Trash To Treasure - Recycling An Overhead Projector 

For artists, you can use the body as a light box. You can probably adapt the mirror/lens head as a camera lucida. And you might be able to adapt the lens from the head to make a telescope.

Buddy I don't know why you don't have a couple million views on your channel with all the information, tips, tricks etc. that you share in these videos... Your how to's and stuff like that you do is SUPER informative!

Enjoyed the education you provided about the lens! Never knew about that before!👍

nice score on the projector andy, them fresnals will start a fire in a snowstorm,lol, love your trash to treasure projects, best wishes m8

19:49 a beautiful sight to behold ^_^ :D I have a lot ... like a lot of these lens with even more magnification reflectors. I've scraped many rear projection tvs and other things ..I haven't had a chance to scrape one of these yet... I have a few jumbo ones 48in and 65in ones... I currently have this size of lens in my bug out bag atm.(sandwiched between my shelter ) One thing i like is that they gather so much light that they can work even with thin clouds or smoke. TFS... was awesome to watch :D

Thank you! Have an old projector stasjed in my shop. Been debating on whether to keep it for pattern transfers or break it down to get the lens. (Didn't think about the potential for multiples.) Far more likely to use the lens than to use the projector for it's intended purpose. Plus, it's taking up valuable shelf space. Thumbs up!

I got one of those projectors for $20 at a thrift shop several months ago, took it apart, and had the curiosity to see if I could (using the Fresnel lens) during a full moon catch anything on fire from the reflected sun from the moon. Didn't work !! Good to know the focal length is about 10 inches though... as it's a little different than a regular magnifying glass in how it puts a bright dot on the burn location. I was also told by a TV repair guy (he sometimes repairs projection TV's that have much bigger Fresnel lenses) that the "s" in Fresnel is silent since it's named after a French guy who invented it. I have several other parabolic mirrors and magnifying lenses of various sizes that I was hoping to do a comparison study on to see which performs better... which packs up better for backpack / camping outings... will probably be posting several vids this month once I get my stuff together. If you haven't checked out this site yet, try greenpowerscience.com for a comparison of buyable larger Fresnel lenses... all kinds of specs, burn time down to tenths of a second, total temp reached, etc. :)

I just found onr yesterday, 😎👍

Great Movie projector as well!! If you watch something through it, the video looks true 3d veiwing it through the fresnel lens, you should try it, its trippy!

Never heard of a Fresnel lense.. now i have

If you can't feel the ridges on either side of the lens, that means it's actually TWO lenses held together face to face by the non-ridged edges. Cut off said edges to get both lenses. They are apparently even more efficient at focusing sunlight when seperate!

Is the round lens Flat on one side and curved on the other side please? a plano convex lens?

Cool I just got a Elmo Hp-4K Dx out of the trash .. think I’m about to take it apart

21:14 Triangle sky formation!

Does anyone have a glass that would fit a 3m 9200 ( any 9000 series should work)?

churches use them to put songs on the wall penacostels how hot does it get on lens were you put transparent tablet wont play with out stoping have you seen old one that takes filament bold like 3oo wats allways run fan after turning off bolb

i have one.........age 1990??

I got 6 of them free, I thought my wife could have use it for he school. turns out she cant. I wish you lived close by to me I would give you them .just to get them out of my way. I found using a lighter works real well to light a fire, especially at night.

Fresnel pronounced fren - el