DIY machine shop: Four essential tools you can build from recycled parts. Two or more people can generate electricity from a recycled auto alternator using the treadle-powered generator. Photo courtesy of Pat Delany
Proyecto DIY: Cómo hacer una cocina solar parabólica de cartón
rocket stove design that is better suited for indoor use. It does take some getting use to in the sense that if one doesn't stack the wood in properly it smokes back into the house. This also lends to thermal mass heating.