Teardown of a 2x 18650 5-Mode Zoomable LED Torch
ฝัง
- เผยแพร่เมื่อ 19 เม.ย. 2019
- Today, let's take a look at a powerful Skywolfeye "90 000 lm" 5-mode zoomable LED flashlight from Ebay that runs on two rechargeable 18650 Li-Ion cells. Let's test it, do some measurements, open it, reverse engineer it, explain how does it work and see how well it's designed.
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/ diodegonewild - วิทยาศาสตร์และเทคโนโลยี
Beautifully explained as always. Thanks for another great video!
As always, a very educational and enjoyable presentation, I always look forward to new postings.
2:38
So let's set it to _🎶🎵dee cee🎶🎵_
Ahahahaha
I liked this polarity protection, is actually a pretty smart idea and not so expensive
Extreme useful explanation how a LED-flashlight works. The electric internal components and the transistor for the polarity protection.
The schematics are quite impressive and helps to understand basic law of physics.
Beautifully explained again. Thank you 🙂
I like that polarity protection 👍👍
I love this beautiful cat✌️❤️
Always I wait for you
DiodeGoneWild
Finally you're back OF COURSEEE!!!!
Sir you are great engineer
Great video i have a good time watching your channel and i have learned so much keep up the great content. .
ur previous video was before 2 or 3 weeks and for such long time i was expecting a video about the bigger switch mode power supply!!! anyways i like this video.
Waiting anxiously for the vintage multimeter review, Diode!
Thanks for the video, I've got one of these and I was hoping there would be some way to fix the mode on high output but it looks like that isn't the case.
Two points though.
As long as they are about the same capacity you only need one cell to be protected, as soon as that one cuts off it will also cut the other off.
Secondly, don't spread thermal compound over everything. You only need a very thin film where surfaces meet, just enough to fill gaps between the surfaces. The way you put it on is like wrapping it in a blanket, you will actually make the temperature higher.
Another great teardown and explanation. THANX!!!!
your voice is so clear n awesome
special thanks great man🌺🌺🌺 the best electronic teacher ever
Oh my Cat! (Actually, yours.)
I'm here from ElectroBOOM, and I like your channel.
Thank you!
Perfectly Technical explanation. ♥️♥️♥️
Thanks, this video helped me to disassemble my faulty torch!
This channel is amazing!
A great video, thanks for sharing.
I freaking love that calculator… I had one like this, warm feelings.
Hi , I love your videos about inverse engineering !!! More about phone chargers please !!!
dont forget to do the switch-mode power supply teardown:)
Thanks for the lovely teardown once again! 270 hertz is quite visible to the human eye though if you know what to look for.
Well, 270Hz is visible if you move the torch or your eyeballs quickly, but you can't see it when you stare at it.
Actually it' Amazing how did you achieve such Hidden talent in Electronics !
Thanks
Very nice explained, Bip UP!
I really like your video and explanation :). I hope you get a teardown of the nitecore mh25gts flashlight.
Great job!
Great video
Thank you
I love your videos and hope you have a nice day :)
Wow i love your channel i didint know you had another channel you did this just for us English viewers i was watching your old videos you should bring some of them here iv been waiting for more dodgy Chinese products XD
very nice FLESHlight
it wooooOOOOOOOOooooorks
why does he sound so gay lmao
@Masterzz < Cuz maybe he uses a FLESHlight himself ;D
Those who don't know what a Flesh-Light is, just Google it, it's not to make light but something more fun. ;D
Good one!
Nice item
nice video thanks
Udělejte test solárních svítidel na zahradu, to jsou taky pěkné šmejdy.
Excellent review on the electronic aspects! What i would really like to see is a comparison in light output with the normal 3 W led torches from ebay (you made a review already for those). I like the electronic design but i really hate the care they invest in heatsinking! I had one led torch that lost the solder connection due to exessive heat and the little lens on top was molten! Its a pitty they dont care about that apect - which could be easily solved as you explained. Also i dont like the 5 modes (nobody needs it) and the fact that they drain down the cells to a deadly level without notice! So i think i will stick to the one cell models which are really nice!
Also you should return the torch because it doesn't meet its specifications! 90.000 Lumen! :-)
But many people may be very happy that they have to most powerful led-torch ever! :-) Its even better in light output than a 500W led - which is available and was build as torch already and would be enough to illuminate a football field :-)
If there is any confusion, a PN junction will appear to drop 0.6V across it when it starts conducting in the forward biased condition. Indeed it will conduct at 0.01V too, just the current is measured in electrons /second. The curve though takes a fairly steep change in direction at 0.6V and currents approaching meltdown will drop maybe a volt across the junction.
Germanium diodes will conduct at about 0.25V and I have some old germaniums that measure a fair way below that. These are considered 'sensitive' and were useful as detector diodes. Still are too. It takes some getting used to when measuring a germanium amplifier or radio, seeing those crazy voltages. They have a habit of just going 'Phutt' when you look at them though.
Schottky diodes switch much faster and have instant reverse recovery times along with lower forward voltage drop.
I wonder if you can make a germanium schottky?
Nice video well explained, What modification would i need to do for under voltage protection? so i dont kill the 2x18650 cells if they dont have internal protection?
happy Easter day
A double 18650 torch, very nice :-D
I hope that the switch on the end is better than the one in cheap pocket torches, the ones with 3 x AAA cells in a plastic holder.
They are a pain.
I'm glad that i'm not the only one to misuse sissors :-D
Ideal for reeming holes out in thin plastic or aluminium panels.
It's definitely a nice flashlight, but the chip should have contained some undervoltage shutdown function. The LED also should have a better contact with the heatsink. The switch is good. I also used to make holes in plastic bigger using scissors, because I didn't have a bigger drilling bit, or the bigger drilling bit didn't fit into my drill. Then I bought the Christmass tree shaped drilling bit. Now all of my holes look much better.
The christmas tree stepped bit looks so handy, i could have done with one years ago, when i was 20.
I would drill a hole to the maximum size drill bit i had, then use a rats tail file to get it the size i needed.
Took bloody ages lol.
I was so determined in those days lol.
Mine still going strong 4 years later 💪
That was a funny coincidence: i've got one very similar, but it is powered by 3 AAA-cells. The zoom function and the 5 modes are identical, even down to the design of the head with the print.
Thank you.
I like looking at Russian electronics.
I dig your O-scope.
Do you live near any vacuum tube manufacturing plants? That would be awesome to tour one of those.
Oh nice flashlight😏
That seems like an interesting way to change the size of the light!
What does? I cannot see any way to (say) shorten it anyway.
Nice video @diodegonewild,
Still waiting for your Computer Power Supply video!!
And also more cat and dog together in the same time!
The power supply is coming ;). Actually, the dog and the cat never seen each other. I alternate between 2 recording locations: The cat location and the dog location.
Meow
how to open the led aluminum heatsink ? opening the driver is easy but to replace the led is very difficult.
how muck led watt ?? in u spotlight I bought a 3-watt LED spotlight, two batteries. If I bought another one, two batteries also, but 10 watts, would I feel a difference in lighting?
Prrrrfect intro...
great job happy eastern
How Long Does The Battery Last once Fully Charged? And how do you know its charged fully? Thanks
I'm sorry but i think i should really worry about your explanation of the polarity protection, if you look there on the mosfet once again and it's integrated protection diode, you can see that in right polarity the current flows just through the protection diode, and in reverse polarity, the resistor just ensure that the mosfet is closed. Can you please measure, the voltage drop on the mosfet during lightning please.
If the current flew just through the diode, there would be no point using a mosfet. The mosfet turns on to bypass the diode and reduce the voltage drop. Mosfet in its on state is like a resistor and it works in both directions.
Thank you very much! My flashlight burned out a chip, I did not know number. For a long time I was looking for a scheme. Could not find. I know now what to find through your video.
Ты русский штоле?))
Tá mačka už musela skúsiť pri tvojich pokusoch :D
Great videos but I was waiting for you to take apart the switch..
what is one video from DiodeGoneWild that doest have any warning?
The cat sees the light.
