23 December 2008MSD I – Week 2

Friday Work Summary

Established System Block Diagram Generated Initial Concepts Refined Specifications Benchmarked Crank/Spring Radio

Power Source

Power Conversion

Power Storage Light Dispersion

Human Foot HandGravity Sand WaterSolar

Linear Rotate GeneratePV CellRotate GenerateCentral Power NodePneumatic pump Generate

BatterySuper-CapacitorNone

Adjustable reflectorNon-adjustable reflectorMultiple LensesFacing UpFacing Down

# Metric Units Importance (Stars) Potential Value

1 Production Cost U.S. $ ***** 50

2 Usable Temperature Range °F or °C *** (30-120)°F or (0-50)°C

3 Water-Proof IPX Standard *** 3

4 Heat/Sand-Proof (Air Tight) Binary *** Yes

5 Storage Capacity mAh **** 6000

6 Recharge-ability Cycles ***** 500

7 Lifetime hrs ***** 100,000

8 Light Intensity Lumen *** 150-250

9 Light Distribution Lux ***** >150/4m2

10 Functional Drop Height m *** 3

11 Drop Cycles Cycles *** 50+

12 Lens Hardness (Resists Scratching) Mohs Hardness *** 6+

13 Efficiency (Light Source) Lumens/Watt ***** 100

14 Efficiency hrs/charge ***** 60

15 Charge Time hrs *** ≤4

16 Recyclable Parts % by weight ** 50

17 Environmentally Friendly Meets ROHS *** Yes

18 Aesthetically Pleasing Subjective * Yes

29 Weight (Mass) lb (kg) * <10lb (<4.5kg)

Additional Benchmarking Additional Concepts

Solar Super-Capacitors Dynamos

Finalize Lighting Requirements Assumptions may be necessary

Customer Contact Final Needs…

Information of Super-Capacitors Talk to Dr. Borkholder