• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.24 no.10
• /
• pp.1369-1375
• /
• 2020

Arduino is a microcontroller platform for non-IT major students, and is widely used as a learning tool. Several AVR series microcontrollers are used in Arduino boards, but ATmega128 is not used. ATmega128 is widely used because of its high expandability and competitive price compared to ATmega328 and ATmega2560 used in Arduino boards. Therefore, by allowing ATmega128 to be used in an Arduino environment, the usability of existing hardware and the Arduino platform can be improved. In this paper, proposed are an Arduino-compatible board design based on ATmega128 and ways to use the ATmega128-based board. As the strengthes of the Arduino platform can be used while utilizing existing hardware in the proposed extension, it is expected that the proposed one can be used in various microcontroller-related education and enhance the learning efficiency.

• Journal of the Korea Society of Computer and Information
• /
• v.25 no.1
• /
• pp.79-86
• /
• 2020

In this paper, we analyzed the case vulnerable to the power analysis attack of the ARIA algorithm and AES algorithm. Through this, we propose an algorithm with a safe structure for power analysis and prove through experiment. The proposed technique is a masking method using LFSR with a cyclic structure. To verify this, 1000, 2000, and 4000 power traces were collected, and the corresponding results are shown and proved. We used ATmega328 Chip for Arduino Uno for the experiment and mounted each algorithm. In order to measure the power consumption, a resistor was inserted and then proceeded. The analysis results show that the proposed structure has a safe structure for power analysis. In the future, we will study ways to lead to performance enhancement.

• Journal of Convergence Society for SMB
• /
• v.6 no.4
• /
• pp.25-30
• /
• 2016

This paper presents on the development of a compact anti-lost device requested recently. The proposed device consists of the master and slave modules based on Bluetooth4.1 technology. To implement a low-power characteristic, an algorithm has been also developed. The transmitting and receiving circuits are designed by using BoT CLE110 module supporting Bluetooth 4.1. The ATmega 328P-AU was used for the control and LP3874EMP was used as a linear regulator. Power consumption of the fabricated product in operating mode is only 10mAh and 35mAh for MCU operating state. Alarm operation distance is $10m{\pm}30%$, the effective radiated power is less than 10mW, the frequency band is designed to operate in the Bluetooth band with 26MHz bandwidth. And algorithms have been developed to extend the battery life. The size of the product was obtained as $45{\times}45{\times}15mm$ for master and $35{\times}35{\times}10mm$ fr slave. After the optimization process, it is expected to be commercialized as a wristwatch for anti-lost device.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.12 no.2
• /
• pp.345-352
• /
• 2017

In this paper, we design and implement an educational robot system that can use scratch education with the function of user demanding to perform robot education in actual school site in an embedded environment. It is developed to enable physical education for sensing information processing, software design and programming practice training that is the basis of robotic system. The development environment of the system is Arduino Uno based product using Atmega 328 core, debugging environment based on Arduino Sketch, firmware development language using C language, OS using Windows, Linux, Mac OS X. The system operation process receives the control command of the server using the Bluetooth communication, and drives various sensors of the educational robot. The curriculum includes Scratch program and Bluetooth communication, which enables real-time scratch training. It also provides smartphone apps and is designed to enable education like C and Python through expansion. Teachers at the school site used the developed products and presented performance processing results satisfying the missionary needs of the missionaries.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2013.01a
• /
• pp.27-28
• /
• 2013

본 논문은 DC모터와 Bluetooth모듈을 통해 직접 조종하여 움직이는 알람시계 형태로 로봇을 제작하여 단순한 알람시계가 아닌 재미와 편의를 제공하는 알람시계 로봇을 제안한다. Arduino Uno 보드(ATmega328 기반의 마이크로컨트롤러 보드)와 DC모터를 이용한 로봇 본체, 스마트폰과 통신하는 bluetooth모듈, 로봇을 작동하는 어플리케이션 등으로 구성된다. 알람이 작동되면서 랜덤하게 움직이는 로봇은 블루투스 통신으로 제어가 되고 사용자의 조종에 따라 움직인다. 로봇은 스마트폰과 블루투스 통신을 통해 받은 데이터로 조종되어 지정된 도착장소로 움직일 수 있다. 이러한 로봇을 제작하여 실생활에 상용화 가능하게 만들어 또 하나의 아이디어 알람시계가 되고자 하는 목표를 가진다.

