1. 1 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Levitating LED Light ECE 4007 ∙ L03/04 December 9, 2010 Andy Givens Inga Shvartsman Tres Kimball Shruti Batra Chris Melton

2. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 Levitation Coil Power Transfer Antenna Illuminate 6 LEDs Project Overview

3. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 3 Teaching Tool Household Illumination Price : $120 Market Competition: Levitating Globe Motivation

4. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 4 Design Objectives Proposed Milestones and Tasks Completed? yesno Calculations Power Requirements Design Targets LED Illumination Ability to Power 6 LEDs Impedance Matching Signal Generation Levitation Two Inches from Coil Circuitry Design Vertical Oscillation Music Filtering Orb Momentum and Balancing

5. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 5 High Level Block Diagram

6. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 6 Wireless Power

7. 7 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Signal Generation

8. 8 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Signal Generation

9. 9 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Signal Generation

10. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 10 Antenna Response Link Coils Tune Circuit Increase Turns B-Field Resistance Receiver Weight

11. 11 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Wire Size: –Number of Turns –Weight – Resistance Coil Design Core Increases Levitation Distance Coil Wrapping = Time Consuming Smaller Wire -> More Turns -> Heat Generation

12. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit 1

13. 13 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

14. 14 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

15. 15 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

16. 16 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

17. 17 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

18. 18 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

19. 19 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

20. 20 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 Control Circuit

21. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 21 Putting It All Together Incompatible Levitation and Power Circuits Previously Destabilized Stable System Corrupted Sensor Outputs Solution: 10 Hz Low Pass Filters and Buffers

22. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 22 Audio Circuit Create Chebyshev Filter Filter iPod Output Signal Control Signal for Vertical Displacement Objectives Problems Presence of Large Noise Voltage Inability to Decipher Kick Drum Mixer Necessary Instability Due to Bouncing

23. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 Oscillator -Transistor Shorting -Solution Under Voltage Lockout Bouncing -Extracting Kick Drum from Audio Signal Orb -Weight -Balancing 23 Challenges

24. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 24 Hall Effect Sensors Temperature Sensitive Inconsistent Responses F=m*a Grounding Challenges

25. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 25 Control Circuit Designed Around HE Sensors Transistor Overheating Stability Challenges

26. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 26 Cost Analysis PartDetailsAmountMarket CostOur Cost NMOS TransistorIRFZ 44N3$5.04 Op-AmpTL0716$1.50 Potentiometer100 KΩ2$2.00 Potentiometer10 KΩ1$1.00 Potentiometer100 Ω1$1.00 Resistor5 KΩ, 1%4$1.40 ResistorAssorted, 5%17$0.85 Resistor100 Ω, 1 W2$2.98 Capacitor6.8 nF, 1 KV5$5.00 Capacitor0.22 uF2$0.40 Capacitor0.15 uF1$0.20 Hall Effect SensorsAD221512$11.02 Magna Wire500 ft1$9.65 Diode1N41482$0.40 Inductor100 uH, 14 A2$19.12 Cree LEDsC535A-WJN6$2.58 Oscillator “On” LEDC503B-BCN1$0.55 Steel Core 1$5.00 Total Cost to Build: $69.69$47.77

27. 27 ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 FCC Constraints Safeguards Power Optimization PCB Design Vertical Oscillation to Music Future Work

28. ECE 4007 L3 LEVITATING LED LIGHT10/20/2010 1 28 Questions?