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All Journal Jurnal Periodic Jurusan Kimia UNP Sainstek Jurnal Penelitian dan Pembelajaran Fisika Jurnal Pengajaran MIPA Jurnal Pendidikan IPA Indonesia Jurnal Sosioteknologi Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Jurnal Pendidikan Biologi Indonesia JOIV : International Journal on Informatics Visualization INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Penelitian Pendidikan IPA (JPPIPA) Momentum: Physics Education Journal Spektra: Jurnal Fisika dan Aplikasinya JSKK (Jurnal Sains Keolahragaan dan Kesehatan) JURNAL EKSAKTA PENDIDIKAN (JEP) Bio-Lectura Kwangsan: Jurnal Teknologi Pendidikan Eksakta : Berkala Ilmiah Bidang MIPA Al-Ta'lim Pelita Eksakta Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Sainstek : Jurnal Sains dan Teknologi Indonesian Journal of Electrical Engineering and Computer Science Studies in Learning and Teaching Wahana Dedikasi : Jurnal PkM Ilmu Kependidikan Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika JURNAL MUARA PENDIDIKAN JRFES Journal of Experimental and Applied Physics

Yohandri

Department Of Physics, Universitas Negeri Padang

Author-ID : 2076569

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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AUTOMATIC CHICKEN EGGS HATCHER USING DHT 22 SENSOR and DC MOTOR GEARBOX BASED ON ARDUINO YUNALDI YUNALDI; - Yohandri
PILLAR OF PHYSICS Vol 14, No 2 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/11632171074

The hatching machine is one of the technological developments in the field of animal husbandry in increasing livestock productivity. Hatching eggs using an incubator is much more effective than natural/conventional breeding. The incubator is an incubator that has controlled temperature and humidity. Instruments used in the manufacture of hatching machines include a DHT 22 sensor which is used as a controller of temperature and humidity values, incandescent lamps are used as a heat source from the hatching machine, ultrasonic mist maker acts as a steam mist generator, DC motor is used as an egg turning rack driver, motor driver L298N acts as a DC motor movement controller, and Arduino Uno as a microcontroller that regulates all system work. This research was conducted with the aim of producing a hatching machine that is more complex and efficient. Based on data analysis carried out from the accuracy and thoroughness. The measurement accuracy ranges from 99.64% to 100%, while the measurement accuracy ranges from 99.64% to 100%, with an average measurement error of 0.178572%.

Pengaruh temperatur kalsinasi terhadap struktur tembaga oksida dari daerah Pinti Kayu Kecamatan Koto Parik Gadang Diateh Kabupaten Solok Selatan (The effect of calcination temperature on the copper oxide structure of the Pinti Kayu area, Koto Parik Gadang Diateh District, South Solok Regency) Robby Zeffry; - Ratnawulan; - Yohandri
PILLAR OF PHYSICS Vol 5 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The purpose of this study was to determine the levels of copper oxide content and analyze the effect of calcination temperature on the physical properties of copper oxide from Pinti kayu areas, district Koto Parik Gadang Diateh regency of Solok Selatan. This analysis is important to identify the quality of the copper ore. The characterization using X-ray Fluorescence (XRF) and X-Ray Diffraction (XRD). Based on measurement result (CuO) the percetage of coper oide is about 89.65%. The results of XRD analysis shows due to the influence of calcination temperature at a temperature of 145°C copper oxide structure changes from monoclinic to hexagonal structure at a temperature of 300°C, then at a temperature of 850°C into a cubic structure and at a temperature of 1000°C copper oxide into monoclinic structure

