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A design of Non-smoking Area Control System  

Kim, Seong-Gon (명지대학교 전자공학과)
Kim, Seung-Yon (명지대학교 전자공학과)
Ahn, Yun-Seok (명지대학교 전자공학과)
Lee, Ki-Hong (명지대학교 전자공학과)
Jeong, In-Kyoung (명지대학교 전자공학과)
Soh, Dea-Wha (명지대학교 전자공학과)
Publication Information
Journal of the Speleological Society of Korea / v., no.77, 2007 , pp. 1-7 More about this Journal
Abstract
Nowaday, prohibition of smoking is getting more important issue. So we designed "non-smoking area control system". This system is organized with AVR(ATmega8535), smoke sensor, comparator(LM339) and etc. In non-smoking condition sensor's output voltage is about 5V, and in smoking condition sensor's output voltage is under 5V. So we used comparator(LM339) to devide two conditions. In both conditions AVR(ATmega8535) transmits datas to the computer of administrator. At this time method of communication is RS-232.
Keywords
AVR; smoke sensor; RS-232; LM339;
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