Battery used Battery charging
Browse by Theme

Off-the-grid

Pedal Powered Farms and Factories: The Forgotten Future of the Stationary Bicycle

The possibilities of pedal power largely exceed the use of the bicycle.

The Short History of Early Pedal Powered Machines

From the 1870s onwards, pedals and cranks were attached to tools like lathes, saws, grinders, shapers, tool sharpeners and to boring, drilling and cutting machines.

Small Windmills Put to the Test

Wind power rules, but commercially available small windmills are a swindle.

Urban windmills harm the environment

A small windmill on your roof or in the garden is an attractive idea. Unfortunately, commercially available micro wind turbines deliver hardly enough energy to power a light bulb. Their financial payback time is much longer than their life expectancy and in urban areas they will not even deliver as much energy as was needed to produce them.