What if I told you there is a light on the market powered by a bag of rocks (or sand or anything of mass that fits)? As the bag descends it activates a generator through a gearbox which provides direct electrical power for a single LED. Not only that, up to 4 lights can be connected to the main unit and are powered by that same bag of dirt. GravityLight sustainable lighting power is determined by the weight of bag filler. And aside from a noble mission to provide lighting to those that don’t have safe or economic access to it, GravityLight is a clever off-grid, non-solar, emergency light for people in the first world as well. Read More
Green energy
DIY Solar Air Heaters – What will they think of next?
So there’s this new technology out, perhaps you’ve heard of it. People are using this technology to cook with, grow their own plants, create electricity, heat their water and heat their homes. Apparently, I’ve been living under a rock because it’s been around for some time. The sun can, amazingly, do all these things and more and I never knew. Well for those of you who are as troglodytic as I am, here is a pretty simple and cost effective and best of all cheap solar air heater that actually works (and its less controversial than Solyndra!) Read More