This is great. An excellent way perhaps to light an indoor garden during the winter. Water and a splash of bleach in the PVC pipes should stay clean and clear for years.
I'm surprised that the light remains internal to the fiber. I would have thought with the resin it would be bleeding out light and very little would come out of the end of the run. I didn't think the light would bounce internally like a normal optical fiber. Nice job!
GREENPOWERSCIENCE Grant Thompson - "The King of Random" this is definitely worth a mention. My two favourite 'mad scientists' at the same place at the same time. Isn't the interweb just awesome (and so are you guys!). Keep up the inspirational work. I truly owe my RUclips channel efforts to you both. Cheers, from a devoted Subscriber
+tsc RECYCLE e-scrapper +Grant Thompson - "The King of Random" I agree completely I have been following you both for years and have been able to replicate several of your projects! You guys are fantastic there should be schools based around you guys!
You should make some transparent concrete bricks with this. It's just concrete poured over fiber optic cables or marblized with resin to look really cool and let light in from the outside!
Oh, additionally, I thought about making a passive sun clock with transparent concrete. It would be made of multiple bricks, and each brick would have the cables laid at a different angle. Each angle would grab light at a certain hour of the day. You could even shape the cable into corresponding numbers. I thought just color coding the cables would be neat and mysterious to everyone else. You could form it into a wall in your house perhaps or make a scaled down version just for outside.
Cerebral Thank you for the idea. I will see what I can do. Maybe an entire wall. Denise and I have poured a wall to our building that weighs about 200,000 pounds. All mixed in a small mixer:-) 10'x40'x10"thick. That was 10 years ago. Not doing that again but it is awesome.
GREENPOWERSCIENCE What would be the cost of such an application of making a single brick, with dimensions? Is there a way of making resin float on top of oil, to keep the cost down? First make some kind of empty brick with one side missing (the end?) in a form, then fill with oil then cap it off with resin. If it floats, you have like a big candy with a jelly filling.
Cerebral G'day, Well, there's a simpler way to do it, known as the Sundial which detects Genius Children, because both Isaac Newton and Christopher Wren apparently constructed Reflecting Ceiling Dials for their Bedrooms when they were 13, both without having ever been told the idea was known to be feasible... Place a high-quality Flat Mirror, level, on a Window-Ledge facing the Equator..., and calibrate the Hour-Lines Radially from the Reflected Meridian as it appears inverted on the Ceiling. If the building is Square with True North you can calculate and pre-Draw the Hour-Lines and smaller divisions..; but in most instances it'll be more practical to mark it by Observation, using Local Apparent Time, Zone Standard Time, or Daylight Saving Time as required, marking the lines on the Equinox... A Fibre-Optic Sundial for an Interior Room could be contrived, but it makes about as much sense as an Open-Cockpit Supersonic Jet Biplane, or having Sexual-Intercourse while lying on the Sand in the Surf ; it's a great image, and it sounds Really COOL, to anybody who hasn't got a clue what they're talking about. In my experience... Have a nice day, ;-p Ciao !
you can fill tubing with silicone and blow it loose with the compressor when cured to make your own gasket orings. 1st time seeing someone do fiberoptics however.
+GREENPOWERSCIENCE I wasn't able to find a link to the resin you're using for this on your website, and the LED source just links to a generic search on ebay. I thought youd have listed the best or very good suppliers
Would it be possible to use these fibers to direct high intensity focused sunlight say from a Fresnel lens to another location? Possibly make a sun powered wielding like tool or something? Might be cool to experiment with!
Fiber optics transfer radiation. So, how much heat that is transferred from sunlight is determined by which wavelengths are transmitted. Some of them transmit in the infrared spectrum, and some are even fiber lasers.
there would also be problems with the fact that fiberoptic cabes puts the light greatly out of focus wich might make using te light at the other end hard.
Most of the sun's heat comes from the visible spectrum. But most fiber optics are designed to only transfer light in the infrared spectrum, which is pure heat but it's only w small portion of the heat in sunlight. Most of the heat in sunlight is in all the colors that you don't see reflected from an object, because they were turned into heat. If you could find a fiber optic cable that transfers visible light, you could then focus it with a lens and use the heat.
