Pavol Necpal
More ideas from Pavol
What is a gravity battery [The Future of Batteries: http://futuristicnews.com/tag/battery/]

Gravity Battery: An illustrated concept detailing the long-term, low-maintenance storage of energy through the use of the force gravity.

A Nice set of detailed instructions for making a wood gas stove and attached potstand. I like that it incorperates a mesh floor.

Wood gas stoves are lightweight, highly efficient stove heaters that require very minimal fuel such as twigs or pellets, and can be constructed out of tin cans.