Video Collection

The pulser pump is about 20 years old (a river powered pump with no moving parts) and is simple appropriate technology

Brian White
BC
Canada

shows a generalized "mechanical mathematician" for making cob parabolic dishes or for making cob moulds for parabolic reflectors. Hopefully this will be accurate enough to make large moulds for big specalized parabolic dish reflectors.

The 2 bucket dripper tracker is an appropriate tech device for moving solar cookers, solar panels or perhaps even parabolic solar reflectors to follow the sun and maximize the energy trapped by the solar device.

The tracking solar accumulator is an experimental system to make and use a semi automatic tracking solar parabolic reflector to accumulate heat for various uses.
Every part of the experimental unit was made in my backyard from junk and fairly cheap readily available items.
The unit works moderately well and proves the concept.
Simple diy tracking was added soon after the video was taken

An innovative device (made from plastic), that can produce clean drinking water without chemicals or electric power.