Portable MP3 player as low-cost data logger

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dc.contributor.authorDe Lucena, Samuel E. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T06:25:22Z
dc.date.available2022-04-29T06:25:22Z
dc.date.issued2009-12-01
dc.description.abstractNon-audio signals have been recorded in the flash ROM memory of a portable MP3 player, in WAV format file, to examine the possibility of using these cheap and small instruments as general-purpose portable data loggers. A 1200-Hz FM carrier modulated by the non-audio signal has replaced the microphone signal, while using the REC operating mode of the MP3 player, which triggers the voice recording function. The signal recovery was carried out by a PLL-based FM demodulator whose input is the FM signal captured in the coil leads of the MP3 player's earphone. Sinusoidal and electrocardiogram signals have been used in the system evaluation. Although the quality of low frequency signals needs improvement, overall the results indicate the viability of the proposal. Suggestions are made for improvements and extensions of the work.en
dc.description.affiliationUNESP - São Paulo State University Department of Electrical Engineering Microprocessors and Instrumentation Laboratory, Guaratinguetá
dc.description.affiliationUnespUNESP - São Paulo State University Department of Electrical Engineering Microprocessors and Instrumentation Laboratory, Guaratinguetá
dc.format.extent1425-1428
dc.identifier.citation19th IMEKO World Congress 2009, v. 3, p. 1425-1428.
dc.identifier.scopus2-s2.0-84871531719
dc.identifier.urihttp://hdl.handle.net/11449/227069
dc.language.isoeng
dc.relation.ispartof19th IMEKO World Congress 2009
dc.sourceScopus
dc.subjectData logger
dc.subjectECG
dc.subjectMP3 player
dc.titlePortable MP3 player as low-cost data loggeren
dc.typeTrabalho apresentado em evento

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