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Thermoelectric Temperature Controller Computer Interface
Steven Rosas
Multifunctional Electronic Materials and Devices Research Lab
Department of Electric and Computer Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA
Contact Email: str.rosas@gmail.com
ABSTRACT
• This research project aims to engineer a way to interface between a
thermoelectric temperature controller and a personal computer. This
device considered here is an exis;ng manufactured product, however it
is limited to working independently for hea;ng or cooling
thermoelectric modules. The new interface system will add digital
interface to the temperature controller and allow data to be extracted,
decoded, and send to a computer.
INTRODUCTION
• The objec;ve is to interface a thermoelectric temperature controller by
displaying the temperature shown on the front 7-segment display to the
computer monitor.
• The device to be upgraded is an MTTC-1410 Thermoelectric
Temperature Controller manufactured by Melcor of Laird Technologies.
This instrument used to accurately control the temperature of a
connected thermoelectric device.
• This device is not designed to connect with a computer. The purpose of
this project is to find a way to expand the capabili;es of an exis;ng
system using engineering knowledge.
REFERENCES CITED
• i2c.info, “I2C Info – I2C Bus, Interface and Protocol,” i2c.info. 2015[Online].
• Available: hTp://www.i2c.info. [Accessed: June 2015].
• Melcor of Laird Technologies Technical Staff, Thermoelectric Handbook,
• Melcor a unit of Laird Technologies , 2009.
• Microcontrollers,” PIC 16F877A datasheet, 2001-2003.
• MicroChip, “PIC16F/LF1825/1829 14/20-Pin Flash Microcontrollers with nanoWaT XLP
Technology,” PIC 16F1829 datasheet, 2010.
• MicroChip, “PIC16F87XA 28/40/44-Pin Enhanced Flash Na;onal Instruments Corpera;on,
“Measure Temperature using a RTD, myDAQ, and LabVIEW,” Na;onal Instruments Corpera;on.
Jul 23, 2010[Online].
• Available: hTp://www.ni.com/example/31412/en/. [Accessed: June 2015].
• Omega Engineering, “OMEGA® Thin Film
• DIN Class “A” RTD Elements,” F3141 datasheet, 2015
• Paul. Morton. EE 3463. Class Lecture, Topic: “N-S12 & PIC Peripherals: I2C .” Department of
Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX,
May 2015.
• Paul. Morton. EE 3463. Class Lecture, Topic: “Q-S12 & PIC Peripherals: PWM .” Department of
Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX,
May 2015.
• Philips Semiconductors, “SAA1064 4-digit LED-driver with I2C-Bus
• interface,” SAA1064 datasheet, February 1991.
PROCESS
• Started with MTTC-1410 Thermoelectric Temperature Controller from
Melcor of Laird Technologies
• Disassembled the controller’s front interface.
• Iden;fied loca;on for modifica;on between the Phillips SAA1064T and
the Microchip PIC 16F877A.
• Soldered 3 wires for I2C output. The Green is SDA data line, orange is
clock line, and black is ground.
• A digital data analyzer was connected to each of the 3 wires to visualize
output to find address needed for the program.
• Programmed code for PIC 16F1829 to transla;ng I2C data to ASCII for
computer interface.
• Connected wires to assigned pins on the PIC 16F1829.
RESULTS
CONCLUSION
• The MTTC 1410 Thermometric Temperature Controller is now
connected to the outside world.
• Temperature data can now be displayed and recorded on a computer.
• One important lesson this project experience shows are the
fundamentals of electronic communica;on between devices.
Acknowledgement: Financial support of Department of Navy joint program
with the University of Texas at Aus;n and the University of Texas at San
Antonio under Grant No. N00014-14-0690 (UTA14-000795), technical
guidance of Dr. Paul Morton and program support of Dr. Ruyan Guo and Dr.
Amar Bhalla, are acknowledged.
Works with
Windows. Download
Proli?ic USB to Serial
Comm Port Version
3.3.2.105 Driver and
TeraTerm
application.
Also with Mac OSX.
Download Proli?ic
USB to Serial Comm
Port MAC Driver and
SerialTools
application.
DISCUSSION
• The task of finding an output, then transla;ng the I2C transmiong data
to ASCII to display on a computer was successful. Aper going over this
hurdle, the possibili;es for the MTTC 1410 Thermometric Temperature
Controller have greatly expanded.
• Sopware on a computer like a LabView plaqorm can use this data and
display in graphic interfaces.