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RANCANG BANGUN SISTEM ANTARMUKA KOMPUTER UNTUK PENGHITUNGAN LAJU ALIRAN KALOR KONDUKSI PADA MATERIAL PADAT MENGGUNAKAN PROTOKOL RS485

YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
Publisher : YOUNGSTER PHYSICS JOURNAL

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This research is about computer interface system for determining conduction heat flow rate on massive material using RS485 protocol. The system can be used for monitoring equipment in an industrial feasibility by measuring the rate of heat flow simultaneously at some measuring points of each measurement point that consists of some channels.Heat flow rate monitoring system uses temperature sensor LM35. This sensor serves to convert the temperature into a voltage whose  the results converted into digital signals by the ADC0 and ADC1 microcontroller which then signals are transmitted to the computer using the RS485 protocol.This system has been realized and can display the measured temperature at two different measurement points with two input channels and this system can also calculate the heat flow rate of each its points. The obtained results can be displayed graphically and also can be stored in Microsoft Excel. Keyword : heat flow rate, RS485 protocol, monitoring system, temperature sensor LM35

Rancang Bangun Sistem Pencitraan Menggunakan Gelombang Ultrasonik Dengan Metode Time of Flight

YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
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Abstract Research about imaging using ultrasonic wave with Time of Flight method has been carried out. This research purposed in defining image of underwater object surface. This system really worths to defining surface contour and also surface, leak and crack of pipe. This system consists of ultrasonic pulse generator, stepper motor driver, and underwater imaging system application. Microcontroller used as pulse trigger on IC 74HC221. Obtained pulse then stabilizes by IC 74HC00. Afterward, pulse gets amplified by pulse amplifier, transistor 2N3906 and MOSFET IRF 840, as results, sensor could vibrate and produces ultrasonic wave. Time of flight could be determined by counting delay time while pulse emitted and received back. Received echo signal transducer amplified by Op-Amp LF356. It also compared by comparator LM339. Echo signal transfer by microcontroller to computer through serial communication RS-232. Microcontroller output signals were amplified by transistor BD139 and TIP31 then stepper motor could be work. Data acquisition for depth carried out at 150 points at x-axis and 15 points at y-axis. This system has been realized and could shows and save the results in 3D graphics format. Testing results of system showed imaging system has linear correlation value R=0,999 and SD=0,051.   Keywords : ultrasound wave, imaging and Time of Flight

RANCANG BANGUN SISTEM AKUSISI DATA SENSOR MAGNETIK EFEK HALL UGN3503 MENGGUNAKAN KOMPUTER

YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
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This research is conducted a construction of data acqusition system of magnetic Hall effect sensors UGN3503 using computer. The system made consists of magnetic Hall effect sensors UGN3503, deferential amplifier, and mikrokontroler ATmega8535 minimum system. Magnetic Hall effect sensors UGN3503 is a magnetic field detecting sensors. The output voltage when there is no magnetic field is half of VCC. Therefore, the diferential amplifier is needed. Then, the coercing result is in the from of analogue signal. This analougue signal will be converted by ADC  internal ATmega8535 into digital data in 10 bit format. Data is transmitted by the USART that is series communication mode on ATmega8535 through RS-232 interface. The result of the data can be in the form of chart that can be shown on computer using Borland Delphi 7.0 and can be saved into Microsoft Excel. This system has been realized and can perform the final result in form chart and also can be saved. The result of the tool and sensor characteristic test with linear correlation coefficient value R = 0.995 to standard tool. Keyword: magnetic Hall effect sensors UGN3503, deferential amplifier, mikrokontroler ATmega8535 minimum system, ADC, USART

RANCANG BANGUN ALAT PENGUKUR DISTRIBUSI KUAT PENERANGAN MULTI TITIK MENGGUNAKAN SISTEM KOMUNIKASI RS485

YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
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ABSTRACT Meassuring illuminance system was created used multipoint model. The used light sensor was LDR that created used voltage devider model . AVR ATMega8535 microcontroller was used as a data acquisition device and a serial data transmission to a computer. Output of sensor was inserted into the microcontroller ADC input at ADC0 pin. Measured data of the LDR sensor would be processed by AVR ATMega 8535 microcontroller, then sent to a computer using a serial RS485 protocol. The data was interfaced with Borland Delphi7 and saved on Microsoft Excel. From this research, it was found the measurement from 4 terminal systems which each terminal sistem consist of one measurement point. From the four test systems performed by standard luxmeter obtained equipment precision of device that is made between R = 94.84%, until R = 99.05%. Key words: Illumination, LDR, RS485 communication system