Fabrication of air tracks for kinematics and dynamics experiments based on ATMEGA328 microcontroller Even Triaga; Yulkifli Yulkifli; Yohandri Yohandri
PILLAR OF PHYSICS Vol 10 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Technological developments and the rapid advancement of science are caused by the increasing needs of human life. One of the disciplines that contributed considerably in the development of technology is physics. Important discoveries related to physics arise in the presence of physics experiments. The most important thing to consider in conducting a physics experiment is the set of experiments. The development of several sets of physics experiments with sensor-based digital systems has been developed, but not yet completely perfect, as in sets of kinematic experiments and dynamics. This study aims to determine the performance specifications and design specifications for the manufacture of Air Track For Kinematics and Atmega328 Microcontroller Based Instructions.This study included into laboratory experimental research. Data collection is done by measuring the quantities of physics contained in the magnitudes in kinematics experiments and dynamics. The measurement technique is a direct and indirect measurement. Direct measurements are made of the travel time of the object. Indirect measurements are made to determine speed, acceleration, and momentum. The data obtained through measurement and analyzed in two ways is statistically and graphically.Based on the results of data analysis can be disclosed some research results. First, this experimental set uses a promini microcontroller that works to process the output of the sensor and converts the sensor output to the desired output. The measurement result view of this experimental set uses the LCD. Sensor used is a photogate sensor that serves to measure the travel time of the object. Second, this experimental set has an average accuracy of 98.82% and an average accuracy of 92.13%. In addition, the phenomenon of perpendicular motion and straight-shifting motion can be well-regulated. Referring to the results of research that has been obtained stated that the developed air track can be used for kinematics experiments and dynamics

Pengaruh suhu sintering pada penyerapan gelombang mikro nanokomposit NiFe2O 4 / PVDF untuk material penyerap radar (Sintering temperature effect on microwave absorption of NiFe2O4 / PVDF nanocomposite for radar-absorbent materials) Moulia Fadhilah; - Ramli; - Gusnedi; - Yohandri
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Synthesis ofoNiFe2O4/PVDF nanocomposite with sintering temperature variations of 2500C, 280, 3000C, 3500C, 4500C has been done with the solgel method for microwave absorbing material (RAM).This material is to reduce reflections or absorb microwaves, so objects coated with RAM are not detected by Radio Detection and Ranging (RADAR). In making nanocomposite NiFe2O4 / PVDF, it includes the making of Fe3O4 precursor solution using iron sand, making NiFe2O4 solution, making NiFe2O4 / PVDF nanocomposite, printing, and sintering. The samples were characterized by XRD. FTIR and VNA. For the analysis of microwave absorption ability as measured by the Vector Network Analyzerr(VNA), and then maximum Reflection Loss (RL) number was obtained at theesintering temperature of 2800C at -27.5767 dB at aafrequency off11.20 GHz which the X-Band region with microwaveeabsorption in coefficient amounting to 0.0417989142. Nanocomposite NiFe2O4 / PVDF can absorb microwaves ~ 96% at a frequency of 11.20 GHz. So, NiFe2O4/PVDF nanocomposite is suitable for Absorbing Radar Material

THE EFFECT OF THE AMOUNT OF IMMERSION OF ZnO DOPING Ag THIN LAYER ON BAND GAP WITH DIP COATING METHOD Farhan El Maulid; - Yohandri; Hary Sanjaya
PILLAR OF PHYSICS Vol 14, No 2 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12135171074