I'd like to suggest another way to remove the tubing using a trick some use to remove insulation from wires. Drill a hole roughly the same diameter as the tubing in a sturdy bit of wood such as a 2x4 that you can clamp down. Then, drill the sharpest screw in from the side of the wood with just enough of the tip penetrating into the hole that it scores the tubing without damaging the resin inside. This way, you can draw the tubing through the hole, accurately scoring the tubing and not the resin.
Thanks so much for sharing your findings. Have you found any super-flexible resins/urethanes? Looking to make short cables for use in goose neck sheathing.
Hi Dan, Thanks for this video. I'm interested in fiber optic for the use of transporting sunlight to a dark room for growing plants. Do you have any information about the effect on light spectra, efficiency of this resin and potential decrease of efficiency with increasing length of the fiber?
would this be cheaper than buying normal fiber optics. see i plan on doing this to a house so during the day the house will be lit up with the fiber optics.
brandonhughes7 The advantage to this is larger diameter and is good for shorter distances. If you are doing a long run, fiber cable is a better option. This works good for 8 feet or less. I would suggest trying a few DIY and see if it works for your applications.
MIRROW tube, before resin u let tube aluminium (or like paint that) paint, thin layer (and let/suck other paint again out)(and let try) and then resin to tube ? Or paint after (irrigate briefly paint the inside out or sprying). Conuse/spring tube can make tu suck light outside? Or suck light with clear plastic bottle (with water (North side covered folium or alu.painted)) and fiber tube inside cap .
GREENPOWERSCIENCE --- Question??? what if you did not use resin with the pvc tube but insttead alumaplated the inside of the pvc pipe? then from the solar collector bounced it into said pvc pipe at a 45 degree angle? I mean angle of reflection = angle of refraction so it would bounce back and sorth like a saw tooth through the tube till all the light comes out the other side? .. I mean even if you have to split toe pvc pip in have to do the alumaplating... you could join it back together and it woldn't really hurt anything right?
Have you tried to concentrate the sunlight and focus the beam at one end of the fiber optic line, send it to the inside of the house and reverse the process amplifying the light back then check how much infrared was transmitted throughout the fiber. If acceptable that could make a cool day light source.
Okay Dan, let's design a funnel to collect the 9-4PM sunlight and channel it down through a PVC pipe into a room. I'm envisioning a cut-away upside-down cereal bowl shaped parabola.
Here's a thought: Is it possible to light up solar panel(s) having a light source in a different area that light cannot reach to power up a battery using the homemade fiber optic lighting?
I really liked this video. I saw a video the other day about a translucent concrete that uses fiber optics. Have you seen or heard of this yet? I think it's called Litricon? I think this would be great to do something similar.
interesting video. Thanks for sharing this. Have you tried to draw these fibers down to thinner cross sections? I suspect that these are urethane type polymers. A simple low temperature furnace, that heats a slug of cured resin to say 150 or 200C might allow you to extrude/draw the softened polymer out to a thinner cross sectional diameter. Lots of potential here for some very interesting projects! thanks again, Doug
nitrous dude The UV cure resins can be blobbed in a semi-shaded area then drawn out with a stick into the sunlight. This creates long fine strands that cure instantly up to 100 feet in length. A gravity fed system with a UV light source could also work for thicker strands.
GREENPOWERSCIENCE I think in practical terms, it needs to be thermally drawn, rather than drawn in a gel state. The idea isn't just to get small fibers but rather, small, coherent fibers that are individually clad in a material of differing refractive index. Your light carrying capacity would likely increase significantly if you coat the cured polymer with a low index of refraction substance. although air obviously has a much lower index, the surface of the polymer core will become contaminated, reducing internal reflection and so, efficiency. Ultimately, the idea is to create a "stacked" preform, which contains multiple clad fibers that are optically distinct so thermal drawing is necessary.
+nitrous dude Dude, you are missing the fact that the resin is not thermoplastic, it's thermosetting. Hey Dan, why not just leave the poly tubing on it?
so during the hardening process direct sunlight makes bubbles.. so you could make several areas of the tube light up. this could be used for artistic optic light statues/installments. have you ever tried to expose just a limited area to direct sunlight? are the bubbles random ... or is the process like controllable?
Love this content,i need to make optical cable and set it up so that it goes from my roof to my room and i need DIY parabolic mirror dish to focus light into this optics with IR filter because of heat.I need light in my room,as my room window is not getting any light because of terrace in front of my room.And possibly put few photo-sensors to measure light brightness and move dish accordingly towards more light with some arudino and programming(sun is the source).What do you think about that?And does it help to transfer light better if i wrap pipe with alu foil if pipe is transparent?I know wrapping it wont bend light properly ,but will it help somewhat?I probably wont make that it moves because that would require more money for motors.
Pretty cool man I can't to see more from you. The Giant Fresnel lens melting rocks are my favorite to watch. Last year I sanded and polished a linear 50'' lens to a spot lens and its lethal!!! Have you aver heard of someone converting a linear TV lens to a spot lens? So far I may be the only one that has done it and I have not heard of anyone else besides myself converting a linear TV lens to a spot lens. I look forward to your reply even though you are often flooded with comments faster than you can reply too. Go to my channel and see my lens in action. I also just created a play list as well.
elemental smurf Endothermic takes in energy in this case sunlight to start and control the reaction rate. Heat released from resin curing is exothermic but since the catalyst is continuous UV exposure the endothermic process is required throughout the cure. It is not like an MEKP catalyst. I did incorrectly state that the release of heat was endothermic resulting in bubble expansion when it is actually more exothermic.
TheFounderUtopia This is an exothermic reaction as there is too much energy in the reactants and therefore the excess is released as energy/heat, endothermic reactions absorb heat/energy and thus cool the surroundings.
TheCrazySquirell Which means the resin doesn't cool through endothermic reaction. It absorbs heat, RAISING temperature, THEN loses it through basic temperature differential. I wasn't saying the person you're talking to is right, I was saying you were wrong.
TheCrazySquirell Which is exothermic. Again, I didn't say you were wrong about everything, only the point you made about how an endothermic reaction gets cooler. Which is, definitionally, the opposite of true. I understand what you were trying to say, I'm just nitpicking. The SURROUNDING temperature cools (kinda). The subject of the endothermic reaction itself, does not.
some resin, tho its vague which one he's using and the website isnt helpful either. Im wondering if there is a flexible polyurethane thatd be better than a resin. also the curing process is more user friendly than resins Im thinking
Anyone notice Dan from GREENPOWERSCIENCE and Grant Thompson - "The King of Random" or here exchanging compliments?? If you haven't subscribed to their channels.... what are you waiting for? Dan was super awesome enough to subscribe to my channel. cheers.
Please slow down your speech! I am losing you each time. The brain needs a few seconds to digest scientific material or DIY demos. This is a fascinating concept, but I have to see it over 3 times to follow what is being said.
+Lass-in Angeles Yeah, no. That's why it's a video. I hate when they talk to slow or repeat themselves and i spend 15 minutes figuring out if they have anything important to say.
This is great. An excellent way perhaps to light an indoor garden during the winter. Water and a splash of bleach in the PVC pipes should stay clean and clear for years.
Did you try, NightHawkInLight?
I'm surprised that the light remains internal to the fiber. I would have thought with the resin it would be bleeding out light and very little would come out of the end of the run. I didn't think the light would bounce internally like a normal optical fiber. Nice job!
Awesome idea Dan!
Thank you Grant! The Lost-foam casting on your channel is AWESOME.
GREENPOWERSCIENCE Grant Thompson - "The King of Random" this is definitely worth a mention. My two favourite 'mad scientists' at the same place at the same time. Isn't the interweb just awesome (and so are you guys!).
Keep up the inspirational work. I truly owe my RUclips channel efforts to you both.
Cheers, from a devoted Subscriber
+tsc RECYCLE e-scrapper +Grant Thompson - "The King of Random" I agree completely I have been following you both for years and have been able to replicate several of your projects! You guys are fantastic there should be schools based around you guys!
tsc RECYCLE e-scrapper
This is fantastic! It can be used to direct the light in you house from a central light source or, natural day light illumination. Awesome idea!
You should make some transparent concrete bricks with this. It's just concrete poured over fiber optic cables or marblized with resin to look really cool and let light in from the outside!
Oh, additionally, I thought about making a passive sun clock with transparent concrete. It would be made of multiple bricks, and each brick would have the cables laid at a different angle. Each angle would grab light at a certain hour of the day. You could even shape the cable into corresponding numbers. I thought just color coding the cables would be neat and mysterious to everyone else. You could form it into a wall in your house perhaps or make a scaled down version just for outside.