Penentuan Nilai Resolusi Spasial Pada Citra Ultrasonik Metode Time of Flight Menggunakan Fungsi Sebaran Titik (Point Spread Function)

YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
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Abstrsct Ultrasonic wave have been familiarly applicable in many fields, imaging system is one of example. Spatial resolution value from obtained image plays important role in imaging system, therefore it could defining smallest object which detectable by its imaging system. On the research of determining spatial resolution is done using point spread function (PSF). Ultrasonic wave imaging system which have been conducted consist of transmitter and receiver series, mechanic activator, microcontroller series and also interfaces application and time of flight splitter. Transmitter series is uses to obtaining ultrasonic wave by vibrating high voltage ultrasonic transducer. Receiver series is used to receiving reflection wave from the object before it used as interruption logical at microcontroller counter. Mechanic activator required to activates ultrasonic transducer. In the other side, microcontroller series also used as transmitter and receiver series and mechanic activator controller, time of flight splitter and timer, and also to doing serial communication with the computer. Interface application and Time of Flight splitter used to doing Time of Flight data acquisition from microcontroller. Image spatial resolution defines by fitting edge spread (ESF) function data. Afterwards, defining line spread function (LSF) value which obtained by first differential from edge spread function (ESF). Spatial resolution defining process ends by fitting line spread function then full width at half maximum (FWHM) value could be obtained. FWHM is the spatial resolution value of obtained image from imaging system. The result shows image spatial resolution value which obtained from ultrasonic wave imaging system is 0,35cm with standard deviation 0,03cm. Keyword: point spread function, spatial resolution, Time of Flight, full width at half maximum (FWHM).

Rancang Bangun Audiometer Berbasis Mikrokontroler dengan Antarmuka Komputer

YOUNGSTER PHYSICS JOURNAL Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
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For this research, an audiometer based on microcontroller with computer interface as a measuring instrument for the threshold of audible range has been designed. This device has some features, like graphic display, audio intensity display, and computer frequency. This audiometer intended for the research consists of frequency generator, audio generator, and manual and automatic amplifying switch. The microcontroller is the main component which has the ability to be frequency generator using Fast PWM at timer 1 within 16bit resolution and crystal value 16MHz so that the frequencies at 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, and 8000 Hz can be generated precisely and steadily.The maximum audio intensity as the result of this research using the device was 46,2 dB. The result of the frequency test on the device designed for this research has the linear correlation coefficient R=1, meanwhile the audio intensity measured at the standardized device has the linear correlation coefficient R=0,997Keywords: microcontroller, sound level meter, multi-tester, frequency, audio intensity

PEMBUATAN MODEL UJI NILAI TEBAL PARUH (HVL) PESAWAT KONVENSIONAL SINAR-X MENGGUNAKAN PENGOLAHAN CITRA DIGITAL

YOUNGSTER PHYSICS JOURNAL Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
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 Designed of software application half value layer (HVL) which uses digital image processing has been use measurement HVL of X-ray conventional that is designed by using Borland Delphi 7.0 program. The system used as a simple tool for quality control (QC) of output X-ray.The firs step which is done to bring about software application is designing application image cropping, designing application open image, then designing applicationof pixel intensity value and designing application HVL. The step of software application usage is firstly expose phantom stepwedge by using X-ray conventional, secondly, process the expose result so it produces image radiographygray scale, thirdly,process digital imageby using scanner, save image digital with bitmap format, then process image by using software application.From measuring the result of four digital images gray scale obtained HVL average of value is 2.04 mmAl. Beside that, the measurement is also done four time using the standart tool Multipurpose detector (MPD,) obtained HVL average of value is 1,97 mmAL, from both datas it process deviation value 0,07 and relative research is 99,97 % for software application. So it can be conclude that digital image processing can be used to count HVL X-ray conventional. Key words   :Digital image radiography, image cropping, pixel intensity, half value layer (HVL).  

SISTEM TELEMETRI PEMANTAU GAS KARBON DIOKSIDA (CO2) MENGGUNAKAN JARINGAN WIFI

YOUNGSTER PHYSICS JOURNAL Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
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This research has developed telemetry system for CO2 gas monitoring using MG811 gas sensor with Wifi network system. Telemetry sistem is very important because CO2 is lethal gas for human. This system allows for monitoring, data acquisition and early warning from somewhere far away from the gas source. This data acquisition system using MG811 gas sensor, ATmega8535 microcontroller and I2C communication protocol for data transfer between sensor and microcontroller. Data from microcontroller is sent to Wiz6000 using serial communication protocol. Wiz6000 is a serial to wifi module. Data from wiz6000 then read by computer that connected to Wifi network belong to wiz6000 with IP and port that suited with the configuration.CO2 gas sensor is being realized with reading the sensor value via I2C communication protocol with MG811 and ATmega8535 miconcontroller. After calibration, the linier coefficeient R = 0,997 toward standar CO2 meter. Data acquisition CO2 concentration with MG811 is sent via telemetry system using Wifi network that can be accessed using computer program. The program then will show the data real-time and showed in a table, chart and save them to MySQL database. This telemetry monitoring sistem also a early warning system that give a warning when the CO2 concentration increased above the safety standard.Keyword: CO2, hazardous gases, sensor, data acquisition, telemetry