The availability of fossil energy is decreasing day by day. Therefore, a New Renewable Energy solution is needed. One of the renewable energy is DSSC. DSSC is a photoelectrochemical-based solar cell that has a lower cost, less difficult preparation, and is environmentally friendly. DSSC be composed of working electrode, dye, electrolyte, and counter electrode. This researchintend to investigate the performance of the working electrode where the manufacture of a thin film using the dip coating method with variations in immersion and its effect on the efficiency of DSSC. This research is an experimental research. In this study, the semiconductor working electrode was made based on 9% ZnO/Ag synthesis by going through a sol-gel process. The working electrode was coated with variations of immersion 1, 3 and 5 times. The 9% ZnO/Ag thin layer was characterized by UV-DR Spectrometer. Based on the results, 9% Ag doped ZnO deposited on the ITO substrate with variations of immersion 1, 3 and 5 times showed, a band gap of 3.09 eV, 3.10 eV and 3.12 eV, respectively. Based on these data, it was applied to DSSC with the optimum efficiency shown at the electrode 1 time dip. Therefore, the greater the amount of immersion, the lower the efficiency of the DSSC.The availability of fossil energy is decreasing day by day. Therefore, a New Renewable Energy solution is needed. One of the renewable energy is DSSC. DSSC is a photoelectrochemical-based solar cell that has a lower cost, less difficult preparation, and is environmentally friendly. DSSC be composed of working electrode, dye, electrolyte, and counter electrode. This researchintend to investigate the performance of the working electrode where the manufacture of a thin film using the dip coating method with variations in immersion and its effect on the efficiency of DSSC. This research is an experimental research. In this study, the semiconductor working electrode was made based on 9% ZnO/Ag synthesis by going through a sol-gel process. The working electrode was coated with variations of immersion 1, 3 and 5 times. The 9% ZnO/Ag thin layer was characterized by UV-DR Spectrometer. Based on the results, 9% Ag doped ZnO deposited on the ITO substrate with variations of immersion 1, 3 and 5 times showed, a band gap of 3.09 eV, 3.10 eV and 3.12 eV, respectively. Based on these data, it was applied to DSSC with the optimum efficiency shown at the electrode 1 time dip. Therefore, the greater the amount of immersion, the lower the efficiency of the DSSC.

Fabrication of a 2.4 GHZ XBEE wireless communication system with sent data to support the measurement of the tipping vessel rainfall at the BMKG Sicincin Risa Noviarti; Asrizal Asrizal; Yohandri Yohandri
PILLAR OF PHYSICS Vol 9 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Information of rainfall is required in agricalture to determine kind of plant wich is suitable planted in certain area. A rain gauge had used in BMKG Sicincin wastipping bucket raingauge model TB3-0.2 serial no.92-459. This rain gauge can not be used because its data loggeris damage. Based on reality, researcher was interested to give solution by making wireless communication XBee in this rain gauge for sending data to PC. The goal of this research is to explain performance and design specification of system. Kind of this research is engineering research. Measurement technique and collecting data was executed by directly and indirectly measurement. Directly measurement was used to measure output of sensor and time of count. Indirectly measurement was used to determine accuration and precision of rain gauge. The data was analysed by using descriptive statistic and graph method. Mechanic part of system consist of tube, funnel and tipping bucket , while electronic part of system consist of sensor circuit, microcontroler circuit, RTC circuit, transmitter circuit and receiver sircuit. Precision of rain gauge in laboratory testing is 0.86, its average of accuration is 0.93 andrelative precision data transmition is 1. Accuration ofrain gauge in field testingis 0.92

Rancang bangun detektor ketinggian air di landasan pacu pesawat terbang berbasis internet of things (Water level detector fabrication design on an airplane runway based on the internet of things) Puti Aulia Mardiah; - Yohandri
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The runway of an aircraft is designed to keep it dry even if it rains to avoid hydroplaning. Hydroplaning is a plane slip on the runway due to standing water. In accordance with regulations from the Airport Directorate, DGCA NO. KP 212 in 2017, the operational requirement for runways to be able to serve landings and aircraft flights is when there is a maximum of 3 mm of standing water on the runway surface. The design of the water level detector on the runway uses the Arduino Mega 2560 as a microcontroller which processes and sends the detected data to the thingspeak via the internet network. Performance specifications for water level detectors are water level sensor designs, U detector pipes, runways, electronic circuits. The water level sensor is a touch sensor that is designed and printed on a PCB board with horizontal and vertical strip designs. However, the level of accuracy and accuracy of the vertical sensor strip design is higher than the horizontal sensor strip design. Detected data will be processed in Arduino Mega 2560 and typed into the thingspeak page using the internet network. Data output can be accessed via a PC or smartphone connected to the internet network. The results of comparison with standard tools found the average percentage of errors for the horizontal sensor strip design was 97.08% while for the vertical sensor strip design was 4.98%. From the comparison results, the average percentage of accuracy for the horizontal sensor strip design is 8.57% and for the vertical sensor strip design is 95.01% with precision of 42.32% and 84.77%.Keywords : Arduino Mega 2560, Internet Of Things, thingspeak, sensor strip design

Pembuatan alat ukur kedalaman air menggunakan sensor sonar (An instrument to measure the water depth using a sonar sensor) Citra Syefriana; - Yohandri
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Technological developments in various fields encourage humans to apply technology, including in fields related to water. The community uses the river as one of the infrastructure of water transportation, tourism, fisheries and trade. So that the depth of the waters is one of the important factors in the activities of the population, especially in relation to river utilization. a sensor that can detect water depth is a sonar sensor using Aquino as a micro controller sends via the HC-05 Bluetooth module and displays on Android via Bluetooth after installing an electronic Bluetooth application. This research is a study that explains the design and performance specifications. Design specifications explain the accuracy and distance accuracy, while performance specifications explain the performance of measuring instruments. The measurement technique used is direct and indirect measurement. Direct measurements carry out by comparing data using standard gauges and water depth meters. Whereas indirect measurement by analyzing the accuracy and accuracy of distance. Based on the results of the research that has been done of the accuracy, an obtained fairly good distance with an average percentage of 99,37% relative accuracy, an average relative error of 0,63%. The accuracy of the distance was taken 118 cm to, in the largest relative error percentage of 0,42% and an average accuracy of 99,58%. While The accuracy of the distance was taken 206 cm to, in the largest relative error of 0,97% and an average accuracy of 99,61%.

Pengembangan sistem pengaturan kuat tekanan pada alat screen coating untuk membuat lapisan tipis berbasis arduino uno (Development of a pressure strength control system for screen coating tools to make thin films based on Arduino Uno) Rahmatul Fitria; - Yohandri
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Thin layer is a layer made of very thin material with a scale between nano and millimeter. To get a good quality coating, there are several methods that can be used, one of which is the screen coating technique. Screen Coating technique is a coating technique by pouring percusor and then swept it using a rubber rack. In the Screen Coating technique, the size of the substrate used depends on the design made, so that the substrate can be larger than the size of the Dip Coating and Spin Coating substrate. Speed and pressure are very much against the coating produced and for the speed used by Arduino Uno. This research is an experimental study, while this study describes the design specifications and performance design of a Screen Coating tool. Performance specifications describe the performance of the screen coating, while the design specifications explain the accuracy and accuracy of the screen coating. The measurement technique used is direct and indirect measurement. Data obtained directly from the pressure, then data from indirect measurements obtained by analysis of the accuracy and accuracy of the pressure. Based on the results of research that has been done, obtained accuracy from a pretty good pressure with the largest percentage of 2% and an average accuracy of 99.01%. The accuracy of the pressure is quite good, with an average error percentage of 1.66% and an average accuracy of 99.2%.

Development of a dip coating tool for thin layer growers based on the Raspberry Pi 3 Inandita Mardhiyah; - Yohandri
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

v>Low cost and precise is a concern in developing instruments for thin-film manufacturing. In this paper, alow-cost dip-coating instrument based on Raspberry pi will be presented. In this work, Raspberry Pi 3 wasadopted as a microcontroller for digital data processing. In addition, this tool is also equipped with a user-friendly interface system that is easy to operate by the user. An addition, the Python programming language is also adopted in the development of programming on the Raspberry Pi 3. Furthermore, the Raspberry Pi is alsoneeded to build an interface on the tool with the Qt designer framework. The results of device configurationssuch as withdraw speed and immersion time can be stored in the data logger system that has been developed inthis equipment. The performance and characteristics of the equipment have been tested and produce excellentcharacteristics and performance that meet the criteria for the production of thin film. Based on the results, a dipcoating based on Raspberry pi can be applied to the production of thin film in nanomaterial technology.