• Journal of the Korea Society for Simulation
• /
• v.17 no.4
• /
• pp.199-208
• /
• 2008

Lately, since Complementary Metal Oxide Semiconductor(CMOS) image sensor system has low power, low cost and been miniaturized, hardware and applied software studies using these strengths are being carrying on actively. However, the products equipped with CMOS image sensor based polling method yet has several problems in degree of completeness of applied software and firmware, compared with hardware’s. CMOS image sensor system has an ineffective synchronous problem due to superfluous message exchange. Also when a sending of data is delayed continually, overhead of re-sending is large. So because of these, it has a problem in structural stability according to Polling Method. In this study, polling cycle was subdivided in high-speed synchronization method of firmware -based through MCU and synchronization method of Stepwise was proposed. Also, re-connection and data sending were advanced more efficiently by using interrupt way. In conclusion, the proposed method showed more than 20 times better performance in synchronization time and error connection. Also, a board was created by using C328R board of CMOS image sensor-based and ATmega128L which has low power, MCU and camera modules of proposed firmware were compared with provided software and analyzed in synchronization time and error connection.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.13 no.5
• /
• pp.436-442
• /
• 2020

ESS(energy storage system) has recently become an important power source in various areas due to increased renewable energy resources. The more ESS is used, the less the effective capacity of the ESS. Therefore, it is important to manage the remaining useful lifetime(RUL). RUL can be checked regularly by inspectors, but it is common to be monitored and estimated by an automated monitoring system. The accurate state estimation is important to ESS operator for economical and efficient operation. RUL estimation model usually requires complex mathematical calculations consisting of cycle aging and calendar aging that are caused by the operation frequency and over time, respectively. A lightweight RUL estimation model is required to be embedded in low-performance processors that are installed on ESS. In this paper, a lightweight ESS RUL estimation model is proposed to operate on low-performance micro-processors. The simulation results show less than 1% errors compared to the original RUL model case. In addition, a performance analysis is conducted based on ATmega 328. The results show 76.8 to 78.3 % of computational time reduction.

• Smart Structures and Systems
• /
• v.25 no.2
• /
• pp.229-240
• /
• 2020

In this research, toggled actuator forces were examined. For achieving to this object, an actuator was installed in a toggle pattern in a S.D.O.F frame and actuator forces were investigated thru a numerical analysis process. Within past twenty years, researchers tried to use strong bracing systems as well as huge dampers to stabilize tall buildings during intensive earthquakes. Eventually, utilizing of active control systems containing actuators to counter massive excitations in structures was emerged. However, the more powerful earthquake excitations, the more robust actuators were required to be installed in the system. Subsequently, the latter process made disadvantage to the active control system due to very high price of the robust actuators as well as their large demands for electricity. Therefore, through a numerical process (Part I), influence of toggled actuator pattern was investigated. The algorithm used in the system was LQR and ATmega328 was selected as a control platform. For comparison, active tendon control system was chosen. The final results show clearly that using the toggle pattern mitigates the required actuator forces enormously leading to deploy much lighter actuators.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2017.04a
• /
• pp.1131-1134
• /
• 2017

본 연구는 차동 용량형 섬유 압력 센서를 개발하고, 이를 깔창에 부착하여 보행 측정에 응용하는 것을 목적으로 한다. 차동 용량형 섬유 압력 센서는 3장의 전도성 섬유 사이에 2장의 절연체를 위치시키는 형태로, $5cm{\times}5cm{\times}0.23cm$ (가로 ${\times}$ 세로 ${\times}$ 두께) 크기로 제작하였다. 커패시턴스를 측정하기 위해 커패시턴스-디지털 변환칩(AD7152), ATMega328로 구성된 시스템을 제작하였고 PC로 데이터를 전송하여 모니터링을 수행하였다. 센서의 힘-커패시턴스 변화 특성 평가를 위해 센서에 가하는 중량을 65 kg 까지 5 kg 씩 증가시켜 가며 커패시턴스 변화를 측정하였다. 실험 결과, 무게에 따라 커패시턴스가 증가하는 것을 확인하였다. 보행 측정 가능성을 평가하기 위해 센서를 깔창에 부착한 후 보행 신호를 측정하였으며, 그 결과 보행에 따라 센서의 커패시턴스 값이 변화하는 것을 확인하였다. 이로부터 제작한 차동용량형 섬유 센서는 보행 측정에 활용할 수 있는 가능성을 확인하였다.

• Journal of Satellite, Information and Communications
• /
• v.12 no.1
• /
• pp.114-119
• /
• 2017

In this paper we present the search on HC-06 Bluetooth based driver module for emergency LED Multi-Directional Indicator. Nowadays, a growing trends in which electronic displays such as LED, LCD or plasma monitors are being installed in public places like bars, stores, entertainment areas, restaurants, lobbies, etc. In this paper, the study is curried out on efficiency of HC-06 Bluetooth module based controller driver that relates generally to the field of emergency signage management systems for displaying various indicator contents remotely on electronic displays in public and privates venues. It allows user smart devices interaction remotely with digital signage by providing content for displaying on at least one display in a venue. Depending on the emergency case, HC-06 Bluetooth based driver module proves the high efficiency as well as good performance of processing and communicating remotely the indicator based message that is displayed from a venue management control system by using smart devices. The system combines smart device that linked to HC-06 Bluetooth module with ATmega168/328 embedded micro controller which result by switching the displayer containing the digital signage indicator based message.