FAST FOURIER TRANSFORM (FFT) UNTUK ANALISIS SINYAL SUARA DOPPLER ULTRASONIK

YOUNGSTER PHYSICS JOURNAL Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
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The vibration is a physical phenomenon that frequently occur in a system. This study examines the Doppler effect that occurs in a system by observing signals generated sound system with ultrasonic inspection methods and analyzes these signals to function Fast Fourier Transform (FFT) Matlab. The system is made by utilizing the collision object being towed magnetic field. Collision time is controlled by the microcontroller ATmega16 is used as a reference signal. The experiments were performed 3 times with a delay variation interval or different. The research data in the form of a frequency output signal microcontroller port and the reflected sound wave Doppler ultrasound fetal Doppler devices recording the results using computer software scope version 1.31. The signal was tested by using a fast Fourier transform to look at the frequency domain signal using Matlab 2013 on computer programming. The test results show the system has a lot of FFT frequency. But can be observed the 3 dominant frequency system. The test results compared to the reference frequency FFT shows the amount equal to the sum frequency generated by the microcontroller mean Doppler frequency spectrum of the sound is 387.597 Hz.Keywords: Signal, Doppler Effect, FFT, Ultrasonic Inspection, Dominant Frequency

SISTEM TELEMETRI PEMANTAUAN SUHU LINGKUNGAN MENGGUNAKAN MIKROKONTROLER DAN JARINGAN WIFI

YOUNGSTER PHYSICS JOURNAL Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : YOUNGSTER PHYSICS JOURNAL

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Research has been done to make a systems of sensors and telemetry systems for data acquisition the ambient temperature based microcontroller and used Wi-Fi networks. This research also aims to make a computer software telemetry systems that can perform real-time data acquisition ambient temperature. Telemetry monitoring the ambient temperature is very important because it can take measurements remotely and in a place that is not affordable. Research has been carried out by designing, manufacturing, and testing telemetry systems which consists of two main parts: the transmitter and receiver. At the transmitter consist of components LM35, ATmega8535 microcontroller, and Wi-Fi radio. While at the receiver consists of a Wi-Fi receiver and computer. Based on the results of the characterization of the sensors and data acquisition, the dependent between the data obtained by the equation ADC and temperature standard thermometer y = 1.0027x + 0.2801. At the receiver, systems can work in reading data, display data in graphs and store data in the MySQL database systems. From the results of the ambient temperature telemetry systems calibration against standard measuring instrument obtained correlation value of R = 0.9988. So the correlation value obtained from this it can be concluded that the telemetry systems as a whole is functioning properly in the ambient temperature measurement data acquisition. Keywords: temperature, telemetry, microcontroller, temperature sensor LM35, WIZ110SR

