• The Transactions of the Korean Institute of Electrical Engineers P
• /
• 제55권4호
• /
• pp.161-166
• /
• 2006

In this paper, an automatic lighting control system is developed using microprocessor. The developed system consists of a digital lighting control unit, an analog lighting control unit, and a lighting control simulator. In the developed system, ATMega128 is used as the main controller. The developed digital lighting control unit consists of eight modules and the developed analog lighting control unit consists of six modules respectively. Additional, the developed simulator consists of a digital and an analog lighting control simulation using graphic user interface. And so this developed system can be applied to the controller design of the interior and exterior lighting equipment.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• 제13권12호
• /
• pp.6001-6005
• /
• 2012

Although people want to learn guitar easily and happily, it is difficult to learn because many restriction comes from expense, student's efficiency and teacher/s skill. In this paper, the guitar teaching program has been developed for who is difficult to learn guitar fingering. The guitar teaching system with ATmega 128 was programed using visual studio MFC program. The guitar fingering U/I program was investigated for beginners easy to learn the code and playing with guitar.

• Journal of Power System Engineering
• /
• 제14권1호
• /
• pp.65-70
• /
• 2010

Magnetic levitation system is nonlinear and inherently unstable, so it is difficult to control. Analog control circuit was widly used as the controller of magnetic levitation system, but digital controller is now substituted for analog controller according to development of digital electronics. In this study, Atmel AVR series, ATmega 128 which is a kind of $\mu$-processor for digital controller is used because the chip is cheap and popular. We designed and made ATmega 128 one-board controller and aimed to verify validity through the experiance of levitation response.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 한국해양정보통신학회 2011년도 추계학술대회
• /
• pp.440-443
• /
• 2011

This paper aims to compose a new LED lighting control board in the LED lighting environment This LED lighting control board is designed to adjust the brightness of LED lighting depending on the change of surrounding brightness, and it is also designed to control the brightness by using ATmega128, which is an 8bit micro-controller, The PWM wave form likely to output into the LED driver is determined by the ADC value input through ADC.

• Convergence Security Journal
• /
• 제20권3호
• /
• pp.3-11
• /
• 2020

The social networking service (SNS) is free, but the data usage fee paid to the telecommunications company and the member's information must be provided directly or indirectly. In addition, while SNS' specifications for transmitting and receiving devices such as smart-phones and PCs are increasing day by day, using universal transmission protocols in special environments such as contaminated areas or semiconductor manufacturing plants where work instructions are mainly made using short messages is not easy. It is not free and has a problem of weak security. This paper verified the practicality through the operation test by implementing IMCP, a low-power, low-cost message transmission protocol that aims to be wearable in special environments such as risk, pollution, and clean zone based on ATmega128.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• 제25권2호
• /
• pp.241-251
• /
• 2015

In public-key cryptographic system based on finite field arithmetic, it is very important to challenge for implementing high speed operation. In this paper, we focused on 8-bit ATmega128 processor and concentrated on enhancing efficiency of reduction operation which uses irreducible polynomial $f(x)=x^{271}+x^{207}+x^{175}+x^{111}+1$ and $f(x)=x^{193}+x^{145}+x^{129}+x^{113}+1$. We propose optimized reduction algorithms which are designed to reduce repeated memory accesses by calculating final reduced values of Fast reduction. There are 53%, 55% improvement when proposed algorithm is implemented using assembly language, compare to previous Fast reduction algorithm.

• Proceedings of the KIEE Conference
• /
• 대한전기학회 2011년도 제42회 하계학술대회
• /
• pp.59-60
• /
• 2011

본 논문에서는 기존의 PCR 장비가 가지고 있는 낮은 경제성, 장비의 대형화, 긴 분석 시간 등과 같은 단점을 해결하기 위하여 ATMEGA128 마이크로 칩을 사용 continuous-flow PCR 칩의 온도를 제어 하였다. Polydimethylsiloxane (PDMS)와 산화 인듐-주석(Indium tin-oxide, ITO) 유리 기판을 사용하여 continuous-flow PCR 칩을 제작하였고 PDMS를 주조 하여 마이크로 채널을 형성하였다. 또한 유리 기판위에 ITO 전극을 패터닝하여 마이크로 히터를 제작하였다. 이 결과 continuous-flow PCR 칩에서 빠르고 정확한 온도 제어를 통한 DNA 중합 효소 연쇄반응 결과를 얻을 수 있었다.

• The Journal of the Korea institute of electronic communication sciences
• /
• 제5권5호
• /
• pp.504-508
• /
• 2010

A reducing labor is a big issue in rural community due to a increasingly aging society. In this paper, the water control system for corps production with a function of automatically controls and solar energy system is developed. The water level was measured by ultrasonic sensor and water gate was controlled by using servo motor. The system had included ATmega 128 control unit for signal controls. The water level control system will be able to contribute to the aging rural society.

• Proceedings of the KIEE Conference
• /
• 대한전기학회 2009년도 춘계학술대회 논문집 에너지변화시스템부문
• /
• pp.281-283
• /
• 2009

This paper presents the smart fan which is operated by a small conventional motor and an ultrasonic sensor. The smart fan generates cool wind with regulated speed of wing by the distance between the user and the fan. In this research, an 8-bit microcontroller (ATmega128) and an ultrasonic sensor (NT-TS601) are utilized for the system control and sensing information. In order to obtain the speed information from the encoderless DC motor, a stroboscope is used, which provides the voltage variation by the motor speed. The proposed smart fan makes the user feel cool, convenient and safe at a low cost.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• 제7권2호
• /
• pp.157-162
• /
• 2006

In this paper, power supply for ozone generating system is explained. Output voltage and frequency are controlled by phase displacement control of single phase inverter using ATmega128. The values of desired output voltage and frequency set using keypad and displayed using LCD. Actually, power supply is designed and manufactured. Through the experiments, the performance of output voltage and frequency control is verified.