How deep can you dive with your cheap amazon dive flashlight / torch? We are going to use our deep sea chamber 10 000 000 high pressure chamber to find out how waterproof cheap flashlights are!
@@hene193 well maybe he can work something out... It would be cool to see what these watch company's say the watches can do and see if they are lying to us..lol
I wonder if putting a bit of air in the line would help... Water's incompressible. And with the way hydraulics work with Pascal's law, that large press probably has some force scaling going on by putting the pressure into a smaller area.
Thinking if you had a leg of the line with air, you could read the pressure off that bit of line as air pressure, and it'd still work out right for those lower pressure scenarios.
From my scuba diving times, I remember that the limit for cheap back-up lights was not imploding, but rather damage due to internal leakage, causing electrical failure. Great test again my friends!
Low voltage electronics are usually fine with water, but only for a short time. When the corrosion takes place, ~0.03mm thick copper traces on the circuit board are gone quite fast, especially if there is salt involved. Salted / non-pure water can also cause "immediate death", if there is some sensitive signals, that cannot tolerate a slight conductiveness of the water (for ex. mobile phones etc). I would guess that the first flashlight broke immediately because the contacts moved physically when the plastic gave away
@@vmark1111 I'm a little surprised that salt water wouldn't immediately short them out since it's so much more conductive than regular water. But I guess if the switch is on the path of least resistance would still be through the LED circuit, so even if the battery is hemorrhaging charge through the salt water the light would still be on while it's doing so.
@@facedeer That's right. Compared to the LED, the water is not a short circuit. More complex flashlights will die quicker due to the thinness of PCB traces and fragility of sensitive electronics.
For me was interesting that the plastic one started flickering right before its death. I guess that there are some microchips to control the LED and water inside made a small current leakage that influenced the chip on the PCB.
This reminds me of the batyskaf (special submarine) Trieste. The only pressure tight compartment was the Ø 2 m crew sphere. To save space in the sphere, most electronics, e.g. the batteries were placed on the outside and were subjected to the full pressure at almost 11 km depth. The electronics bathed in transformer oil so the pressure could be transmitted without filling up with conductive sea water.
I think you'd have a hard time getting enough resistance to the flow of water to build up any pressure. With higher pressure you might be able to make it with finer-ground coffee, although it'd probably taste pretty terrible and you'd need a finer filter too.
@@jimsvideos7201 Largest issue is channeling, which can be seen on normal espresso machines. It's the classic path of least resistance, similar to a hole in a filter. It leads to that portion being majorly over extracted while the rest of the coffee is barely extracted at all.
Yes, salt water should have worse effects. And perhaps add a piece of dye-soaked paper in the lens housing, so it might be possible to see when water enters (water in the lens housing should change colour).
Hi! Great Video! I have that yellow flashlight! I have taken it to 40.5M depth(turned it on and off multiple times). .5 Meter over recreational diving allowed. So, i got 2 of those yellow flashlights for 20 dollars + 2x 18650 Batteries( worth 20 dollars) ... And they work great. A diving flashlight for 10 dollars with a battery worth 10 dollars in it??? ... Its a steal, be careful with the ring and seal, make sure it had silicone lubricant, it works great for me, 3 years going. ANOTHER PLUSESESES: Yellow flashlights DO NOT DRAIN BATTERY IN STORAGE... Huge Plus!!!! DOES NOT OVERHEAT OUTSIDE OF WATER.... AGAIN... 20 DOLLARS FOR 2 WOTH 20 DOLLARS OF BATTERIES INCLUDED.... Its definitely worth the price.
You should try an old Nokia Lumia 800 as they where indestructible. I remember hearing one got dropped into a Norwegian fjord and it survived under water for nearly a year. Just needed drying and charging. This is the same phone that could hammer nails into wood.
