1. Mid-Semester Presentation Senior Design 1 October 8, 2009

2. Randall Vaughan Sine Wave Generation Layout and Design Electrical Engineering Caroline Quijano Op-Amp Configuration Layout and Design Electrical Engineering Zach Jordan Op-Amp Configuration Phase Shift Detection Computer Engineering Jonathan Lynch Sine Wave Generation Website Design Circuit Board Production Electrical Engineering

3.  Problem  Solution  Constraints TechnicalTechnical PracticalPractical  Alternatives  Progress

4.  Dr. Jack Liu of the Department of Forestry Products requires the use of a portable RF moisture content sensor  Needs a smaller, inexpensive, repackage of his patented prototype

5. The Actual RF Apparatus [1]

6.   Repackage his working prototype by using integrated circuits to replace test-bench equipment.

7. Power Supply Amplifier Microcontroller Waveform Generator Display Transmitting/ Receiving Sensors

8.  Technical Constraints  Practical Constraints

11.  Sensor must withstand debris, electrical noise, and moisture  Sealed, electrically shielded, rugged housing [2]

12.  Isolated high voltages  Partition that separates gap from user interface  Appropriate warning labels displayed [3]

13. Wall Plug Voltage Range Low Current Output Switching Power Supply Charge Pump -- DC/DC Converter --

14. Temperature Stability No Distortion Discrete Oscillator - Integrated Circuit Analog Filter Circuit --

15. Affordability Development Time Operational Amplifier Discrete Amplifier -

16. Phase Range High Voltage Input ResolutionTimers Logic Gates -

17. AugustSeptemberOctoberNovemberResearch HardwareDesign Prototyping Testing

18.  Configured XR2206 Waveform Generator to output 250 kHz sine wave  Ordered Power Supplies and connectors  Produced PCB for testing of PA78 350V Operational Amplifier

20. Programmable Oscillator

21. XR2206 Waveform Generator

22. Mean Well PS-05

23. OPA445 90V

24. PA78 350V

25.  [1] Radio Frequency Evaluation of Oriented Strand Board, by Xiaojian Liu, Starkville MS. [Online]Available: http://chevelle.its.msstate.edu:6777/attach/XiaojianLiuDissertation%20- %20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.p df?sid=&mbox=INBOX&charset=escaped_unicode&uid=2012&number=7&filename=XiaojianLi uDissertation%20- %20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.p df.  [2] Microsoft Office Online, Clip Art. 2009. http://office.microsoft.com/en- us/clipart/results.aspx?qu=warning&sc=20.  [3] Google Images. 2009. http://albas.id.au/images/temp/Caution%20electrical%20shock%20hazard%20inside%20sign.bmp.  [4] Forestry Facts: Guide for Using the Oven-Dry Method for Determining the Moisture Content of Wood, by R.S Boone and E.M. Wengert, Madison, Wisconsin, 1998. [Online] Available: http://forest.wisc.edu/extension/Publications/89.pdf. http://forest.wisc.edu/extension/Publications/89.pdf.  [5] Wood Products Notes: Methods of Moisture Content Measurement in the Lumber and Furniture Industries, by Phil Mitchell, Raleigh, NC. [Online]Available: http://www.ces.ncsu.edu/nreos/wood/wpn/methods_moisture.htm.  [6] United States of America. Federal Communications Commission. Code of Federal Regulations, Title 47, Part 15. Washington, D.C.: Federal Communications Commission, 2008.  [7] Panel Layup Operations, by Phil Mitchell, Raleigh, NC. [Online] Available: http://www.ces.ncsu.edu/nreos/wood/RMOG/Adobe/Panel.pdf.