On Sun, 3 May 2009, Jeffrey Melloy wrote: > > I'd like to figure out a method of cooking with a fresnel lens small > enough to fit in a backpack.
That would be a solar oven? No lens needed, just an airtight foldable box with extended metallic reflectors. People have easily boiled water with versions made of cardboard and foil w/glass front. Fresnel lenses are more like a blowtorch: immense heat over 1cm spot size > > On Sun, May 3, 2009 at 9:07 PM, William Beaty <[email protected]> wrote: > > > > On Sun, 3 May 2009, Ryan Reggio wrote: > > > >> so, here's the idea, any idea, inkling, project, experiment, etc. > >> you can think of, put here. no idea is too crazy > > > > > > Why not build one which can actually create usable parts? Like > > the Makerbot CNC, or others? It's not just a demo like the candyfab, > > it's an actual micro-fab machine shop. Use the first one to spit out > > specialized parts to make more of them. See: > > > > http://www.youtube.com/watch?v=412cDGFZBvc > > > > > > > > Now if you want CRAZY ...then how about some basic science. But not the > > boring conventional kind. Instead, step away from conventional reality > > and temporarily put a stop to our limited mundane expectations. I'm > > talking about high voltage crackpot experiments. Real mad science, like > > old B&W science fiction movies. > > > > For example, I've always wanted to try harnessing the following HV > > phenomenon in order to try out some ideas. > > > > Threadlike streams of "electric wind" > > http://amasci.com/freenrg/airthred.html > > > > Ideas like storing data in a column of empty space, or perhaps create an > > audio delay line, or a burglar alarm (breaking the invisible ion beam.) > > Or perhaps even build an oscilloscope CRT which runs at one atmosphere, no > > vacuum. > > > > > > (((((((((((((((((( ( ( ( ( (O) ) ) ) ) ))))))))))))))))))) > > William J. Beaty SCIENCE HOBBYIST website > > billb at amasci com http://amasci.com > > EE/programmer/sci-exhibits amateur science, hobby projects, sci fair > > Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci > > > > > > > > > > (((((((((((((((((( ( ( ( ( (O) ) ) ) ) ))))))))))))))))))) William J. Beaty SCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci --~--~---------~--~----~------------~-------~--~----~ Website: http://saturdayhouse.org/ Post: [email protected] Unsubscribe: [email protected] -~----------~----~----~----~------~----~------~--~---
