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Monday, January 07, 2013

GravityLight: the low-cost lamp powered by sand and gravity

Source: The Guardian

The problem of bringing light to remote parts of the developing world has been tackled in the past with everything from solar-powered lamps to wind-up devices and rechargeable batteries – all of which require relatively expensive kit or physical effort by the user.

But two London-based designers have now developed a light source that operates on the stuff that surrounds you – earth, rocks or sand – with the helping hand of gravity.

Developed by Martin Riddiford and Jim Reeves over the last four years, the GravityLight is simply charged by a bag that is filled with around 9kg of material and hung from a cord below the light. As the bag descends, a series of gears inside the device translates this weight into energy, providing 30 minutes of light. The light strength can be adjusted, from strong task lighting to a longer-lasting low-level glow, and two terminals on the front allow it to be used as a generator so it can recharge other devices including radios and batteries.

For the complete article, click here...
  • Managing Partners

    William Davidson Institute
  • Sponsoring Partner

    Citi Foundation
  • Content Partners

    Ashoka
  • Content Partners

    IADB
  • Content Partners

    MercyCorps

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