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Subject: search.filters.subject.Arduino

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    GPS Positon Predicting System by Kalman Filter with Velocity from OBD and Direction from Magnetometer
    (2021-03-10)
    Chunhakam, Puripak
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    Pummarin, Phurit
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    Jeen-Im, Purichaya
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    Wardkien, Paramote
    ;
    Wisartpong, Pichet
    In this research, the GPS position system improving in a good and bad environment with Kalman filter is presented. Which proposed system consist of a GPS L26-DR module, GY-26 compass sensor for detected direction, and request velocity data from ECU with OBD-II and used as an input to Kalman filter to predict a more accurate position. The proposed system operates with two modes, the first mode is the mode that received normally position data, the received position data is fed to be an input of the Kalman system to improve that position data. If it loses the GPS position, the last position received from GPS will be used as an input to Kalman filter to predict the next position and after that, the previous predicted position data is feedback as an input to Kalman filter, and it repeats the process until the system can receive good GPS signals once again. The second one operates as the first mode in a normal situation, but the difference is, when it loses the GPS position, velocity data from a vehicle, direction from compass module and the last GPS position will be used to predict the next position. When it gets normally GPS position data, the GPS position is fed to an input of the Kalman filter. The results show that the first model has more errors than the second one but it's better than only conventional GPS positioning.
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    Pedot:Pss film preparation and characterization using convective deposition system controlled by arduino microcontroller for organic photovoltaic application
    (2021-01-01)
    Wongrerkdee, Sawitree
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    Ritruksa, Mantarat
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    Phattum, Saisunee
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    Lohawet, Khathawut
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    Kaewprajak, Anusit
    PEDOT:PSS films are prepared using convective deposition system. The convective deposition system is designed and controlled by a low-cost Arduino microcontroller. The microcontroller shows suitable potential for the system operation with good performance. Then, the system was applied to prepare PEDOT:PSS films and the prepared films are characterized. The prepared films reveal the increase in roughness and thickness for the high-velocity operation which could be occurred due to turbulent flows of PEDOT:PSS molecules. The result causes a decrease in transmittance, resistance, and water contact angle. For organic photovoltaic application, the enhanced power conversion efficiency is observed in corresponding to the increased short-circuit current density due to carrier transport efficiency improvement in organic photovoltaic devices provided by rough surfaces and thick films. The success of organic photovoltaic fabrication confirms the accepting ability of the convective deposition system controlled by Arduino microcontroller for non-vacuum thin film deposition. Thus, it should be considered as a usefulness system for thin-film based device fabrication with a low-cost operation.
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    Apparatus for inspection of low-coercivity magnetic force microscopy tips
    (2018-08-13)
    Damrongsak, Badin
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    Photaram, Worachote
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    Saengkaew, Karnt
    ;
    Cheowanish, Ittipon
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    Damrongsak, Pattareeya
    In hard disk drive manufacturing, magnetic force microscopy (MFM) is employed to provide feedback for process control. This requires accurate and precise measurement of the intensity and the width of the write field generated from fabricated recording heads. Thus, the response of MFM tips when exposed to the write field must be consistency, run to run and machine to machine; however, no specific tool that can inspect and separate out-of-spec or defective MFM tips is available so far. In this present work, we designed and developed a new apparatus that is suitable to quantitatively evaluate the performance of low-coercivity MFM tips. The detailed discussion of the design of the proposed system is given as well as the inspection algorithm. Basically, a solenoid coil is used as a magnetic field generator which can generate the field strength up to 500 Oe, enough to saturate the tip magnetization. When the tip was exposed, a phase difference of the oscillating MFM tip, which is directly proportional to the field intensity, is employed as a measure of the tip response. In addition, the capability of the implemented apparatus to inspect low-coercivity MFM tips was demonstrated. Results were then compared with those obtained from a conventional MFM machine with the reference magnetic write head as a test sample. Several tests with different sets of low-coercivity MFM tips were carried out to evaluate the implemented system. Results showed that it can distinguish the response of different MFM tips; however, as the results were not too different, only three samples were selected to present here, including the tips with typical magnetic response, low response and out-of-spec response. The measured phase shifts of those samples were 54.5 ± 0.3, 36.3 ± 0.3 and 15.4 ± 0.2 degrees, respectively.
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    The improved sensitivity of remote robot control via parallel method
    (2015-12-23)
    Samaimak, S.
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    Tipsuwanporn, V.
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    Numsomran, A.
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    Harnnarong, Sh
    In a robot control system, the process of data reading affects the consumed time which will directly affect to the time is used in this system. The more channels exist, the more time will be consumed in the robot control system. This work presents the application of parallel reading in the wireless receiver with eight channels for robot semi-automatic control. The software presented in this work was intentionally written as a standard library for Arduino which can read both in sequence and parallel. Obviously the result shows that the all of eight channels, the parallel reading in this work consumed the reading time less than the sequence reading, which decreased the time consumed in the reading process. It affects to improve the sensitivity of remote robot control.