Cerebral Thank you for the idea. I will see what I can do. Maybe an entire wall. Denise and I have poured a wall to our building that weighs about 200,000 pounds. All mixed in a small mixer:-) 10'x40'x10"thick. That was 10 years ago. Not doing that again but it is awesome.
GREENPOWERSCIENCE What would be the cost of such an application of making a single brick, with dimensions? Is there a way of making resin float on top of oil, to keep the cost down? First make some kind of empty brick with one side missing (the end?) in a form, then fill with oil then cap it off with resin. If it floats, you have like a big candy with a jelly filling.
Cerebral Different times of year would have different angles of inference at the same time.
Cerebral
G'day,
Well, there's a simpler way to do it, known as the Sundial which detects Genius Children, because both Isaac Newton and Christopher Wren apparently constructed Reflecting Ceiling Dials for their Bedrooms when they were 13, both without having ever been told the idea was known to be feasible...
Place a high-quality Flat Mirror, level, on a Window-Ledge facing the Equator..., and calibrate the Hour-Lines Radially from the Reflected Meridian as it appears inverted on the Ceiling.
If the building is Square with True North you can calculate and pre-Draw the Hour-Lines and smaller divisions..; but in most instances it'll be more practical to mark it by Observation, using Local Apparent Time, Zone Standard Time, or Daylight Saving Time as required, marking the lines on the Equinox...
A Fibre-Optic Sundial for an Interior Room could be contrived, but it makes about as much sense as an Open-Cockpit Supersonic Jet Biplane, or having Sexual-Intercourse while lying on the Sand in the Surf ; it's a great image, and it sounds Really COOL, to anybody who hasn't got a clue what they're talking about.
In my experience...
Have a nice day,
;-p
Ciao !
you can fill tubing with silicone and blow it loose with the compressor when cured to make your own gasket orings. 1st time seeing someone do fiberoptics however.
+GREENPOWERSCIENCE I wasn't able to find a link to the resin you're using for this on your website, and the LED source just links to a generic search on ebay. I thought youd have listed the best or very good suppliers
Would it be possible to use these fibers to direct high intensity focused sunlight say from a Fresnel lens to another location? Possibly make a sun powered wielding like tool or something? Might be cool to experiment with!
It transfers light not heat :(
Fiber optics transfer radiation. So, how much heat that is transferred from sunlight is determined by which wavelengths are transmitted. Some of them transmit in the infrared spectrum, and some are even fiber lasers.
there would also be problems with the fact that fiberoptic cabes puts the light greatly out of focus wich might make using te light at the other end hard.
Have a lens at the end to refocus the light.
Most of the sun's heat comes from the visible spectrum. But most fiber optics are designed to only transfer light in the infrared spectrum, which is pure heat but it's only w small portion of the heat in sunlight. Most of the heat in sunlight is in all the colors that you don't see reflected from an object, because they were turned into heat. If you could find a fiber optic cable that transfers visible light, you could then focus it with a lens and use the heat.
I'd like to suggest another way to remove the tubing using a trick some use to remove insulation from wires. Drill a hole roughly the same diameter as the tubing in a sturdy bit of wood such as a 2x4 that you can clamp down. Then, drill the sharpest screw in from the side of the wood with just enough of the tip penetrating into the hole that it scores the tubing without damaging the resin inside. This way, you can draw the tubing through the hole, accurately scoring the tubing and not the resin.
@1:06 Endothermic processes do not release heat, they require energy. Exothermic processes release heat.
The person I am arguing with seems to disagree, not sure if trolling or unable to google.
This stuff is interesting. How do you use these in practice though? Are there practical applications?
uv cure seems ridiculously expensive in the UK
I bought 5ml for £3.75, that's over $5 for 5ml.
Would a slow cure resin work?
Thanks so much for sharing your findings. Have you found any super-flexible resins/urethanes? Looking to make short cables for use in goose neck sheathing.
if you plan to do more than just once, make a little jig with a blade jut long enough to vur 1/10th mm short of the tubes wall thickness.
Hi Dan, Thanks for this video. I'm interested in fiber optic for the use of transporting sunlight to a dark room for growing plants. Do you have any information about the effect on light spectra, efficiency of this resin and potential decrease of efficiency with increasing length of the fiber?
You could use " Vintage Ship Glass Prism Sky Lights" at the end of the pipe to disperse the light in your home vs only having the spot light effect.
would this be cheaper than buying normal fiber optics. see i plan on doing this to a house so during the day the house will be lit up with the fiber optics.
brandonhughes7 The advantage to this is larger diameter and is good for shorter distances. If you are doing a long run, fiber cable is a better option. This works good for 8 feet or less. I would suggest trying a few DIY and see if it works for your applications.
