1. RFID AC SWITCH Mid-Term Presentation September 30, 2008

2. Team Members Ricardo Calderon Electrical Engineering Team Leader Research and Documentation RFID Reader PIC Programming Website Design Jonathan Stanley Electrical Engineering Research and Documentation Power Supply TRIAC Control Website Design Jerome Walker Computer Engineering Research and Documentation PIC Programming Website Design Corey Tate Electrical Engineering Research and Documentation Power Supply TRIAC Control

3. Overview Introduction Problem Solution Technical/Practical Constraints Test Plan Schematics/Packaging Future Work Questions

4. Introduction What is RFID? How can RFID technology be used? –Inventory Control –Personal Access

5. Problem There are no OEM RFID AC Switches available. Many people are unfamiliar with the capability RFID Technology.

6. Solution OEM RFID AC Switch This will give manufacturers a quicker time to market.

7. Implementations How can the RFID AC Switch be used? –Light Control –Security Access –Outlet Control

8. Technical Constraints NameDescription Switching VoltageMust operate at 120 VAC. Output CurrentMust have a maximum current of 15 amperes. Read DistanceMust have a read distance of at least 2”. Authorized Tag Identification Must read 125kHz tags. Tag QuantityMust store at least 200 identification tags.

9. Technical Constraints Results From SD1 Switching Voltage Pass Output Current Pass Read Distance Fail Authorized Tag Identification Pass Tag Quantity Pass

10. Technical Constraint Read Distance SD1 Max Read Distance 1.50” Solution: - Upgrade from ID-12 to ID-20 Reader

11. Technical Constraints Results from SD2 Switching Voltage Pass Output Current Pass Read Distance Questionable Authorized Tag Identification Pass Tag Quantity Pass

12. Practical Constraints TypeNameDescription ManufacturabilitySizeMust have dimensions of at most 4” in length, 4” in width, and 2” in depth. Health and SafetySafetyMust meet UL (Underwriters Laboratories) guidelines.

13. Practical Constraints - Manufacturability Dimensions must be a maximum of 4”x4”x2” Solutions –AC/DC Converter –TRIAC –PCB Layout

14. Practical Constraints - Safety Must meet UL Guidelines Solutions –Non-conducive Enclosure –Isolated External Connections –Overcurrent Protection

15. SD2 Addition 2 Methods to Implement Dimmer Function –Dimmer Mode using Potentiometer –Dimmer Mode using PWM

16. Dimmer VDC Oscilloscope Green - Zero Crossing Yellow – Output 100%, 75% 50%, 25%, 0%

17. Dimmer VAC Oscilloscope Green - Zero Crossing Yellow – Output 100%, 75% 50%, 25%, 0%

18. Test Plan Erase Mode Write Mode Read Mode

19. Erase Mode Erase Modes –Erase all stored tags –Erase 1 tag at a time –Output debug messages on Hyperterminal

20. Write Mode –Store tag ID in memory –Same tag ID can only be stored once –Output debug messages on Hyperterminal

21. Read Mode Read Modes –Toggle –Timer 5s/10s Timer –Dimmer DU, DD, DU&DD, DS

22. Schematics RFID PIC RS-232

23. Schematics AC/DC Converter TRIAC Circuitry

24. Packaging 4” 2” ComponentQuantity 3-Wire Connector 2 Mode Switch3 Debug Port1 LED5

25. Future Work Order PCB Modify Project Case Solder Components on PCB Test Completed PCB

26. Questions Questions??