ECE 300 Brian Austin Paul Obame Michael Vaughn Thomas P. Wills

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ECE 300Brian AustinPaul ObameMichael
VaughnThomas P. Wills

• Dr. Green
• Final Project
• April 17, 2004

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Introduction

• Objectives
• 1. Familiarize with hands on use of equipment.
• 2. Use of concepts from lecture.
• 3. Obtain a better understanding of circuitry.

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Materials List
4
Board Layout
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Sensor

• AD22103 Temperature Sensor
• Specifications Features
• Ideal 3.3V operating voltage
• Temperature coefficient of 22mv/ C
• Output voltage proportional to the Temp x Vs
• Ranges from 0 to 100C at 0.25V 3.05V

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WHY?????

• AD22103 chosen because
• Output given as an analog voltage as opposed to
  serial voltage or analog current.
• The Package Type, TO-92, was easy to connect
  because of pin spacing. An alternative, SOIC, was
  not used because of the small structure which
  would require a separate board to mount it on.
• Voltage input and output are ideal for the MSP430
  because of similar operating voltage ranges.

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Preconditioning of Sensor

• Op Amp provides filter of noise
• Removes load off of the sensor for a more
  accurate output

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Sensor Layout
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Calibration
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Software
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Problems

• Incompatibility with Windows XP operating system
  and flash emulation device. The parallel port is
  not activated by windows until it needs to be
  used.
• The inaccuracy of the sensors output rises above
  the rated error of .1 at 3.3V because the
  operating voltage on the sensor is 2.86V.

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Conclusion

• What we learned
• Some C programming
• Soldering skills
• The Analog sensor
• The MSP430
• Ideas for future projects
• Multiple sensors
• Changing the refresh rate on the sensor read