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2.009 Final Presentation December 8, 2004 Yellow Team Overview - - PowerPoint PPT Presentation
2.009 Final Presentation December 8, 2004 Yellow Team Overview - - PowerPoint PPT Presentation
2.009 Final Presentation December 8, 2004 Yellow Team Overview Background The Kinkajuice Alpha Prototype Business Model Questions Background Context Mali: 14 million people 10,000+ villages 30% literacy rate Kinkajou: Microfilm
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Overview
Background The Kinkajuice Alpha Prototype Business Model Questions
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Background
Mali: 14 million people 10,000+ villages 30% literacy rate Context
Kinkajou: Microfilm projector for night-time adult literacy classes. One projector used per school.
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Background
$50 maximum cost 10:1 use to charge ratio Low maintenance Simple interface Portable Matches lifespan of Kinkajou 1 charge cycle lasts for two classes Kinkajou Charger Needs
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The KinkaJuice
Product Specifications ~$45 manufacture cost 10:1 use to charge ratio 100-hr life cycle for motor No user manual needed 10 kg “Plug-in” outlet specific to Kinkajou
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Alpha Prototype
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Alpha Prototype
Larger range of muscle groups = More power output Bicycling versus Rowing
Data from Bicycling Science, David Gordon Wilson, 1982.
Cycling vs. Rowing
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 1 2 3 4 5 Time (min) Power (hp)
Bicycling Rowing, seat fixed
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Alpha Prototype
Mechanics User Input Negator Motor Spool One-way Clutch DC Motor Motor Output
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Alpha Prototype
Mechanics User Input Negator Motor Spool One-way Clutch DC Motor Motor Output
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Alpha Prototype
Mechanics User Input Negator Motor Spool One-way Clutch DC Motor Motor Output
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Alpha Prototype
Electronics
Motor Output Boost Converter Battery Overcharge Circuit LED Control Circuit _” Mono Jack
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Alpha Prototype
Electronics
Motor Output Boost Converter Battery Overcharge Circuit LED Control Circuit _” Mono Jack
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Alpha Prototype
Electronics
Motor Output Boost Converter Battery Overcharge Circuit LED Control Circuit _” Mono Jack
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Alpha Prototype
Electronics
Motor Output Boost Converter Battery Overcharge Circuit LED Control Circuit _” Mono Jack
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Alpha Prototype
Electronics
Motor Output Boost Converter Battery Overcharge Circuit LED Control Circuit _” Mono Jack
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Alpha Prototype
Box Extrusion Plate Wheels Handle Frame & Materials
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Ergonomics
Rowing machines User feedback On-campus Mali Details of design
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Dimensions
Optimal distance between feet and seat: 9” Wheels: 3” diameter
Critical Heights
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Dimensions
Foot plate angle: 55° Foot wedge angle: 35° Foot wedge introduced after Mali research Increases user stability Critical Angles
55° 35°
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Business Model
The Competition
$130 1.7 to 1 72 10 Unisolar US-11 panel $150+bike+batt 20 to 1 6 125 Pedal-a-Watt $50 +batt 4 to 1 29 25 Freeplay hand crank $45 +/-$10 10 to 1 12 60 Kinkajuice Approx.Cost Use:Charge Charge time for 2 hour class [min] Rated Output [W] Product
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Business Model
Cost Analysis
*Funding solicited from NGO’s and non-profit organizations
Total Cost $49.00
Circuit $5.00 Frame $6.00 DC Motor $7.00 Negator Motor $10.00 Wheels $5.00 Other $6.50 Battery $9.50
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Deployment
Year Phase Units Produced Unit Cost 2005 Field Testing 45 $50 2006 Kinkajou Partnership 5,000 $45 2007 Expansion of Kinkajou 10,000 – 15,000 $40 2008 New Markets 15,000 – 25,000 $35
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Acknowledgements
Course Instructor - David Wallace Lab Instructors – Beth Marcus & Chris Magee Industry Mentor – David Britton, TI 2.009 Instuctors Pappalardo Staff Tim Prestero & Design That Matters The MIT Public Service Center ME Department Head Rohan Abeyaratne Thank You!
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Questions?
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555 Timer IR2121 Mosfet Driver 311
Comparator
+
- Resistance
Knob Boost Converter Current Limit
Batteries
2002T Charge Controller
LED
Thermistor 1/2” Phono Jack SPDT Switch
Control Circuit Charging Circuit Overcharge Circuit
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Power Output Across Battery Leads on Packed Dirt
Mean power output = 65.11 W
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Power Output Across Battery Leads on Packed Dirt
Mean power output = 47.24
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