Energy HarvestingUSB Charger

Thibault Maury

Minyoung Kim

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?

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

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

The Design Harvested Energy is

feed to circuit Electrical Energy is

manipulated to charge a battery

Harvested Energy stored in Battery until needed

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

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

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

Entire Schematic

Movie Demonstrations

Collecting Small Currents

Charging USB

Budget

Solar Panels ~$50Piezostrips ~Samples from Advanced Ceramics IncHomeDepot $25

MagnetsSpringsTube

CircuitryDC-DC Converter ~Samples from Dallas SemiconductorAA Rechargeable ~$5

Electronic Equipment ~$50Unexpected Costs ~$25Total ~$155

Time Line: Acomplished Chapters

PlannedA d d e d / M o d i f i e d

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

Questions?

Comments.