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Energy Harvesting USB 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

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energy harvesting usb charger

Energy HarvestingUSB Charger

Thibault Maury

Minyoung Kim

repeated charging keeps our mobile devices grounded
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
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
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
the design
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
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
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
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
movie demonstrations
Movie Demonstrations
  • Collecting Small Currents
  • Charging USB

Solar Panels ~$50

Piezostrips ~Samples from Advanced Ceramics Inc

HomeDepot $25





DC-DC Converter ~Samples from Dallas Semiconductor

AA Rechargeable ~$5

Electronic Equipment ~$50

Unexpected Costs ~$25

Total ~$155