• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.7
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• pp.1520-1525
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• 2009

In this paper, we study and simulate the suggested position control system using GPS and USN to replace the existing control system of a crane. For the correct approach, the position control system of a crane is divided into the control system of the ground station and the mobile station The hardware is comprised of GPS receiving module to receive the position control data of a crane from GPS satellites, bluetooth communication module for the data communication between the ground station and the mobile station, supersonic sensor module for a precise position control of a crane, motor to replace a crane roller, embedded MCU(ATmega128L) and so on. In here, an embedded MCU controls GPS receiving module, bluetooth communication module and supersonic sensor module. The Software is comprised of three programs. Three programs are the program to filter GGA output part in a receiving data of GPS receiving module, the driving program for supersonic sensor module, the digital map program to monitor a crane location. From the simulation results, it is demonstrated that the proposed system has the capability of crane position control with 1cm precision.

• Proceedings of the KIEE Conference
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• 2005.10b
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• pp.373-375
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• 2005

The purpose of this paper is to develop the Plastic Cortex Stimulator(PCS) for stroke patients using ZigBee technology. The PCS consists of an implantable neuro-stimulator and a user controller, The neuro-stimulator has the stimulus circuit which is the H-bridge circuit to generate a bipolar pulse. The bipolar pulse is known to be effective for stroke recovery. The user controller sends several wave-shape parameters (amplitude, pulse width, cycle, etc.) to the neuro-stimulator for variable stimulation using ZigBee technology. The CC2420 and atmega128L was used to implement ZigBee protocol stack. The wireless control of PCS based on ZigBee can help the tele-rehabilitation of the stroke patients. The most effective pulse shape parameters are being investigated through animal experiments. The bio-compatibility and user-friendly interface are supposed to be handled in further study.

• Proceedings of the KIEE Conference
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• 2005.10b
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• pp.508-510
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• 2005

In this paper, we have studied for the current control method with high accuracy for the high power LED driver that is necessary to the lighting system using LEDs. The control performance of LED driver can be improved with the adjustment of current control boundary by introducing D/A converters for setting high-offset and low-offset. And microprocessor (ATmega128) and D/A converter with 8 bits resolution are used in the proposed driver so that LED's illumination can be remotely controlled by serial communication on the spot or by key input. In the results of performance tests, we confirmed that the proposed control method is superior to the conventional control method using op-amps.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2284-2287
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• 2004

In this paper, an automatic welding DB system using a panel PC is developed. In the developed system, a automatic welding system is remotely controlled to overcome the restriction of operating condition by a portable panel PC, and the DB system such as the operating condition and control data of automatic welding carriage is developed by ATMega128.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.19 no.5
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• pp.53-59
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• 2020

This paper describes the design of a remote control device that can control the ON/OFF state of multiple air compressors using wireless communication. The main remote controller and air compressor remote controller were designed using a microprocessor (ATmega128), and the circuit diagram was configured to wirelessly communicate using A Zigbee module between the two remote controllers. The result of the measurement of wireless communication distance between the two remote controllers was more than 1.1 km.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.63 no.2
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• pp.69-73
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• 2014

In this paper, remote control and surveillance monitoring system of HID street-lamp using low-cost type of Zigbee communication module was developed. A plurality of capacitors with different capacity are attached to magnetic ballast for HID lamps. Changes in the amount of illumination can be adjusted by the changes in capacity so that the electric energy can be reduced. In Zigbee communication module, a ATmega128L microprocessor is used and in main CPU, ARM9 Core is used to construct a low-cost smart system. In surveillance monitoring systems, the system was configured to remote monitoring of presence of error in the lamp abnormalities, the status of leakage current and abnormalities of ballasts and capacitors and the validity of the proposed empirical experiment was confirmed.

• Journal of Sensor Science and Technology
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• v.22 no.6
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• pp.439-443
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• 2013

A wireless optical fiber interferometer arterial pulse wave sensor system is developed for remote sensing. The wireless optical fiber sensor system consists of Zigbee communication modules and an optical fiber interferometer arterial pulse wave sensor. The optical fiber arterial pulse wave sensor is an in-line Michelson interferometer enclosed with steel reinforcement in a heat-shrinkable tube. The Zigbee communication modules are composed of an ATmega128L microprocessor and a CC2420 Zigbee chip. The arterial pulse waves detected by the optical fiber sensor were transmitted and received via the Zigbee communication modules. The experimental results show that the wireless optical fiber sensor system can be used for monitoring the arterial pulse waves remotely.

• Annual Conference of KIPS
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• 2009.11a
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• pp.51-52
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• 2009

본 논문에서는 차량 내의 네트워크 가운데에서 대용량의 멀티미디어 데이터를 전송할 수 있는 MOST(Media Oriented Systems Transport) 네트워크 기반의 오디오 인포테인먼트 인터페이스 개발에 관한 연구를 수행하였다. 구현한 오디오 인포테인먼트 인터페이스는 MOST 네트워크 인터페이스 컨트롤러로 OS81050A INIC 칩을 사용하였으며, EHC 부분은 ATmega128L 8bit 마이크로컨트롤러를 사용하였다. 오디오 동작과 관련된 기능 블록(FBlock) 및 애플리케이션 작성에는 NetServices API를 활용하였다. 구현된 인터페이스는 MOST 네트워크 분석 도구인 OptoLyzer G2를 이용하여 정확한 동작여부를 확인하였다.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.267-268
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• 2011

In order to increase the efficiency of the PV solar can get maximum power output from a control is up. But MPPT request Converter since Solar module always work MPP about out condition. This paper study of 170W stand-alone PV MPPT system for charge and discharge control system of the battery. The proposed system is a way of Flyback converters, and controls the algorithm used P&O control method and ATmega128.

• ETRI Journal
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• v.36 no.3
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• pp.469-478
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• 2014

RSA signature algorithms using the Chinese remainder theorem (CRT-RSA) are approximately four-times faster than straightforward implementations of an RSA cryptosystem. However, the CRT-RSA is known to be vulnerable to fault attacks; even one execution of the algorithm is sufficient to reveal the secret keys. Over the past few years, several countermeasures against CRT-RSA fault attacks have tended to involve additional exponentiations or inversions, and in most cases, they are also vulnerable to new variants of fault attacks. In this paper, we review how Shamir's countermeasure can be broken by fault attacks and improve the countermeasure to prevent future fault attacks, with the added benefit of low additional costs. In our experiment, we use the side-channel analysis resistance framework system, a fault injection testing and verification system, which enables us to inject a fault into the right position, even to within $1{\mu}s$. We also explain how to find the exact timing of the target operation using an Atmega128 software board.