It’s a well desecrated energy harvesting pot to study

1. Energy Harvesting
USB Charger
Thibault Maury
Minyoung Kim

2. Repeated Charging keeps our
mobile Devices Grounded
 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?

3. Energy Harvesting
 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
 Permits us to stay mobile!
 Become Independent of long stagnant charging periods

4. Collecting Wasted Energy
 Solar Panels
 Use suns energy while walking
 Placed on shoulders for
convenience
 Piezoelectric strips
 Pressure from footsteps into
electrical energy
 Create energy as you walk!
 Faraday Tube
 Spring-loaded Magnet
 Energy from body motions
 Sent out in USB output
 Universal Charging
Energy Storage
Solar Body Mass Movement

5. The Design
 Harvested Energy is
feed to circuit
 Electrical Energy is
manipulated to charge
a battery
 Harvested Energy
stored in Battery until
needed

6. Stage1 - Regulator
 Regulates power from
constant voltage
devices
 Solar Panels
 Uses Current
Regulation to keep
battery charging safe
 Implements 10% Rule
 Eliminates Cut-off circuit

7. Stage 2 – Micro Watt Collector
 Specializes in collecting
small amounts of
irregular energy
 Piezoelectric strips
 Faraday Induction Tube
 System of Capacitors
and Inductors
 Voltage builds up
 Current is passed
through
 Battery Friendly Output!
540mW (PFC) + 240mW (Induction)
= 780mW per day

8. Stage3 – USB Charger
 Rechargeable NiCad
Batteries to USB
 DC-DC Step Up
 1.3V to 5.0V
 Implements high
efficiency chip
 Power consumption is
always a concern

9. Entire Schematic

10. Movie Demonstrations
 Collecting Small
Currents
 Charging USB

11. Budget
Solar Panels ~$50
Piezostrips ~Samples from Advanced Ceramics Inc
HomeDepot $25
Magnets
Springs
Tube
Circuitry
DC-DC Converter ~Samples from Dallas Semiconductor
AA Rechargeable ~$5
Electronic Equipment ~$50
Unexpected Costs ~$25
Total ~$155

12. Time Line: Acom pl
i
shed C hapt
er
s
Pl
anned Added/M odified
Weeks 1 2 3 4 5 6 7 8 9 10 11 12
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

13. Questions?
Comments.