With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
We have a be nice comment policy. Please be positive and constructive.
Thanks Soooo much!!!
You can get a suitable lens for this exact project from the front of a large projection television.
Oh, just a note on my earlier note. Lodge (
http://www.lodgemfg.com/aboutus ) the guys who make cast iron dutch ovens and such may be interested in a fresnel lens thing to heat up their big pots (so people will cook with them over the summers and camping). I tried to make one with several smaller fresnel lenses, but no go. Perhaps one that is larger than my page magnifiers and smaller than your blast furnace one . . . Anyway, if you had a good design they might be interested in it.
Hi. I was struck by the fabulosity of your foundry (I myself would have melted most of the household goods were I to have one to play with . . .). However, since I am looking to make cookies outside of my house in the summer, it is a bit much for my purpose. I am desirous of a solar oven that won't blow over (no big reflectors) be temperture controllable, and that one can safely leave for a few minutes. Having made the foundry, could you tell me if using several small Fresnel lenses might work for an oven? Say, each one focused on a Dutch oven with lid? I was hoping to get something less likely to blow over and that might be controlled easily with a Raspberry Pi (hopefully to be able to control the heat and not have to babysit it, having some simple gears to maneuver it as the son runs its course. If you wish to try this out I will buy the necessary Fresnel lenses and send them to you. Perhaps a simple dome of Fresnels over a clear hotbox, or an oven bag over a cast iron pot? I do know that Lodge Logic is interested in anything that might convince people to buy more of their pots, and those heavy iron pots would be good for lenses to heat up for cooking (as the iron will disperse the heat over the pot . . . ) Thanks for all your good work in any case!
Fresnel Lens 3002ºF DIY Lava Obsidian FARMINGby GREENPOWERSCIENCE
part 1 DIY SOLAR TRACKING STANDby GREENPOWERSCIENCE
Fresnel Lens pool heating optionby GREENPOWERSCIENCE
Giant Fresnel Lens Deathray: An Experiment in Opticsby DrSimons
DIY key making or key copyingby GREENPOWERSCIENCE
Solar cooking blackened seafood parabolic mirror Fresnel Lensby GREENPOWERSCIENCE
Solar Death Ray (TV Fresnel Lens)by bennelson
Salvaging the Fresnel Lens from a Rear Projection TVby Tool Using Animal
Fresnel Lens Strirling engine 18 volt generator SUN POWERby GREENPOWERSCIENCE
Portable Fresnel Solar Ovenby Renard_Bleu
Download our new apps for iOS, Android and Windows 8!
© 2014 Autodesk, Inc.
By clicking "Create Account" you are indicating that you have read and agree to the Terms of service.
Already a member? Login »
Enter the email associated with your account and we will send you your username and a temporary password.
Not a member? Sign Up »