Posted: Jun 22, 2016 11:48 pm
theguardian.com wrote:The weight of light: how gravity is illuminating sub-Saharan Africa
Off-grid communities such as those in sub-Saharan Africa can pay thousands of times as much as the rest of us for their energy. Designer Jim Reeves has developed a simple, low-cost gear-train and generator that uses a descending weight to power a perpetual light source. Children can do their homework and study, families and friends can eat together and interact after dark adding new dimensions and possibilities to their lives.
short video