Final Presentation Senior Design 2 April 20, 2010.

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Presentation transcript:

Final Presentation Senior Design 2 April 20, 2010

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

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

 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

The Actual RF Apparatus [1]

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

 Technical Constraints  Practical Constraints

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

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

Power Supply Amplifier Microcontroller Waveform Generator Display Transmitting/ Receiving Sensors

 Top Layout

 Bottom Layout

Power Supplies Transmitting/ Receiving Signals COM Port Front

Back

Oriented Strand Board Transmitting/ Receiving Sensors

Part DescriptionQtyPricePart DescriptionQtyPrice Sinewave Generator1$4.33Voltage Regulators: PCB1$ V Regulator1$1.34 Apparatus1$ V Regulator1$1.10 PIC 241$ V 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

Individual Stage Testing StagesOutput Voltage (V)Output Frequency (kHz) ExpectedObserved% ErrorExpectedObserved% Error Power Supplies Positive PS xxx Negative PS xxx Voltage Regulators LM xxx LM xxx PTN xxx L494OD2T xxx LD xxx LD xxx Waveform Generator XR2206 (+/- 0.5V, +/- 5kHz) PreAmplifier TLE2141 (+/- 2V, +/- 5kHz)) Power Amplifier PA69 (+/- 5V, +/- 5kHz)

 [1] Radio Frequency Evaluation of Oriented Strand Board, by Xiaojian Liu, Starkville MS. [Online]Available: %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 us/clipart/results.aspx?qu=warning&sc=20.  [3] Google Images  [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, [Online] Available:  [5] Wood Products Notes: Methods of Moisture Content Measurement in the Lumber and Furniture Industries, by Phil Mitchell, Raleigh, NC. [Online]Available:  [6] United States of America. Federal Communications Commission. Code of Federal Regulations, Title 47, Part 15. Washington, D.C.: Federal Communications Commission,  [7] Panel Layup Operations, by Phil Mitchell, Raleigh, NC. [Online] Available: