Burning stuff with a giant fresnel lens + how a DLP projector works
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- Join the science discord! / discord Hey everybody! Ive wanted to make one of these forever. Well, i have made one before but it was not a 'good' fresnel lens. If you want to learn more about fresnel lenses this is a good website - rimstar.org/eq... They have a youtube channel too with lots of educational content. / rimstarorg
And of course shoutout to The King of Random where i first saw this idea ! • Burning Stuff With 200... - วิทยาศาสตร์และเทคโนโลยี
![Cooking Dinner with Science [There was an attempt]](http://i.ytimg.com/vi/xZYf3R-4j3g/mqdefault.jpg)
Good idea with the glass over your lens. I've had trouble with them fogging up from UV exposure, or the ridges in the lens getting gunked up with dust and moss. The glass should protect from both
would a clear epoxy coat work?
Dead Meme clear epoxy is still not 100% clear, so it would scatter some light and thereby reducing its effectiveness. I recommend using acrylic which is 99% clear (compared to soda-lime glass at about 70% clear), but make sure you seal it so it doesn’t oxidize over time and get cloudy (specialty plastic clear coat spray exists for such a purpose) This is also why “glasses” are actually made or CR-39 plastic or polycarbonate for lenses now since it’s lighter and is a lot more clear for vision
Wud it work with all kinds of the layers from a tv
Man, I'll be 39 in 2 months.
Growing up, a big projection screen tv was so luxury. Everybody wanted to watch it and play games on it.
Now I watch a guy taking it apart and passing on knowledge. Great stuff going on here
No kidding that was a big luxury item in the day! Crazy how things change.
Clear sunglasses? You mean glasses?
those are uv-protection glasses, :)
They looked like safety glasses to me.
LOL good spotting
Very counterintuitive
XD that's funny they probably have UV protection
Should have said "The power of the sun, in the palm of my hand". You even had the goggles for the reference.
Dude I was literally just thinking that and then I see your comment
What is that from? I’ve heard it before...
@@Snerbington I think Dr. Eggman said it in the Sonic movie, but I feel like that's not right-
@@Snerbington Doctor octopus from Spiderman 2
Ocktavius... is that you ?
I did this once with a fifty inch. Set pocket change on a concrete stepping stone to melt. Thought it would take a bit so went in the house and made a sandwich, had lunch. When I came back, not only was my change fused but due to the movement of the sun, there was a line of glass where it had melted the concrete. Good times!
What if you made an alt called: ‘TheFrontyardScientist’...
Or a bartending channel called vineyard scientist
😂
Perhaps TheInsideScientist?
uhh ohh
uhhhohhh
You burned a hole in a solar panel. With the sun. Surely there is some poetic irony in there SOMEWHERE.
And i'm looking forward to a video on Shopping Cart sailing >:3
I'm just kidding.
you think
Its not "poetic irony."
Just plain irony. :P
😂
Izices the irony is strong. Kinda like how the lithium mining for Tesla batteries makes more pollution than driving a gas car
@@THESLlCK I hear this argument a lot and have my doubts especially as many Teslas have been on the road 200k+ miles and only have 10-20% range degradation.
Its also to my understanding Tesla either has a recycling program or is engineering one. Not only would they get the good PR it lowers cost of producing new cells by reclaiming raw materials.
I haven't looked into what percentage they can re-use but we'll see! Anything humans do has unforseen consequences so everyone should have a healthy dose of skepticism but I believe you're either being disingenuous or are rebelling against all the Elon shills (who can also be a problem when they can't take an ounce of criticism)
"Why do you need that old tv?"
Backyard scientist: "no reason"
“It’s not like I’m going to use the screen as a lense to blow stuff up with the sun or anything.
Just asking what happens when you focus the light from that glass onto another magnifying glass then repeat the process
LIGHT-CEPTION
U maybe like physical education...
I had to explain to my friend why I wanted this one out of the garbage. I got it today. The total nerdy trash pick
@@jeanh2288 did you end up doing anything with it?
youtube: watch a guy "burning stuff with a giant fresnel lens"
me: i wonder what will happen if you focus into a solar panel
backyardscientist: first i want to overclock a solar panel"
i freaking love you dude.
i really wonder, can you overclock solar panels for real? can someone explain this?
@@NikosPer It is simple: Let's take a 1 square meter solar panel and a 4 square meter focusing lens.
Normally, without the focusing lens the solar panel would catch a 1 square meter area worth of solar energy, it is said to be about 1000W.
The focusing lens will capture 4 square meters of energy (minus the losses, they took roughly 40% losses in the video, so we will do the same), so 4000W, 60% of that is 2400W. So the focusing lens will project about 2400W onto the 1 square meter of solar panel.
Giving you roughly 2.4 times more energy than normal. These are not exact numbers, just a rough guess to show you the point.
You don't want to focus too much energy onto the solar panel as it will melt the material, as shown in the video.
Also, in practical application, you would need to install several small mirror in a dish shaped area, moreover they would need to be moved all the time with the sun, so it is not possible to use this to super power your solar panels.
The backyard scientist: *melts penny*
FBI: you are under arrest for destruction of u.s. currency
@GERARDO HERNANDEZ im older than you and know that... just saying but some pennies are worth $$$$
@GERARDO HERNANDEZ Pennies made after 1982 are copper plated zinc. Pennies made 1982 or before are solid copper. During WWII pennies were made from steel.
@GERARDO HERNANDEZ I understand that I was just pointing out the fact that zinc pennies melt at a much lower temperature the the solid copper pennies.
@GERARDO HERNANDEZ I'm pretty sure it's still illegal, you are still destroying currency
@GERARDO HERNANDEZ I already have! I would also look up how to spell, it would do you good!
If I don’t have heavy mes-
If I don’t have heavy med-
*Looks concerned*
What :()
Hahaha best part, so funny
Heavy medi pool
I guess his favourite genre is not Heavy Metal... :/
I laughed so hard! 😂
Awesome stuff! 😎
RIP 👑 Your work has been inspiring to many of us, and I have watched you for years. It’s been a great journey. I would like to thank you for all you’ve done.
R.I.P
RIP
R.I.P. Legend
R.I.P
The sun is a deadly laser *
*(when focused through a tv size fresnel lens)
When he used sunlight to make popcorn:
*taste the sun*
@@enzymus5562 *how it feels to chew the SUN*
@@Amy_Sax ye
Justoboy13 not anymore, there’s a blanket
It isn't really a laser but it's okay, I know what you mean
Done this, it's super fun and almost instantly chars wood to just straight carbon. If you scrape the burned powder off multiple times you can slowly burn through a 2x4. Also, melting pennies then sliding them into cold water makes some super interesting warped pennies
"We should probably wear gas masks"
"Nah.. It's just led."
lead*
He said puter
Pewter*
He said coper pennies
*penys
Heavy Metal poisoning?
Is that the thing you get after a Rock concert?
Espeacilly after a Metallica concert
Wacken!!!
Most dad joke ever
no you only get poisoned from nu-metal
@@fuckthedumbsh1t nu-metal?? what????
florida man burns solar pannels and posts it online
CreationsCollide Florida man melts pot with the sun and proceeds to pore it on girl friend
Only in Florida
Florida man Burns house down with a giant lens.
Ohio man moves to Florida and realizes how similar they are to each other.
@@kostman23 that's a oof
More dlp stuff. Please. I work with these projectors and you’re the first person ever to come close to making me understand how they work.
Im so sorry for you
I had a little 1 ft square (rigid) Fresnel lens from Edmund Scientific when I was a kid. It would focus the light into a circle about 1/4 inch in diameter, and it would melt bricks and cause pavement to explode. This was much bigger, of course, but I was doing it in the front yard.
7:58 when he mentioned grant i shed a tear for that great man
every body a gangster till the fresnel lens start burning
Castsmith best joke ive read all year
lmao too true!
A couple years ago we ended up with a friend's junk projector TV.. but after not being able to fix it, just ended up throwing it all out.. Now I'm really annoyed we didn't save the big lens thing. damn.
I worked at goodwill and took the lens off one that was going to be tossed. It's only a little better than a normal big magnifying lens.
Jake : * melts anything
My Brain : "TOUCH IT !"
?
Natural selection at its finest
Me Exactly! lol
The backyard scientist finished off the video by committing a crime with the power of the sun.
Huh? What do you mean?
@@leavethemkidsalone860 it is illegal to destroy money, the penny
I love how the light makes the smoke look rainbow 🥰
Anyone else wish he could make more videos?
Me! 🙋♂️
Me too
Yessss
It is 1of the 3:
1. He doesn't have much spare time
2. Recording and editing takes him a while
3. He's lazy
Perhaps, ya know, he has a REAL, ACTUAL, PHYSICAL life?
It doesn't make a difference if it's been done before, just make sure you do it better. :-)
That's true! Or at least have fun doing it :p I was thinking I could make it track the sun, attach a solar cooker to it, or something to distill water but then a small project turns into a huge thing ya know?
@@TheBackyardScientist I always enjoy your videos! Keep up the great work. :-)
My family had a rear-projection tv many years ago. This one had 3 lights in the back - red, blue, and green. One day I learned there was a setting that allowed you to change where each individual light's focal point was, so that if something was off kilter you could adjust it back to where it should've been. After a little tweaking of the red and blue channels, turned it into a pseudo-3D television. Had to have those old-school 1 red lens, 1 blue lens glasses to get it to work and the effect wasn't great since nothing I watched with it was made for 3D, but things did look more three dimensional.
At any rate, it was a neat little science experiment.
As an AV tech, just dropped in to shout out your (fairly rare) correct pronunciation of the word "fresnel." It was named after someone, after all. Credit where credit's due.
The smoke and focal point is one of the coolest practical demonstrations I've ever seen.
Hey bro love the videos keep up the good work. I think you're one of the soul TH-camrs that are able to deliver fun and entertaining video footage while still being educational. Thanks 😊
👏 Bravo! Such true words!
Clicked so fast i burnt my skin
Louie Bueno LoL same
So worth it though 😉
@@drewwatchesyt hell yeah
Louie Bueno Clicked so fast I could have cooked a chicken
His mrs almost burnt her testicles.
4.2 million subscribers yet the mic isn’t the best
Still love your vids :)
iiJxkez needs a better camera man too. Made me sick.
What if you stacked like 10 of these in a giant death ray?
I imagine it would have to be like 5 meters tall but worth it.
It would be worse than this. The goal is to have as much SURFACE as possible. meaning you'll have to build a bigger fresnel lens, or put lenses next to the center, then use mirrors to redirect the light to a center point ( and using different focal lenghts, because the light ray for adjacent ones would be a lot longer.
Or instead have other ones next to it, but with the same focal point.
Meters 💀
Concentrating heat onto another plastic lens….hmmm. I wonder….
Fighting inflation by melting pennies with a giant old TV magnifier.
Gotta do your job in the economy
I have an idea, try melting every single metal and mix them together and make a supermetal
Nice idea!
It would be an amalgam, seen Cody's channel or Nyle Red for an explanation.
@@Scott_C *Nile red :)
HO LAM YIU oof
Those are called “High Entropy Alloys”
That smoke demonstration to show the light beam was really good
Thumbs up for TH-camrs named Kevin 👍
Wot r u
My brother has a 9x12 magnifying glass tray thing. We were messing around with it outside and we were quite surprised with how strong it was. We burned words into real leather boots, melted the garbage bin, set the grass on fire etc. We weren't expecting it to work so God.
What's interesting is that, unlike other ways of cooking or smelting, this is actually heat-neutral, b/c the heat is achieved by concentrating sunlight that would otherwise hit the earth anyway, just distributed accross a greater area. I've been thinking a lot lately about the importance of finding heat neutral (or negative, if that's possible) methods of powering our activities. Even our air-conditioners are not producers of heat; they work by moving a substance through a tube, compressing it at one end thereby concentrating the heat, blowing it with air so the air heats and it cools, then expanding it on the other end so the heat disperses, and then blowing air past it so the air cools down and it heats back up, rinse, repeat. This is heat neutral, but electric grids powering such machines often make the world hotter. Ideally, it's solar, but if it's wind or water, if you think about it, it's taking kinetic energy on a macroscopic scale, and using it to generate current through a wire, which heats up, i.e., produces movement on a microscopic scale. Coal plants, on the other hand, are much worse; they take chemical potential energy and, well, they just slopilly cross out "chemical potential," transforming it into usible electricity and kinetic energy, but also, into tremendous amounts of heat, which isn't even the worst of it, but I doubt anybody doesn't understand greenhouse gases at this point.
I coulda watched half an hour of you melting/burning stuff
Westerners are very destructive in nature.
Backyard scientist is a underrated youtuber
Cool! I've been having fun with one of these solar death rays for a while now. I'll be posting more videos this summer.
Doctor Octopus - “The power of the sun, in the palm of my hand”
Impossible
Humans: very possible
E.T.s: I am the sun, the moon, an atom, I am consciousness that morphs into any being
Now, imagine taking a screen with a one mile radius to space (outside the Van Allen Belt) and focusing the sun’s UV rays onto a single point the size of the penny. No flames could form, but energy would be HIGHLY concentrated on that single point.
I think they called that the death star didn't they?
😂
OMG I WAS WAITING FOR AN UPLOAD FROM MY FAV TH-camR FOR SOOOOOO LONG HERE IT FREAKIN IS
Nobody:
TheBackyardScientist: *harnesses the power of the sun to melt sunglasses and metal*
TheBackyardScientist: *melts a solar panel and sunglasses with the sun*
4/10 of an am.... or 2/5? Reduce your fraction man!
Hahahhaha great video!
Shaving cream cans are great for exploding. I once stuck one in a fire upside down with the top below the coals. Blew the top off of it and it shot up straight like a rocket on a column of foam. Neat!
Love you videos! The only thing that annoys me is that you edit in 60 fps... You get so much more out of showing the slow motion clips in 24 or 25 fps.
It's not really high speed when you play it in 60 fps.. The slo mo guys made a video on this!
TheBackyardScientist should do a collab with The SlowmoGuys
My notification just popped up I haven’t been this early 👀 much respect from Ireland 🇮🇪
Im irish too :)
you should fire your camera assistant, he missed half the shots and the few ones he got right are overexposed.
lol i dont pay my brother so i cant fire him ;) in his defense its hard to get the exposure right going back and forth on the fly.
I couldn't watch the video to the end as the camera shaking that much on 60fps made me feel ill...
@Austin Friedner careful man... that is too far. lol
Burning things with sunlight through a giant magnifying glass?
*_Archimedes wants to know your location_*
i loved the smoke demonstration showing how it focuses!
Heavy Metal Poisoning?
I still think a better band name would be Actinide Series.
Florida man harnesses the power of the sun
Calling Kevin the _Florida Man_ is an insult. Lol.
5:41
Dude , if YOU dont have heavy metal poisoning by now then I don't think anyone does !
I boiled a 2oz lead fishing weight in under a minute with the fresnel lens out of a Mitsubishi rear projection TV & it would catch wood on fire instantly! I had to keep a blanket over it & store it in my shed because even light coming through the window & hitting it could have started a fire. Mine was that powerful straight out of the TV, you can also polish them to make them reach temperatures above 2000°F!
In order to help keep the direction of the sun to the lens at 90 degrees I screw a small 1/2" id X about 2-3" long tube to the wood frame. For storage you turn it so the tube is parallel to the lens. To power up you turn the tube 90 Degrees to the lens and turn the lens so you can see the sun through the hole in the shadow of the tube on the ground. Since there is a nail or screw through the tube you will get a circle of light split in two. Simple quick and easy. You could use something like a chopstick but something hollow is much easier to get in aim.
*That's how DLP projector works*
_i'm sorry_
Spongebob SquarePants
that’s how nino works
Hahahaahahahahhahaahahahahahahahahahahhaah
They actually have a really great picture for the tech.
7:10 “hold out your hand... it’s quite cool”
Man, you never cease to impress!
"overclocking a solar panel"
LTT where ya at?
I use a pretty standard magnifying glass, but it starts instantly and has a very sharp focal point. I can write your name on a popsickle stick with it. Very relaxing activity.
dis mans gonna make a explosive bow
*this
Nice prediction
@@user-Monalisa *dis
I feel like the suns average power per m^2 In Ireland is like.. 11W/m^2 on a decent day
I've been there, sounds about right! Rained for 2 weeks straight :p
I love that you use metric units! Proper scientist.
“Now let’s try the clear sun glasses” lol bro, those are safety glasses! I enjoy your Florida man creations!
"Uh, solar panel dust! Don't breathe this!"
U should build mr freezes gun
"lead pellets for you BB Gun..." wouldn't recommend putting metal in your airsoft gun ahahaha
I made a whole series of this before grant and you, gotta love it! They are fun to play with. You can boil water with it too. Solar cooking with this is a thing as well. I do have a play list on my channel, sadly it did not get 400k views like yours.
So I have been binging this guys videos, and I can honestly say this guy is the archetypical Florida man.
Explosive bow???😉
Yep!
