Fresnel lens solar cooker using TV lens

Solar cooking using my fresnel lens solar cooker made using a 2'x4' fresnel lens from a rear projection TV. I show it cook minced pork, burn a leaf within seconds and how to find the focal length. For more, see:
http://rimstar.org/renewnrg/fresnel_lens_solar_cooker.htm

My cone solar cooker:
http://rimstar.org/renewnrg/cone_funnel_solar_cooker.htm

and sun finder:
http://rimstar.org/renewnrg/sun_finder.htm

also make appearances.

- http://rimstar.org

Category:

Science & Technology

Tags:

• fresnel
• lens
• solar
• cooker
• cooking
• focal
• length
• cook
• cone
• sun
• finder
• howto
• diy
• rear
• projection
• tv

[crusty21]

Chances are, the only thing that was wrong with that TV was a burned out bulb or ballast which would cost about $65 on ebay. They usually only last about a year and half which is why people throw the TV's out.

[RimstarOrg]

@crusty21 Yeah, happens too often. People have forgotten that one option is to repair. When I was a kid we even had an appliance repairman living down the street and we repaired what we could. BTW Other parts were already missing by the time I got to it and when everyone was done taking parts, not much was left.

[Uriel1816]

Wow. What a great idea.

[RimstarOrg]

@Uriel1816 And to think that someone threw it away!

[appa609]

I can smell what you're making.

[RimstarOrg]

@appa609 It tasted as good as it smells! Yum.

[RimstarOrg]

@gamling1111 Hmm... My guess is yes, it would. After all I've cooked stuff in a frying pan over a fire in winter growing up in Labrador. Sounds like fun! If I forget to do it, and make a video, remind me this January or February.

[gamling1111]

@rimstarOrg Would you be able to use one of these in the winter if it were sunny or would the cold weather and snow cancel it out?

[RimstarOrg]

@Snapshotok2000 Thanks! That's a nice collection you have. I'm planning on going back and getting the small magnifiers too. So far I'm thinking of them for a siimple telescope and extra focusing of the fresnel lens focal point to an even sharper point to run a small can stirling engine. I'm sure I'll come up with other uses too.

[Snapshotok2000]

Nice video !

It is sad that so many of those lens are ending up destroyed . So far I found 6 fresnel lens and mirrors. I also have a few of the smaller magnifiers used for the each of the small tv units inside the projection tv units.

So far I am the only on in this area interested in using these lenes to cook with.

They are fun to use and can save some money. And theses lens are great to have as part of an emergency plan.

Thanks for the video and good luck !