Co-Authors - Asrizal - Asrizal - Asrizal, - - Yulkifli - Yulkifli Abdul Razak Adibil Mahdi Rahmad Hidayat Ahmad Fauzi Al Khudri Sembiring Alex Sandryadi Alfindri Zulkarnaini Ali Amran Alvissda Damai Ananda Putra Angela Widiya Pratama Angga Saputra Anggraini Anggraini Apriani Sijabat Arif Farma Putra Asrizal Asrizal Asrizal Aulia Asman Auliya Sifa Fauziyyah Bastian Wahyudi Cahyati, Mona Trisna Citra Syefriana Deski Beri Desnita Dewi Puspa Sari Dewi Puspa Sari, Dewi Puspa Diliarosta, S. Dinata, Marta Djusmaini Djamas Elfiana Lathifa Rahma Emafri, Wenda Erin Ficrah Huda Even Triaga Fanny Rahmatina Rahim Farah Sarjani Farah Sarjani Farhan El Maulid Fauzan Al Haqqi Festiyed Festiyed Festiyed Fitra Maryulis Fitri Afriani Fitri Arsih Fitri Arsih Fuja Novitra Gusnedi Gusnedi Gusnedi, - Hamdi Rifai Hanifa Yoanda Hardeli Hardeli Hary Sanjaya Hary Sanjaya Hary Sanjaya Hary Sanjaya Hasbi Azis Heri -Maryono Heron Tarigan Hufri Hufri Ilham Alimuddin Ilham Hafidzh Wijaya Inandita Mardhiyah Indang Dewata Irena Retno Damayanti Irfan Muhammad Zaqi Irfandi Irfandi Josaphat Tetuko Sri Sumantyo Joshapat T. Sri Sumantyo Khairat, Raudhatul Khairunnisa Khairunnisa Komaini, Anton Kurnia Ashadi Laila Suryani Lily Handayani Linda Winiasri Maisa Fitri Marlince NK Nababan Marlince NK Nababan Minda Azhar Minda Azhar Mirza Muhammad Waqar Mitri Selisne Moulia Fadhilah Muhammad Gani Ariski Muhammad Irsyad Muhammad Rahfiqa Zainal Naurah Nazhifah Nilam Nilam Nofi Yendri Sudiar Nur Anisa Sati’at Nurhafizah Nurhafizah Nurhasanah Nurhasanah Nurhasnah, Nurhasnah Nurul Ihsan Palma Juanta Palma Juanta Puti Aulia Mardiah Putra, Ananda Putri Ayu Putri Yuliana Mahardika Putri, Yosa Aulya Rahadian Zainul Rahma Sari Rahma, Mila Devita Rahmat Dito Tri Wicaksono Rahmatul Fitria Rahmi Sukmawati Ramli Ramli Ramli Ramli Ramli Ramli Ramli, - Raudhah Awal Ridho Pratama Rikizaputra Rikizaputra Rio Anshari Risa Noviarti Robby Zeffry Robika Alkadri Roza, Media S. Solheri Sari, Yulis Septianas Selisne, Mitri Siltri, Dina Mulya Silvi Yulia Sari Siregar, A. M. Siti Aisyah Suci Ramadhani Sudarma, T. F. Surahman, D. Syafriani Syafriani Syufrawardi Syufrawardi Tomi Apra Santosa Ulfa Fadhilah Ulianas, Alizar Umar Kalmar Nizar Usmeldi Usmeldi Venezia Ferly Wiranda Viskia Manelza Vivi Wulandari Vivi Wulandari Wahyuni Satria Dewi Wahyunita Wulandari Wandika Wenda Emafri winni suhadi Yenni Darvina Yohanna Dasriyani Yohanna Dasriyani Yosi Dwi Anggreni Yulhendri Yulhendri Yulis Septianas Sari Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli YUNALDI YUNALDI Yurnetti Yurnetti Zulhendri Kamus Zulpadrianto Z Zulyusri Zulyusri Zurian Affandi

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