How about a cheap transperant lighter? Also a chap transperant lighter that can be refueld? The valves have a very small diameter - should need a lot of pressure to open it with the water. Or it will just explode^^
Great idea, and great execution, thumbs up. And for other prodects to test, what about trying IP68 mobile phones, like Samsung Note 8, 9, 10, or maybe 20
@@Bl4ckD0g the glass would probably break on the snow globe because the liquid inside of a snow globe is a set density if it was a stiff type of rubber that made up the snow globe then yes your comment would be correct but it is solid glass which does not like high pressure on one side of it and low pressure on the other side
Lauri, I think more people would guess it could go even beyond 1km. I did a mcdonalds cup time lapse and did a quick askaround to see what people would guess, how long a paper cup can hold liquid. Some of them said it would last a couple of hours, but other said it would last years, or maybe it would never collapse... People think differently. btw I did the test and it went for 231 days
@@gordonlawrence1448 yes, that's why I mentioned that rust will happen when it gets wet (as in what they just did, with regular water) but as a separate sentence, agreed that salt water would act differently, and probably short it out.
@@benjamindudley3798 I'm talking about electrolysis not rust. Rust is caused by oxidation. Electrolysis is electricity splitting compounds that in the case of seawater are highly caustic. They are distinctly different things from a chemistry and physics perspective.
This week's extra content - Bambi animal. It seems harmless, but it can eat your apple trees so we must deal with it. . . . . . SCRAM! AWAY! Into the forest you go!
You two are awesome, charming, and your content is fascinating to watch. I love waking up to a new video that's...ummmm.... hot off the press! Much love from Utah, USA!!
the second one, thats impressive, mark that one for sending to the bottom of the challenger deep, damn. lol. the only thing I can think of testing aside from venus drones that would also include extreme heat and acid clouds, would be maybe a GoPro if there was any way to properly test maybe just a GoPro add-on diving housing for one to see when it implodes. making a kit to run wires to a GoPro to monitor when it cuts out recording would be a PITA, so maybe just the extra diving housings, maybe (shrug). Great vids. B)
If I remember correctly, the ratings for how waterproof a thing is are based on an amount of time at a certain pressure - e.g. 30 minutes at 10 meters. It would be interesting to see “endurance” tests of lights like this - how long will they stay on at the sorts of depths they’re likely to be exposed to, or how long before they start to fill with water? Would also like to see tests of lights intended for work environments, like the Streamlight Dualie, or Pelican models. Excellent video- it’s fun to see you refining these things over time. 👍👍
For most purposes, clean fresh water, his non-conductive. The cheapest and easiest way to waterproof a flashlight for diving, is to fill it with distilled water. You don't want to leave it filled that way, you want to dry it out after using. Rust is a problem. This probably will work with just about any device. If you want to be really sure that it will be stand up to pressure and not rust, you fill it with a light mineral oil. The key to keeping things from being compressed is to fill them with incompressible fluids. Way back in the early '70s or late '60s, 3M developed a fluid that was non-conductive and clear and could be oxygenated so that you could even breathe it. Their demonstration consisted of an aquarium filled with the fluid, with a working television inside of it, along with a small mammal, I don't remember which, but something like a hamster.
Fill it with water and set it outside until it freezes, then add pressure to thaw. Maybe don't fill completely so you have room to add liquid to transmit the pressure? Reverse: Pressurize liquid water, set outside to get cold, then release the pressure to see it freeze.
Please fill some cheap electronics with mineral oil or glycerin to make them pressure proof. Like one of those cheap plastic dive lights. Or even better a cheap action cam, you might need a vacuum to get the air out of the lens. It would also be cool to see how the refraction changes.
The pressure chamber looks strong and well made. Will it also work under vacuum if you connect a vacuum pump? You could make interesting videos with the opposite pressure.
Of course it will work under vacuum as vacuum chamber only needs to be strong enough to hold 1 bar. So using this would be overkill. They have made videos with a vacuum chamber before, check them out.
Things light flashlight electronics can handle freshwater exposure for a little while. It would go out in fairly short order most likely. But yes the plastic one probably failed because of a loose connection
Nice 👍 Can you pressurise some wetsuit material? It’s spongy and compresses under pressure, reducing buoyancy and insulation. It’s something you don’t actually see happening though, it’s hard to spot when it’s in use.
I would like to see you crush one of those green camping propane cylinders, or perhaps one of the similar ones for small torches. Both with the fuel exhausted and when new.
Ya realize that a "when new" full propane bottle would explosively combust under this kind of pressure, right? The little Schraeder fill valve would leak once internal bottle pressure was surpassed and then ka-boom. Think Diesel engine.
@@johndowe7003 It’s not clickbait when your actually showing all the video’s he actually says it in. Duh! Click bait and Bait & Switch are 2 completely different things!
Still waiting for them to make a deep sea chamber 100 million and crush liquid hydrogen into metallic hydrogen. I wonder if water is really that non-compressible.
Yeah distilled water doesn't conduct electricity and only the impurities in fresh water conduct at all, still not very much tho. But salt water is obviously a different story - my almost new Mares 15RZ torch leaked at 50-60m in salt water and the battery chamber bubbled brown fluid when I opened it. GREAT video thanks guys, that plastic torch totally blew my mind!!!
I thought the water pressure would push on the switch on the second light and turn it off but not break it - either from the pressure or the release of pressure if it's a switch that turns the light off when you push it in and then let it pop out again.
The fresh water is not conductive and so it did not short out the batteries. Though, it may be a different story for saltwater, as that is much more conductive.
Missed opportunity. You could’ve shown us the battery of the flashlight. That would tell people that are going to go down that far if a battery will last at that depth. Is the first flashlight a bulb versus LED? If the second flashlight is LED then those LEDs are a lot stronger than lightbulbs. I suspect an LED will go a lot deeper.
I give a thumbs-up on this guy that tells you to use wristwatches. That would be kind of interesting. A Luminox watch would be kind of curious to see if the watch failed and the Luminous tubes would fail. Great video enjoyed it because I'm a flashlight nut🤪😂😂😂👍🍻🍺✌
5:35 LED lights are constantly flickering but they do so at a frequency too fast for our eyes to pick up. However, even non-high-speed cameras have a high enough frame rate to detect it. So the weird artifacts in the camera's image that you see are a result of the difference between the frame rate of the camera and the flicker rate of the LED bulb. If you have a high-speed camera and can play with the capture rate you'll see those moving bars move faster or slower and change in width. For reference, the "framerate" of our eyes is around 12 FPS. Anything below that and we see it as a series of static images rather than a fluidly moving image. Standard cameras are usually either 30 FPS or 60 FPS.
When doing these tests I recommend leaving some air pockets. The reason is the following: since water is not compressible, any crack in test subject will slightly increase volume of water, immediately lowering water pressure. This is totally unrealistic; when under water column, cracking will continue since water pressure will not fall. If you have some air pockets, the air will expand and prevent sudden drop in pressure.
8:50 Clean tapwater is only slightly conductive, so even with the leakage current caused by the water, the led wil still light up. Sea water is very conductive, so it will cause a considerable short circuit. The batteries will quickly run out, and any semiconductor circuitery will be biased completely wrong and likely stop working.
I've killed more than a few small dive lights. Usually what happens is the oring fails to seal after sealing it back up and it just floods. Some I've physically cracked open because they were weak plastic. But once the water gets in there, especially if you don't immediately notice, the electronics are toast. Even with fresh water it's often dead, even if it still works right after the dive. Usually the better lights will have machined sealing surfaces, be either aluminum or delrin, have dual orings, and probably deeper seated orings in that machined surface that helps prevent extrusion. It's rarely a question of reaching design depth though as to why they fail. For more spectacular fails in the pressure tank you should look at some of the larger diameter low end lights that take C or D cells. I suspect those would deform and blow quite nicely.
Glow sticks as shown in Hellboy. Can pressure activate them? Do they still work the same under pressure? Maybe they could still work at the bottom of the ocean.
Could you try a comparison between fresh and saltwater on underwater cameras? It would be interesting for me, because we had a series of cameras in the shop, which were fine in fresh water, but drowned all in saltwater 👍🏻
Did that yellow flashlight shrink afterwards? Also the aluminum flashlight would've stopped working if it was seawater instead of fresh because of the conductivity of saltwater. Edit: 9:20 You already brought up the salt vs fresh. I should have watched the entire video first.
I played with cheap electric motors in water when I was a kid, and yes simple circuits with batteries works underwater if the electrical current isn't strong enough to do damages on short-circuits, but I'm sure that batteries life will be abysmal and corrosion will happen very quickly.
