Fresnel lens from old projection tv. Initial build. Turns and tilts. Focus to be dealt with next build session. Fresnel lenses of this sort can turn concrete in to slag. Should be able to weld aluminum and braze. Clean heat for thermal processes. Much potential. About 1kw. (read more)
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
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