A $5 Light For The Developing World With An Ingenious Fuel: Gravity

The GravityLight gets power from the slow lowering of a weight. All it takes is enough elbow grease to hoist the bag, and you can light a room with nothing but a bag of sand.


Many of the solutions out there are ingeniously solar powered. But GravityLight, an idea from two British designers, is something completely different. It gets its energy from gravity: A 22-pound bag of sand that gradually cranks a gear-train attached to a D.C. motor. One lift is enough for 30 minutes of light, and recharging is as simple as pushing the weight up again.

Read more: http://www.fastcoexist.com/1681067/a-5-light-for-the-developing-world-with-an-ingenious-fuel-gravity#1

Also read: http://www.indiegogo.com/projects/282006


About fromourisland

Gardener, knitter, wife, mother of 2, grandmother, and lots more.
This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s