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ThermoelectricTemperatureControllerComputerInterfaceStevenRosas

MultifunctionalElectronicMaterialsandDevicesResearchLabDepartmentofElectricandComputerEngineering,UniversityofTexasatSanAntonio,SanAntonio,TX78249,USA

ContactEmail:str.rosas@gmail.com

ABSTRACT•  Thisresearchprojectaimstoengineerawaytointerfacebetweena

thermoelectrictemperaturecontrollerandapersonalcomputer.Thisdeviceconsideredhereisanexis;ngmanufacturedproduct,howeveritislimitedtoworkingindependentlyforhea;ngorcoolingthermoelectricmodules.Thenewinterfacesystemwilladddigitalinterfacetothetemperaturecontrollerandallowdatatobeextracted,decoded,andsendtoacomputer.

INTRODUCTION•  Theobjec;veistointerfaceathermoelectrictemperaturecontrollerby

displayingthetemperatureshownonthefront7-segmentdisplaytothecomputermonitor.

•  ThedevicetobeupgradedisanMTTC-1410ThermoelectricTemperatureControllermanufacturedbyMelcorofLairdTechnologies.Thisinstrumentusedtoaccuratelycontrolthetemperatureofaconnectedthermoelectricdevice.

•  Thisdeviceisnotdesignedtoconnectwithacomputer.Thepurposeofthisprojectistofindawaytoexpandthecapabili;esofanexis;ngsystemusingengineeringknowledge.

REFERENCESCITED•  i2c.info,“I2CInfo–I2CBus,InterfaceandProtocol,”i2c.info.2015[Online].

•  Available:hTp://www.i2c.info.[Accessed:June2015].

•  MelcorofLairdTechnologiesTechnicalStaff,ThermoelectricHandbook,

•  MelcoraunitofLairdTechnologies,2009.

•  Microcontrollers,”PIC16F877Adatasheet,2001-2003.

•  MicroChip,“PIC16F/LF1825/182914/20-PinFlashMicrocontrollerswithnanoWaTXLPTechnology,”PIC16F1829datasheet,2010.

•  MicroChip,“PIC16F87XA28/40/44-PinEnhancedFlashNa;onalInstrumentsCorpera;on,“MeasureTemperatureusingaRTD,myDAQ,andLabVIEW,”Na;onalInstrumentsCorpera;on.Jul23,2010[Online].

•  Available:hTp://www.ni.com/example/31412/en/.[Accessed:June2015].

•  OmegaEngineering,“OMEGA®ThinFilm

•  DINClass“A”RTDElements,”F3141datasheet,2015

•  Paul.Morton.EE3463.ClassLecture,Topic:“N-S12&PICPeripherals:I2C.”DepartmentofElectricalandComputerEngineering,TheUniversityofTexasatSanAntonio,SanAntonio,TX,May2015.

•  Paul.Morton.EE3463.ClassLecture,Topic:“Q-S12&PICPeripherals:PWM.”DepartmentofElectricalandComputerEngineering,TheUniversityofTexasatSanAntonio,SanAntonio,TX,May2015.

•  PhilipsSemiconductors,“SAA10644-digitLED-driverwithI2C-Bus

•  interface,”SAA1064datasheet,February1991.

PROCESS•  StartedwithMTTC-1410ThermoelectricTemperatureControllerfromMelcorofLairdTechnologies•  Disassembledthecontroller’sfrontinterface.•  Iden;fiedloca;onformodifica;onbetweenthePhillipsSAA1064TandtheMicrochipPIC16F877A.•  Soldered3wiresforI2Coutput.TheGreenisSDAdataline,orangeisclockline,andblackisground.•  Adigitaldataanalyzerwasconnectedtoeachofthe3wirestovisualizeoutputtofindaddressneededfortheprogram.•  ProgrammedcodeforPIC16F1829totransla;ngI2CdatatoASCIIforcomputerinterface.•  ConnectedwirestoassignedpinsonthePIC16F1829.

RESULTS

CONCLUSION

•  TheMTTC1410ThermometricTemperatureControllerisnowconnectedtotheoutsideworld.

•  Temperaturedatacannowbedisplayedandrecordedonacomputer.

•  Oneimportantlessonthisprojectexperienceshowsarethefundamentalsofelectroniccommunica;onbetweendevices.

Acknowledgement:FinancialsupportofDepartmentofNavyjointprogramwiththeUniversityofTexasatAus;nandtheUniversityofTexasatSanAntoniounderGrantNo.N00014-14-0690(UTA14-000795),technicalguidanceofDr.PaulMortonandprogramsupportofDr.RuyanGuoandDr.AmarBhalla,areacknowledged.

WorkswithWindows.DownloadProli?icUSBtoSerialCommPortVersion3.3.2.105DriverandTeraTermapplication.

AlsowithMacOSX.DownloadProli?icUSBtoSerialCommPortMACDriverandSerialToolsapplication.

DISCUSSION

•  Thetaskoffindinganoutput,thentransla;ngtheI2CtransmiongdatatoASCIItodisplayonacomputerwassuccessful.Apergoingoverthishurdle,thepossibili;esfortheMTTC1410ThermometricTemperatureControllerhavegreatlyexpanded.

•  SopwareonacomputerlikeaLabViewplaqormcanusethisdataanddisplayingraphicinterfaces.