Fisika dan Aplikasinya) Jurnal Sistem dan Informatika Jurnal Repertorium JUTIK : Jurnal Teknologi Informasi dan Komputer Jurnal Rekayasa Proses WIDYABHAKTI Jurnal Ilmiah Populer Jurnal Ilmiah Sekolah Dasar Jurnal Pengabdian Magister Pendidikan IPA Jurnal Teknik Social, Humanities, and Educational Studies (SHEs): Conference Series JURNAL WIDYA GANESWARA Jurnal Pengabdian Masyarakat Bumi Raflesia Jurnal Pendidikan jurnal dikdas bantara Equilibrium Journal of Chemical Engineering Jurnal Riset Teknologi Pencegahan Pencemaran Industri ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Wasana Nyata Khidmatuna : Jurnal Pengabdian Kepada Masyarakat Biospektrum Jurnal Biologi Chemistry and Materials Benefit : Journal of Bussiness, Economics, and Finance SENAPAS WASANA NYATA Journal of Information System and Computer Jurnal Ilmu Fisika dan Terapannya (JIFTA) Jurnal Pengabdian Masyarakat dan Riset Pendidikan Precise: Journal of Economic Compile: Journal of Society Service LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI J-CEKI
Agus Purwanto
Jurusan Fisika, Universitas Islam Negeri Malang Jurusan Fisika, Institut Teknologi Sepuluh Nopember, Surabaya 60111
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Journal : Jurnal Ilmu Fisika dan Terapannya (JIFTA)

 1 
SISTEM KONTROL PENGADUK PADA ALAT PENGERING GABAH BERBASIS MIKROKONTROLER ATMEGA 8 MIXER CONTROL SYSTEM ON THE PADDY DRYER BASED ON MICROCONTROLLER ATMEGA 8 Niken Suprapti; Agus Purwanto
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 1 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakPenelitian ini bertujuan untuk mengetahui diagram blok sistem kontrol pengaduk, fungsi transfer sistem kontrol pengaduk dan  pola distribusi suhu gabah pada alat pengering. Diagram blok sistem kontrol pengaduk tersusun atas komponen penyusun sistem kontrol. Fungsi  transfer sistem kontrol pengaduk diperoleh dengan melakukan penelitian karakteristik masing-masing komponen penyusun sistem kontrol. Pola distribusi suhu gabah dalam tabung pengering diperoleh dengan menganalisis persamaan panas dimensi tiga menggunakan sistem koordinat silinder. Diagram blok sistem kontrol pengaduk tersusun atas blok sensor suhu 1, sensor suhu 2, potensiometer, mikrokontroler, optocoupler, transistor, relay, motor AC, pengaduk dan proses pengadukan. Fungsi transfer sistem kontrol pengaduk adalah perbandingan antara output alat pengering berupa suhu gabah dengan input pergeseran potensiometer. Pola distribusi suhu gabah menunjukkan bahwa suhu mengalami fluktuasi dari sumber panas sampai kulit dan tutup tabung pengering. Seiring bertambahnya waktu, fluktuasi berkurang sehingga distribusi suhu gabah menunjukkan pola steady-state. Kata kunci: diagram blok, fungsi transfer, pola distribusi suhu AbstractThe research aimed to determine block diagram of mixer control system, the  transfer function of mixer control system and the pattern of temperature distribution on the dryer. The block diagram of the mixer control system was composed of components of the mixer control system. The characteristics of each control system component  were studied to determine  the transfer function of the mixer control system. The pattern of temperature distribution in the tube dryer was obtained by analyzing the three dimensional heat equation using a cylindrical coordinate system.  