Very cool idea. Thanks Dan!
Howdy sir! What resin in particular did you use?
MIRROW tube, before resin u let tube aluminium (or like paint that) paint, thin layer (and let/suck other paint again out)(and let try) and then resin to tube ? Or paint after (irrigate briefly paint the inside out or sprying). Conuse/spring tube can make tu suck light outside? Or suck light with clear plastic bottle (with water (North side covered folium or alu.painted)) and fiber tube inside cap .
GREENPOWERSCIENCE --- Question??? what if you did not use resin with the pvc tube but insttead alumaplated the inside of the pvc pipe? then from the solar collector bounced it into said pvc pipe at a 45 degree angle? I mean angle of reflection = angle of refraction so it would bounce back and sorth like a saw tooth through the tube till all the light comes out the other side? .. I mean even if you have to split toe pvc pip in have to do the alumaplating... you could join it back together and it woldn't really hurt anything right?
Jesse Mercury A light tube will work but larger diameter tuning is required.
Have you tried to concentrate the sunlight and focus the beam at one end of the fiber optic line, send it to the inside of the house and reverse the process amplifying the light back then check how much infrared was transmitted throughout the fiber. If acceptable that could make a cool day light source.
Hello, I would like to make a uv cure resin at home for low cost. Is it possible? What items would i need?
Thank you for the great video :)
Is there a way you can take the resin, and make a thin or thick piece of window from it so when sone type of leds hit it, it would light up?
yes some clear acrylics show the edge lighting, but then youd be better off not using resin but cutting a panel to your size
Okay Dan, let's design a funnel to collect the 9-4PM sunlight and channel it down through a PVC pipe into a room. I'm envisioning a cut-away upside-down cereal bowl shaped parabola.
Here's a thought:
Is it possible to light up solar panel(s) having a light source in a different area that light cannot reach to power up a battery using the homemade fiber optic lighting?
Kenneth Bowen Light is Light.
I really liked this video. I saw a video the other day about a translucent concrete that uses fiber optics. Have you seen or heard of this yet? I think it's called Litricon? I think this would be great to do something similar.
Well done, thank you for the info.
interesting video. Thanks for sharing this.
Have you tried to draw these fibers down to thinner cross sections?
I suspect that these are urethane type polymers.
A simple low temperature furnace, that heats a slug of cured resin to say 150 or 200C might allow you to extrude/draw the softened polymer out to a thinner cross sectional diameter.
Lots of potential here for some very interesting projects!
thanks again,
Doug
nitrous dude The UV cure resins can be blobbed in a semi-shaded area then drawn out with a stick into the sunlight. This creates long fine strands that cure instantly up to 100 feet in length. A gravity fed system with a UV light source could also work for thicker strands.
GREENPOWERSCIENCE I think in practical terms, it needs to be thermally drawn, rather than drawn in a gel state. The idea isn't just to get small fibers but rather, small, coherent fibers that are individually clad in a material of differing refractive index. Your light carrying capacity would likely increase significantly if you coat the cured polymer with a low index of refraction substance. although air obviously has a much lower index, the surface of the polymer core will become contaminated, reducing internal reflection and so, efficiency.
Ultimately, the idea is to create a "stacked" preform, which contains multiple clad fibers that are optically distinct so thermal drawing is necessary.
+nitrous dude Dude, you are missing the fact that the resin is not thermoplastic, it's thermosetting. Hey Dan, why not just leave the poly tubing on it?
+TheOldGuyPhil Not missing the point.
Some UV set polymers can be thermally formed.
Another nice video well done and thanks
Sunlight interferes with the hardening of the catalyst with the resin. Cure it indoors.
did you post the link to buying resins?
can this resin bond solar cells to glass? will it stay clear or go milky?
lez briddon It stays clear as it is designed for surfboards but can release from glass.
Watch:
ruclips.net/video/Z185kaLX3bA/видео.html
Always a good video
Where can you purchase the rods?
What are we using this for?
Can any one suggest price optical tube
whats the name of the resine?
Wow! Nice work. Very informative video.
