START FINISH Don’t stop. 2.009 Fall 2004 Purple Team
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Functional Requirements
Consistent power supply while running independent of a batteryCompetitive quality and priceErgonomic interfaceNo Running InterferenceDurable
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User Interface
Modular design (MP3 Player / Power Tube)Sliding connectorErgonomic designHip Belt dockingUnending power while running
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Internal components
Clear tube casing
Neodymium magnet
30 AWG magnet wire coilMP4ever circuit
Detachable player casing
MP3 circuit (iRiver)
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How does it work!?
Reciprocating magnet
Reflector magnet
Coils
MP4everCircuit
iRiverCircuit
Voltage
Voltage
~
_
+ -
Battery
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Magnet / Coil details
Theoretical ModelPredict effects of
changing variables
Optimization TestsFinal Design
• Double Coil design• 1100 turns each• 6 in. tube length• 1 in. tube ID• 28 AWG wire
Size of tube
Number of turns per coil
Number of coils
Gauge of wire
Location of coil
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Voltage regulation
Input 2 Hz AC10 V Max. peak-to-
peak0.45 W Max.
Output 1.4 V0.15 W Min.Steady Waveform
AC from coil
Wave Rectifier
Capacitor Bank
Output Filter
Switching Regulator
Driver Chip
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Voltage regulation
AC from coil
Wave Rectifier
Capacitor Bank
Output Filter
Switching Regulator
Driver Chip
Full Bridge Rectifier
Coil output
Capacitor Bank
Average = 5.5-10V
Switching Voltage Regulator
Average = 1.4 V
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Voltage regulation
AC from coil
Wave Rectifier
Capacitor Bank
Output Filter
Switching Regulator
Driver Chip
50-80% Efficient
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MP3 Players, Worldwide
MP3 player sales
0102030405060708090
Mill
ions
of U
nits
MP3 Players, US
Source: Consumer Electronics Assn., Digital Networks N. America, Euromonitor Database, China Daily
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Develop product alone
RequirementsRaise capitalManufacture, market product
EvaluationNo initial brand recognitionCrippling initial start-up cost
ConclusionMight never regain initial capital
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License concept
RequirementsObtain patentFind partner, broker deal
EvaluationNo running / production costsCollect royalties ~ 5% of sales (wholesale)
ConclusionBest option for profitability
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Cost and competition
Competitor pricesFlash memory
iRiver 128MB $ 120 Sony-Philips 128MB $ 140 MPIO 128MB $ 114 Rio Sport 128MB $ 124
HD players Apple iPod 40GB $ 400 Apple iPod mini 4GB $ 250 CL NOMAD 30GB $ 228
Cost breakdownMP3 player circuit$ 5128MB Flash memory $ 20Circuit, coil $ 10Magnets $ 7 Battery $ 2Casing $ 1Cost to produce $ 45
Wholesale price $ 90MP4Ever Retail price $ 150
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Future directions
Improve efficiency and obtain better power output to:1) Reduce size and weight of MP4ever2) Improve charging capability
Consider expanding into portable radio marketLocate interested buyers