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The "Liberator" Compressed Earth Block Press (Pictured) is a machine that makes compressed earth blocks (CEBs). It takes earth/dirt/soil and squeezes it really hard to make solid blocks which can be used for building. Compressed earth blocks have many advantages as a building material: by making the building materials from the ground on the site, they eliminate the need to cart them in from elsewhere. This cuts down the costs and environmental impact of transport.
The CEB Press is controlled by an Arduino microcontroller in an electronics box.
Compressed earth blocks are very strong and insulate well against both heat and sound. This makes for a very energy-efficient building. Best of all, there is no charge for using dirt; it is literally a dirt-cheap way of building! (more...)