The block diagram of the mixer control system was composed of block of temperatur sensor 1, temperatur sensor 2, potentiometer, microcontroller, optocoupler, transistor, relay, AC motor, mixer and block of mixer process. Transfer function of mixer control system was the ratio of the output of paddy dryer in the form of paddy temperature, were the input was potentiometer rate variations. The distribution pattern of paddy temperature showed that the temperature decreased with the temperature fluctuation from the heat generation to dryer tube cover. The fluctuation decreased with increasing time, so the paddy temperature distribution showed steady-state pattern. Keywords: block diagram, transfer function, pattern of temperature distribution
PENGARUH PEMAPARAN SUARA BELALANG “KECEK” (ORTHOPTERA) TERMANIPULASI PADA PEAK FREQUENCY 3000 HZ TERHADAP PERTUMBUHAN TANAMAN JATI (TECTONA GRANDIS, L.F) THE INFLUENCES OF THE SOUND EXPOSURE OF “KECEK” GRASSHOPPER (ORTHOPTERA) WHICH WAS MANIPULATED ON PEAK FREQUENCY 3000 HZ TOWARDS THE GROWTH OF THE TEAK (TECTONA GRANDIS, L.) TREES Sarasati Utami; Agus Purwanto
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 5, No 6 (2016): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakPenelitian ini bertujuan untuk mengetahui perbedaan morfologi tanaman perlakuan dengantanaman kontrol dan pengaruh intensitas bunyi yang tepat untuk pemaparan suara belalang “kecek”trmanipulasi pada peak frequency 3000 Hz. Obyek penelitian ini adalah 25 tanaman jati perlakuandan 25 tanaman jati kontrol. Suara belalang “kecek” dipaparkan setiap hari pada pukul 06.00 – 07.00WIB dan 16.00 – 17.00 WIB. Pengukuran tanaman jati meliputi tinggi batang, diameter batang,panjang daun, lebar daun, dan jumlah daun. Hasil dianalisis menggunakan Microsoft Excel. Datafrekuensi dan amplitudo suara belalang “kecek” dianalisis menggunakan program Spectra Plus. Hasilpenelitian menunjukkan bahwa suara belalang “kecek” (Orthoptera) termanipulasi pada peakfrequency 3000 Hz berpengaruh terhadap pertumbuhan tanaman jati terutama panjang daun, lebardaun, dan jumlah daun. Amplitudo suara yang tepat untuk tanaman jati yang diberi pemaparan suarabelalang “kecek” termanipulasi pada peak frequency 3000 Hz yaitu (-49,75±0,20) dB yang setaradengan (62,1±0,9 – 69±2) dB.Kata kunci : suara belalang “kecek” (Orthoptera), peak frequency 3000 Hz, pertumbuhan tanamanjati (Tectona grandis, L.f).AbstractThis research was purposed to know the difference morphology the treatment trees with thecontrol trees and the influence of the intensity of the accuracy sound to the grasshopper’s soundexposure which was manipulated on peak frequency 3000 Hz. The object of this research were 25treatment trees and 25 control ones. The sound of grasshopper was set daily from 06.00 am to 07.00am and 04.00 pm to 05.00 pm. The measuring of the trees included the height, and diameter of thetrunk, the length, the width and the amount of the leaves. The results are then analysed usingMicrosoft Excel. Data on the frequency and amplitude of the grasshopper sound analyzed usingprogram Spectra Plus. The results of the research indicated that the grasshopper’s sound exposuremanipulated at peak frequency 3000 Hz influence the growth of teak trees especially the length, thewidth and number of leaves. The accuracy of sound amplitudo which was appropriate for the teaktrees on peak frequency 3000 Hz was (-49.75 ± 0.20) dB which was equal to (62.1 ± 0.9 – 69 ± 2) dB.Keyword: sound of grasshopper, peak frequency 3000 Hz, the growth of teak trees (Tectona grandis,L.f).
