1. Final Presentation Senior Design 2 April 20, 2010

2. Randall Vaughan Sine Wave Generation Layout and Design Apparatus Design PCB Testing Caroline Quijano Op-Amp Configuration Layout and Design Apparatus Design PCB Testing Zach Jordan Op-Amp Configuration Microcontroller Interfacing Footprints and Schematic Design Jonathan Lynch Sine Wave Generation Website Design Circuit Board Production Schematic Design Electrical EngineeringComputer Engineering Electrical Engineering

3.  Problem  Solution  Constraints TechnicalTechnical PracticalPractical  Final Product  Cost  Testing PCBPCB SensorsSensors

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.  Technical Constraints  Practical Constraints

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

11.  Isolated high voltages  Appropriate warning labels displayed [3]

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

15.  Top Layout

16.  Bottom Layout

17. Power Supplies Transmitting/ Receiving Signals COM Port Front

18. Back

19. Oriented Strand Board Transmitting/ Receiving Sensors

21. Part DescriptionQtyPricePart DescriptionQtyPrice Sinewave Generator1$4.33Voltage Regulators: PCB1$50.003.3V Regulator1$1.34 Apparatus1$75.005.0V Regulator1$1.10 PIC 241$4.6210.0V Regulator1$3.08 Operational Amplifiers: Male Straight Header1$1.00 PA69 Operational Amplifier1$40.00Copper Plates2$37.00 TLE21411$1.62MCP420101$4.12 OPA4451$1.23Power Supplies2$30.00 Capacitors34$13.60Enclosure1$13.00 Resistors38$7.60 Total $288.64

23. Individual Stage Testing StagesOutput Voltage (V)Output Frequency (kHz) ExpectedObserved% ErrorExpectedObserved% Error Power Supplies Positive PS-0548.0047.900.21xxx Negative PS-05-48.00-47.900.21xxx Voltage Regulators LM337-20.00-19.91-0.45xxx LM31737.0037.070.19xxx PTN7806017.0017.201.18xxx L494OD2T10.0010.101.00xxx LD11175.00 0.00xxx LD11173.30 0.03xxx Waveform Generator XR2206 (+/- 0.5V, +/- 5kHz)1.251.304.08250.00255.102.04 PreAmplifier TLE2141 (+/- 2V, +/- 5kHz))20.00 0.00250.00253.801.52 Power Amplifier PA69 (+/- 5V, +/- 5kHz)80.00 0.00250.00253.801.52

30.  [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.