Co-Authors AB Susanto Achmad Widodo Adi Priyo Wicaksono, Adi Priyo Agung Chandra Prasetya Agung Nugroho Setiawan, Agung Nugroho Agus Indarjo Agus Sulistiyo Agus Suyanto Agus Syafrudin Agus Triyanto Ahmad Syaify, Ahmad Aini Moeljono, Aini AL. Supartinah, AL. Andika Bagus Setiawan, Andika Bagus Andri Wahyu Septo Putra Anifatur Nurjannah, Anifatur Arbiyanti, Yossi Norma Arfian, Finty Ari Anshori, Ari Ari Suwondo Arief Suseno, Arief Arif Syaifuddin Arifin Budi Putro, Arifin Budi Arinianzah, Aldo Rizqi Aris Wijayanti Arista, Desi Arlien Siswanti Arnefia Mei Yusnida Asfan Muqtadir, Asfan Astuti, Anjar Ave Gierdo Alfaseno, Ave Gierdo Baliyan I, Baliyan Bambang Nugraha, Bambang Basuki Basuki Bayu Surarso Budi Setiawan Chrisna A Suryono Chrisna Adhi Suryono Cicilia Artitin Cynthia Damayanti Dadang Sukandar Dayyana, Surya Desi Sandra Sari Desie Dwi Wisudanti, Desie Dwi Dewi Agustina Dewi Sulistyaningrum Dhidik Prastiyanto Diana Layla Dimas Putra Anugrah, Dimas Putra Djoko Adi Widodo Donny Prasetyo Santoso, Donny Prasetyo Drajat Martianto Dwi Puji Adiana, Dwi Puji Edi Wibowo Edi Wibowo Kushartono Edy Junaidi Eka Miftakhul Jannah, Eka Miftakhul Eko Supraptono Emi Agustina, Emi Endah Setiyaningrum Endang Sri Susilo ENNY SUSWATI Ervia Yudiati Evi Setiawati Fatekurohman, Mohamat fatimah Fatimah Febriana Tirta Kirana, Febriana Tirta Fitri Mahardika Sari Frida Fallo Gatot Murti Wibowo, Gatot Murti Gatot Yulianto Gentur Handoyo Gigih Budhiawan Gunawan Widi Santosa Hadi Endrawati Harindra W Pradhana, Harindra W Harindra Wisnu Pradhana Haryati Haryati Hayat Maulana Heri Sugito Heri Sutanto Hernita Kusuma Wardani Hery Sulistyo JNS, Hery Sulistyo Hery Widijanto Hidayat, Syarief Thaufik Hilmi Trian Setyawan Indhana Sudiharto, Indhana Indri Trifiantari Irianiwati Irianiwati Irwani Irwani Isa Nurnusanto, Isa Isnaini Isnaini Ivan Nurizal Sakti Izah, Luluk Lailatul Jatmiko Endro Suseno Jauhari Syamsiyah Joko Winarno Juniyanto, Dimas Kamasita, Systriana Esi Kartini Sinaga Kesawa Sudarsih Khanif Pramusinto, Khanif Kharis, Muhamad Kusworo Adi Kusworowulan, Suryati Kwartarini Murdiastuti, Kwartarini Laela Meitasari, Laela Laska, Yulinda Lukman Hakim Mahda Veronika Maisi, Sri Malau, Rotua Mardiyono Mardiyono Margo Utomo Marsetyawan HNES, Marsetyawan Mediawati, Saskia Mefi Priba Sari, Mefi Priba Melo, Gabriella Imanuella Melyana Nurul Widyawati Menur Wahyu Pangestika, Menur Wahyu Mohamad Nadhif, Mohamad Muh. Yusuf Muhammad Arif Prasetyo Muhammad Arsyad Suyuti Muhammad Izzuddin Shofar Muhammad Zainuri Mujiyo Mujiyo Mulyanto Mulyanto Munarso Munarso Muthoifin Muthoifin, Muthoifin N. Euis Sutaningsih, N. Euis Nailatul Ilmi Nasronudin Nasronudin Niharul Annas Nirwani Soenardjo Nourobby Aulada, Nourobby Oky Dwi Nurhayati Oky Yuripa Pradana P. H, Aditya Praptiwi Praptiwi Prasetyo Nugroho Raden Ario Radini Sinta, Radini Ragil Saputra Rahayu Sapta S Rahmat Gernowo Rakhmat Syaefullah Ramadhan, Hazbina Fauqi Rani Gamawati, Rani Ratna Dwi Meilani, Ratna Dwi Retno Handayani Retno Hartati Ria Amitasari Ria Azizah Rieneke L Sela, Rieneke L Rini Riyanti Robby Eko Christanto Rudhi Pri, Rudhi Rudhi Pribadi Rusdi, Muh Sangkertadi Sangkertadi Satryo Adi Wibowo, Satryo Adi Setyaningsih, Erni Sharfina Sharfina, Sharfina Siti Fatimah Muis Soeharyo Hadisaputro Sri Budi Barunawati, Sri Budi Sri Huning Anwariningsih Sri Kusumastuti, Sri Sri Sedjati Sri Sukamta Sudadi Sudadi Sudibyo Sudibyo Sugeng Purbawanto Sugiyanto Sugiyanto Sukarnen Sukarnen, Sukarnen Sulistyo Warjono, Sulistyo Sumarno Sumarno Sumaryo Sumaryo Suntoro Suntoro Supriyanto Supriyanto Supriyati Supriyati Suroyo Suroyo Suwarto Suwarto Tatyantoro Andrasto Tika Retnowati Tri Saputra, Tri Valentino, Nico Vifaldi Agti, Vifaldi Vincensius Gunawan Wahyu Fredi Santoso Wahyu Setia Budi Widyatmani Sih Dewi Wilis Ari Setyati Yosafat Hermawan Trinugraha, Yosafat Hermawan Yudha Nurdian, Yudha Yuli Hermansyah, Yuli Yuningtyastuti, Gita Surya