RANCANG BANGUN SISTEM KONTROL KADAR AIR GABAH PADA ALAT PENGERING GABAH BERBASIS MIKROKONTROLER ATMEGA 8 DESIGN OF PADDY MOISTURE CONTENT CONTROL SYSTEM ON THE PADDY DRYER MACHINE BASED ON ATMEGA 8 MICROCONTROLER Adilia Rismawati; Agus Purwanto
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 1 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakPenelitian ini bertujuan untuk merancang sistem kontrol kadar air gabah pada alat pengering gabah dengan set point 14%, untuk mengetahui cara kerja sistem kontrol kadar air gabah dan untuk menganalisis pemodelan difusi massa air pada model gabah silinder. Sistem kontrol kadar air gabah menggunakan mikrokontroler ATMega 8 yang keluarannya mempengaruhi kondisi kerja saklar transistor sehingga memicu relay untuk menyalakan atau mematikan pemanas. Input dan output setiap blok sistem didefinisikan sehingga diperoleh diagram blok keseluruhan sistem. Pemodelan difusi massa air model gabah silinder dianalisis menggunakan persamaan moisture ratio dalam sistem koordinat silinder. Hasil penelitian menunjukkan bahwa sistem kontrol kadar air gabah bekerja dengan baik sesuai set point yang diinginkan. Saat kadar air gabah di atas 14%, pemanas menyala dan saat kadar air gabah kurang dari atau sama dengan 14% pemanas mati. Pola distribusi moisture ratio pada gabah mengalami penurunan disertai fluktuasi dari pusat koordinat. Semakin bertambahnya waktu, fluktuasi makin berkurang dan membentuk pola steady-state. Kata kunci: sistem kontrol, kadar air, gabah, difusi massa air. AbstractThis research aimed to design a paddy moisture content control system on the paddy dryer machine with a set point of 14%, to determine the working principle of the paddy moisture content control system, and to analyze modeling the mass of water diffusion on paddy cylindrical model. Paddy moisture content control system was designed by using an ATMega 8 microcontroller that the output could affect the working conditions of transistor that triggered the relay to turn on or turn off the heater. Then, each input and output of each block in the system was defined to obtain the block diagram of the whole system that described the working principle of the system. Modeling the mass of water diffusion on paddy cylinrical model was analyzed by using equation of mass diffusion on cylindrical coordinate system. The results showed that paddy moisture content control system can work well according to set point. If the paddy moisture content was above 14%, the heater will turn on and if the paddy moisture content was less than equal to 14%, the heater will turn off. The moisture ratio decreased from the center position coordinate with fluctuation. If time increases, the fluctuation diminished and formed a pattern of steady-state. Keywords: control system, moisture content, paddy, the mass of water diffusion
SISTEM KONTROL SUHU PADA ALAT PENGERING GABAH BERBASIS MIKROKONTROLER ATMEGA 8 TEMPERATURE CONTROL SYSTEM ON THE PADDY DRYER MACHINE BASED ON ATMEGA 8 MICROCONTROLLER Husnul Amri; Agus Purwanto
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 1 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakPenelitian ini bertujuan untuk mengetahui diagram blok sistem kontrol suhu pada alat pengering gabah beserta analisis fungsi transfer yang berlaku untuk sistem tersebut dan mengetahui laju transfer panas konveksi dalam tabung pengering gabah. Suhu di dalam tabung pengering gabah dikontrol menggunakan rangkaian sistem kontrol suhu yang tersusun atas dua masukan yang dibandingkan oleh mikrokontroler ATMega 8 yaitu output dari potensiometer (Vref ) dan feedback dari sensor suhu LM 35 DZ (Vsensor). Apabila hasil perbandingan (error) lebih