Transcript Energy Harvesting/USB Charging

Energy Harvesting
USB Charger
Thibault Maury
Minyoung Kim
Repeated Charging keeps our
mobile Devices Grounded
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Entertainment and
Communications at our
finger tips is the standard
Always present wherever
we go
As we depend on mobile
devices we become grounded
when they need to be
recharged
How can we stay mobile if our
communications do not?
Energy Harvesting
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Conversion of ambient energy into usable electrical energy
Become your own personal power generation station!
Environmentally friendly Energy Source
Allows us to collect surrounding Energy naturally expended
through the course of the day to power our mobile electronic
devices
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Permits us to stay mobile!
Become Independent of long stagnant charging periods
Collecting Wasted Energy
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Solar Panels
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Piezoelectric strips
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Pressure from footsteps into
electrical energy
Create energy as you walk!
Faraday Tube
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Use suns energy while walking
Placed on shoulders for
convenience
Spring-loaded Magnet
Energy from body motions
Sent out in USB output
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Universal Charging
Energy Storage
Solar
Body Mass
Movement
The Design
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Harvested Energy is
feed to circuit
Electrical Energy is
manipulated to charge
a battery
Harvested Energy
stored in Battery until
needed
Stage1 - Regulator
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Regulates power from
constant voltage
devices
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Solar Panels
Uses Current
Regulation to keep
battery charging safe
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Implements 10% Rule
Eliminates Cut-off circuit
Stage 2 – Micro Watt Collector
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Specializes in collecting
small amounts of
irregular energy
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System of Capacitors
and Inductors
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Piezoelectric strips
Faraday Induction Tube
Voltage builds up
Current is passed
through
Battery Friendly Output!
540mW (PFC) + 240mW (Induction)
= 780mW per day
Stage3 – USB Charger
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Rechargeable NiCad
Batteries to USB
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DC-DC Step Up
1.3V to 5.0V
Implements high
efficiency chip
Power consumption is
always a concern
Entire Schematic
Movie Demonstrations
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Collecting Small
Currents
Charging USB
Budget
Solar Panels
Piezostrips
HomeDepot
Magnets
Springs
Tube
Circuitry
DC-DC Converter
AA Rechargeable
Electronic Equipment
Unexpected Costs
Total
~$50
~Samples from Advanced Ceramics Inc
$25
~Samples from Dallas Semiconductor
~$5
~$50
~$25
~$155
Time Line:
Weeks
1.0 Research on Energy harvesting
1.1 Solar Cells
1.2 Inductance energy conversion
1.3 Piezoelectricity
1.5 Power Regulator
2.0 Develop the Designs
2.1 Solar Panels
2.2 Inductance Power
2.4 Piezoelectric
2.5 Voltage Regulator
3.0 Build Systems and Combine
3.1 Solar Panel
3.2 Inductor Generator
3.3 PCB Development
3.4 Piezoelectric
3.5 Build Regulator
3.6 Package The Circuit
4.0 Troubleshooting/Testing
4.1 Charing the AA Battery
4.2 Supplying the USB
4.3 Documentaion
1
A com pl
i
shed
Pl
anned
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4
C hapt
ers
Added/M odified
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Questions?
Comments.