Thank you Bill.
so during the hardening process direct sunlight makes bubbles.. so you could make several areas of the tube light up. this could be used for artistic optic light statues/installments. have you ever tried to expose just a limited area to direct sunlight? are the bubbles random ... or is the process like controllable?
Try it. This comment suggestion is full of people waiting on this guy to do their experiments for them. That's not how it works.
Can you send me a step by step to do this? I´m from Brasil and I dont understand very well english, but I can read good.
Love this content,i need to make optical cable and set it up so that it goes from my roof to my room and i need DIY parabolic mirror dish to focus light into this optics with IR filter because of heat.I need light in my room,as my room window is not getting any light because of terrace in front of my room.And possibly put few photo-sensors to measure light brightness and move dish accordingly towards more light with some arudino and programming(sun is the source).What do you think about that?And does it help to transfer light better if i wrap pipe with alu foil if pipe is transparent?I know wrapping it wont bend light properly ,but will it help somewhat?I probably wont make that it moves because that would require more money for motors.
Amazing stuff!
So you could bring sunlight into a cave? Could you track the sun with one of your lenses to light up a cave? Or cook underground?
Pretty cool man I can't to see more from you. The Giant Fresnel lens melting rocks are my favorite to watch. Last year I sanded and polished a linear 50'' lens to a spot lens and its lethal!!! Have you aver heard of someone converting a linear TV lens to a spot lens? So far I may be the only one that has done it and I have not heard of anyone else besides myself converting a linear TV lens to a spot lens. I look forward to your reply even though you are often flooded with comments faster than you can reply too. Go to my channel and see my lens in action. I also just created a play list as well.
hi guys nice video...
Regarding the pipe... u can explain et show a video please??
Great video. :-)
an endothermic reaction means it becomes colder, i think you mean exothermic
elemental smurf Endothermic takes in energy in this case sunlight to start and control the reaction rate. Heat released from resin curing is exothermic but since the catalyst is continuous UV exposure the endothermic process is required throughout the cure. It is not like an MEKP catalyst. I did incorrectly state that the release of heat was endothermic resulting in bubble expansion when it is actually more exothermic.
some UV set polymers can be drawn.
You mean exothermic reaction right? endothermic would mean that the resin cools as it sets.
An endothermic reaction ABSORBS heat, and therefore the material gets increased temperature. An exothermic reaction RELEASES heat.
TheFounderUtopia This is an exothermic reaction as there is too much energy in the reactants and therefore the excess is released as energy/heat, endothermic reactions absorb heat/energy and thus cool the surroundings.
TheCrazySquirell
Which means the resin doesn't cool through endothermic reaction. It absorbs heat, RAISING temperature, THEN loses it through basic temperature differential. I wasn't saying the person you're talking to is right, I was saying you were wrong.
It's not absorbing heat, it's releasing heat/energy.
TheCrazySquirell
Which is exothermic. Again, I didn't say you were wrong about everything, only the point you made about how an endothermic reaction gets cooler. Which is, definitionally, the opposite of true. I understand what you were trying to say, I'm just nitpicking. The SURROUNDING temperature cools (kinda). The subject of the endothermic reaction itself, does not.
Wow thank you!!
what the chemical name and number for this resin
This is great.
Sir
I want a tube for a practical
How can I contact with you
what is the liquid used in this video
some resin, tho its vague which one he's using and the website isnt helpful either. Im wondering if there is a flexible polyurethane thatd be better than a resin. also the curing process is more user friendly than resins Im thinking
where can I buy this in Canada ???
Google sells it.
PVC or Vinyl tubing ok?
pvc is a vinyl
How's possible
thanx very helpful
Anyone notice Dan from GREENPOWERSCIENCE and Grant Thompson - "The King of Random" or here exchanging compliments??
If you haven't subscribed to their channels.... what are you waiting for?
Dan was super awesome enough to subscribe to my channel.
cheers.
i can dig it....
nice
***** mabey this is an idea for your xenomorph cosplay
Hey what gives, what happened to the funny bloopers at the end of your videos?
Please slow down your speech! I am losing you each time. The brain needs a few seconds to digest scientific material or DIY demos.
This is a fascinating concept, but I have to see it over 3 times to follow what is being said.
pause the video
+Lass-in Angeles
Yeah, no. That's why it's a video. I hate when they talk to slow or repeat themselves and i spend 15 minutes figuring out if they have anything important to say.
Click the gear icon next to the CC icon - (- - )_