dari 0, maka keluaran mikrokontroler pada port B.5 akan berlogika HIGH yang membuat saklar sistem (optocoupler dan transistor) mengaktifkan relay, sehingga arus AC akan mengalir ke pemanas dan menghasilkan energi berupa panas, begitu juga sebaliknya. Alat ini mampu mengendalikan suhu yang dibutuhkan untuk mengeringkan gabah, yaitu sebesar 50°C dengan waktu pengeringan selama (4-4,5) jam. Diagram blok dan fungsi transfer sistem kontrol suhu pada alat pengering gabah bekerja berdasarkan set point dari potensiometer dan feedback dari sensor suhu LM 35 DZ, yang menjadi acuan mikrokontroler dalam mengendalikan saklar dan aktuator sistem. Koefisien konveksi pada proses pengeringan diperoleh berdasarkan dua kondisi, yaitu sebesar (246,15±100) W/m2°C pada kondisi tabung tanpa gabah dan (-25±80) W/m2 °C pada kondisi tabung berisi gabah 3 kg. Kata kunci: sistem kontrol, suhu, alat pengering gabah, konveksiAbstractThis research aimed to know the block diagram of temperature control system on the paddy dryer machine and it’s transfer function analysis and to know the convection heat transfer rate inside the dryer tube. The temperature in the dryer tube was controlled by a circuit of temperature control system consisting of two inputs which were compared by ATMega 8 microcontroller. These were the output of the potentiometer (Vref) and feedback from the temperature sensor LM 35 DZ (Vsensor). When the comparison result (error) was higher than 0, then port B.5 of microcontroller would give HIGH logic output to the switching systems (optocoupler and transistor) and the relay would be activated, so that AC current would flow to the heater generating heat. Otherwise, when the error was 0, the relay would be inactivated and there was no heat generated by the heater. This machine was able to control the temperature required for paddy drying process at 50°C with (4-4,5) hour drying time. Block diagrams and transfer function of temperature control system on paddy dryer machine worked based on set point from the potentiometer and feedback from the temperature sensor LM 35 DZ, which became reference for microcontroller to control the switches and actuator system. Convection coefficient on the drying process were obtained in two different conditions, these were (246,15±100) W/m2°C when dryer tube was empty and (-25±80) W/m2°C when dryer tube was filled by 3 kg of paddy. Keywords: control system, temperature, paddy dryer machine, convection
PENENTUAN BESAR KECEPATAN BUNYI DI UDARA MENGGUNAKANMETODE TIME DIFFERENCE OF ARRIVAL (TDOA) DAN METODE ECHOBASED SPEED OF SOUND DETERMINATION DETERMINING THE SPEED OF SOUND IN AIR USING TIMEDIFFERENCE OF ARRIVAL (TDOA) AND ECHO-BASED SPEED OF SOUND DETERMINATIONMETHODS Nila Narumsari; Agus Purwanto
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 1 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakPenelitian ini bertujuan untuk mengetahui nilai besar kecepatan bunyi di udara menggunakan metode Time Difference ofArrival (TDOA) dan metode Echo-Based Speed of Sound Determination serta mengetahui perbandingan hasil pengukuran yang diperoleh dari kedua metode. Pada metode TDOA, loudspeaker digunakan sebagai sumber bunyi dan microphone berfungsi sebagai receiver yang diberi variasi jarak. Variasi jarak menghasilkan time delay yang akan ditampilkan di layar oscilloscope. Metode Echo-Based Speed of Sound Determination menggunakan sumber bunyi diskrit yang dibangkitkan software Matlab R2008a dan loudspeaker. Microphone yang sebidang dengan loudspeaker menangkap gelombang bunyi yang dipantulkan papan pemantul dan selanjutnya ditampilkan oleh personal computer yang telah ter-install software Audacity 2.1.2. Metode