Nice!!! Can’t wait!😁
Isn’t the intensity of light “candela” not watts ?
You are mixing up a physical quantity (cd) and a unit (W). Apart from that neither of those represent the intensity, which has the unit W/m^2
Lumens .
@@jensbrenner1134 A candela is a measure of *luminous intensity.* That is, it measures how bright something appears to be, to the average human eye.
I don't know what you mean by "physical quantity".
Both are describing something in the physical world. If anything, the Watt is more physical, because it doesn't rely on the subjective experience of human vision.
that's intensity not power
Imagine if you used your powers for good
Hey chief I've got a question for ya. Do you have any Temperature readings??? What different sized focal points achieved. In particular what was the max you were able to reach?? Thanks for all your time u freely give to everyone!
Amazing ! Did you polished the glass at all? What brand and model tv was it ? Thank you very much!
*I just set things on fire by staring at them.*
Well you are Chuck Freaking Norris
My man just committed a federal crime on camera 🤦♂️
Allaan Snackbar what’s the crime ?
Allaan Snackbar no melting a coin is apparently okay if its for educational purposes, go check out that video of the guy who made a sword out of pennies.
4:52 Just me or does he looked like a mad scientist?
Yes
Bro aount to pull the lever to make franinsine alive
At 5:00
He does not get enough attention. He is really underrated.
Rest in peace Grant Thompson
1980-2019
He was a legend.
Thanks for using safety equipment (goggles) on this one!
Dude.... If I ever get into bullet casting this looks like a dam efficient way to melt bulk lol
Cam you make a smelting furnace for making metal ingots with this lense?
I’m literally the dumbest kid in every one of my classes but I’m addicted to science channels for some reason...
Do you have a blue Homall chair? I noticed it when you were sitting down talking about the projector and I personally own one myself. It's random, yeah, but I just thought it was cool.
Dude!! Love your stuff, been watching for years!!
So... hey BYS! This is only the second time I’ve ever requested a video from any of my favorite TH-cam folk. So... here’s what I want to see:
What happens when you add salt to boiling water? I mean, we all know that salt, water, and ice makes for a colder cold than ice by itself... but...
What happens if you add salt to boiling water? How much salt does it take to change the behavior of boiling water? How does that affect the thermal properties or behavior of boiling water?
My hypothesis:
Since you’re making the water denser, more energy will be spent maintaining the temp of the mass, which means the max temp will drop from 212°F to... say... 190°-200°F. But since it’s denser you’re essentially increasing the surface area of contact with the inner chamber on a molecular level. So if you measure the temp delta over time of the inner chamber with plain and then with salt water in the outer chamber, the salt water will heat it faster and the max inner temp will be closer to the temp of the outer chamber.
Possibly the salt water double boiler will exceed the max inner temp of the plain water because of the increased efficiency.
Is there a max amount of salt that is effective, or does it turn into diminishing returns as the salinity increases?
And does the increased energy use of heating the denser salt water offset the more efficient heat transfer between the inner and outer chambers? What’s the total energy consumption to evaporate 100 ml of frozen water from the inner chamber starting with room temp plain or salt water?
Actually that was really fun to write out... 😉
Hope to see it soon!! 👍🏻❤️
Laughed so hard when he had the stroke trying to say heavy metal poisoning.
8:11 that sound made me laugh way harder than it should have lol (after i left the comment i clicked on the time like ten times in a row and god i have no idea why that was so funny to me but it totally was)
Hey could this be applied to desalination as a near-free heat source? For example, a reservoir with a roof made entirely of these built in an ideal location for sunlight sloped with a collection/cooling coil coming from the outside?
The the last generation of 1080P Mitsubishi DLPs had the absolute best picture out of any televisions out there.
Very cool. And are you excited to see the Sagittarius A supermassive black hole?
I want to try using a fresnel lense in place of a forge to make knives. You'd have to be very careful not to melt the steel, and you'd probably need to wear welding goggles while your heating it up, but I think it could actually work! I'm talking about carbon neutral blacksmithing here, and I'd love to hear some feedback.
Carbon neutrality is a scam.
I used to repair DLPs! Those color wheels are more fragile than you think!
"Whip cream is now my favorite thing to destroy"
"Sad watermelon noices"
Can you try to put 4 lenses side by side and use an optical fiber from your laser welder and see if it possible to weld using this high energy beam?
glad you gave a shout out to the king of random