Doomsday Preppers: Solar Beast
Dan builds a solar heating device from a common household item.
Also look up 'Green Power Science' and you will find a nice variety of them. They really are excellent.
Fresnel lenses heat up to 2000 deg. F. They don't come from TV's they are stamped out with grooves in way that amplifies the light.
Our family loves your youtube channel (green power science), we even made your parabolic solar cooker a few years ago.
@Larry Malcom Way I understand it it has to be the old tvs not the flat screen. they need to have the contour screen.
@Stevens Fmly :-) Thank you.