TDOA menghasilkan nilai besar kecepatan bunyi di udara dan ketidakpastian sebesar (346.1± 0.3) m/s, sedangkan pada metode Echo-Based Speed of Sound Determination diperoleh nilai sebesar (346.5 ± 0.6) m/s. Kata kunci:besar kecepatan bunyi di udara, TDOA, Echo-Based Speed of Sound DeterminationAbstractThis research aimed to know the speed of sound in air by using Time Difference ofArrival (TDOA) method and Echo-Based Speed of Sound Determination method and to compare the measurement results produced by both methods. In TDOA method, loudspeaker was used as sound source and microphone as a receiver at various distances. Distance variations produced time delay that would be displayed in oscilloscope’s screen. Echo-Based Speed of Sound Determination method was using discrete sound source generated by Matlab R2008asoftware and loudspeaker. Microphone placed in the same plane with loudspeaker received sound waves reflected by a reflector wall and then displayed by a personal computer with installed  Audacity 2.1.2 software. The speed of sound in air resulted by TDOA method was (346.1± 0.3) m/s and(346.5 ± 0.6) m/sby Echo-Based Speed of Sound Determination.Keywords: The Speed of sound on air, TDOA, Echo-Based Speed of Sound Determination
Co-Authors - Isdiyarto . HERNAYANTI . HERY WINARSI . Sumarna Abdurohman Muslim Achmad Choerudin Achmad Fatih Alqodri Adhitya Dharmawan Adi Novriansyah Adi Putra Setianto Adilia Rismawati Adimas Wahyu Saputro Adrian Nur Affan Irfan Fauziawan Agung Budiarto Agus Eko Prasetiyo Ahmad Imam Shofwan Ahmad Jibril Air Rangga Akbar Akhmad Gunawan Amelia Bahmiranda Anatta Wahyu Budiman Andi Bau Salman Andi Besse Nurul Adha Andi Dian Panca Lestari Andi Nurwana Andi Sumangelipu Angga Rahabistara Sumadji Anggun Nugroho Anisa Agni Putri Arif Jumari Arisman Ismail Asrul Jaya Bagaskoro Pranata Ardhi Bayu Dwi Hatmoko Bhagas Adhitya Ardia Pratama Budiwati Budiwati Bukman Lian, Bukman Citra Zaskia Pratiwi Cornelius Satria Yudha Cucu Wahyudin Decy Lukitasari Deddy Muchtadi Dian Nugraheni Elizabeth Putri Permatasari Endah Retno Dyartanti Endang Kwartiningsih Endang Mastuti Erlien Dwi Cahyani Erlinda Mandasari Esse Yuliani Faizin Adi Nugroho Farhan Amrilah Ahmad Farida ArIyani Farida Crisnaningtyas FRANSISKA RUNGKAT ZAKARIA Fuji Pratiwi Ganang Dwi Harjanto Habib Muhammad Zapar Hania nurbayti Hariani Herianto Saputra Herlik Wibowo HERNAYANTI HERNAYANTI HERY WINARSI Hidayah Dwiyanti Hikmatun Ni'mah Husnul Amri I Nengah Artawan I Wayan Karang Utama Ikha Rasti Julia Sari Iman Mawardi, Indra Heri Rukmana Indrianto Indrianto INGKA PRISILA Irma Charlin Oktaviani Izhary Siregar Joko Santoso Leo Eladisa Ganjari Lila Yuwana Lisa Ruliaty Maria Fatmadewi Imawati Maria Ginzania Mega Permata Rindi Meidiana Arinawati Miftakhul Hakam Mudinillah, Adam Muh. Sholihuddin Prisdan Muhammad Sai Firdaus Mulmeyda, Rinda Mulyoto , Nanik Indah Setianingsih, Nanik Indah Niken Suprapti Nila Narumsari Nilawati Nilawati Novarina Irnaning Handayani Nuril Furkan Oktita Earning Hanifah Pajar Machmud Paryanto Plapiana Yanti Purnomo Rafika Rahmawati Rahma Ayu Maharani Ramadhan Indra Setyawan Rame Rame Rame Rame Ratna Dewi Eskundari Ratnawati Ratnawati Reinardo Ramawijaya Widakusuma Renna Febryanita Rifqi Almusawi Rafsanjani RR Sri Handayani Sabrina Putri Chaerani Saida Mawarni Sarasati Utami Sari, Nurratri Kurnia Septia Lutfi Septiana Novita Dewi Shofwan Hanief Silvy Silvy Djayanti Sodikin . Sri Rustianti Rustianti, Sri Rustianti Suharjum Sumarno Sumarno Suratsih Suratsih Suwarto Suwarto Taufiq Bagus Prasojo Tika Paramitha Toni Suharto Ummi Nurul Herati Warsito Kawedar Wuri Wuryandani Yaser Krisnafi Yayan Diansyah Yohanes Dwi Saputra, Yohanes Dwi Yuan Mega