A clear explanation.
love your videos. could you do one of those cheap electric faucets sold on Amazon, AliExpress and probably eBay? I really wonder if they're safe :)
Magnic light
Can you replace the LED with a red or other color as a drop in replacement?
Where did you buy the calculator from?
we miss u
I had a pressure regulator for my argon bottle with that type of cheapie chinese pressure gauges, the 200bar one became leaky suddenly (it was spectacular). When i investigated a solder joint in it had a pinhole.
Killeroz my ta sledujeme!
Hi. Look at the cat helper. Very good. Success.
Super
If you measure flicker output by LED with a light sensor, would that register same rates as you did by measuring at transistor?
I think so. A light sensor would register about 50% duty cycle at medium power and about 30% at low power. At 270Hz. LEDs turn on and off very fast, they're not like incandescent lamps.
The LED will have the same flicker rate as the transistor. You could push it up to kHz or higher and the LED can switch fast enough.
Thanks guys for your clear responses!
Electroboom should sponsor you a keysight scope
I want to buy one like that, do you recommend it ???
Such Cute Kitty 😍😍😍
Yes🤗
You could just add a washer properly sized to fit the back of the LED and smear it with heatsink compound instead of the whole inside of the LED holder.
Why dont you try a convoy flashlight? They are cheap and very wellmade
bigclivedotcom said that Li-ion batteries don't get damaged if run flat, so you should test it. IE, check the capacity before, run flat, and check the cap again.
They don't get damaged if you discharge them close to zero volts just once, but if you do it repeatedly, they definitely won't last 500 cycles. Then they may last 100 cycles, maybe just 10 cycles...
@@DiodeGoneWild It would be an interesting video. You could get an Arduino to do it automatically.
Is it real cree led or fake?
Heat sink compound is not rosin... :-) And your cat is clearly a movie star.
Thank you Super Mario.
hustá angličtina kámo, ale jinak dobrý videa :)
Looks like that metal disk should go under the LED to help it sink the heat into the housing.
What metal disk? The LED is already mounted onto a star-shaped disk of aluminium, so there is absolutely no advantage in adding an extra layer of metal. The overall thermal design of this light, like most of them, is absolutely shit.
@@johncoops6897 , the metal disk that was placed over the white plastic disk with the hole in it. It went between the lens and the LED.
If that were placed under the LED it may give more contact to the outer "pill" .and allow more3 heat transfer away from the PCB the LED is mounted on.
It looks like this thing was put together incorrectly from the factory.
@@aurthorthing7403 - The silver metal disk is simply a decorative cover. You can see it has a hole punched in it for the LED to shine through. Look at 5:45 and note that if the disk was below the LED PCB there would be nowhere for the wires to pass down into the driver PCB.
It's not assembled wrongly... it's designed wrongly LOL.
@@johncoops6897 yeah, I would put that disk under the led and run the wires thru the hole in the middle. But that's just me.
Thanks for playing.
@@aurthorthing7403 - So your plan would have wires in between the PCB and silver disk. That will not work. Think about it.
2:38 So, let's set it to DeCeEEeeEe
The video is nicceeeee (with a heavy russian accent), lol
Write the circuit/device name on schematic.
It will be helpful when i take screenshot...
Write is YOURSELF, when you save the fucking screenshot. Or name the file when you save, sheesh!
Lazy bastard stealing other people's content!
Looking at the power curve, it should be a 1 cell flashlight.
I also think that it may have been originally designed for 1 cell.
EVEN MORE SALT
Let’s screw it using a wrong tool 4:34 :D
wow are you still alive
Of course I am :). But I was travelling around Sweden and Norway and then I was helping my sister renovating an appartment. So I didn't make any videos for a long time...
No way i have the exact same flash light! even the same brand and the same skywolfeye and same Metal clip But mine came with the batteries and charger and a bike mont for 17$ CA from Amazon.ca but mine clams 5,000 lm and also claims to be water resistant and the batteries claim to be "5800mah" with over charging protection and under charging protection
"claims"
Bruh everything isn't tru about this flashlight 😅😂
Co je to za nářečí ? Dlouho jsem přemýšlel, co je to píčinl mosfet.
Super video. Ale ta izolacia na 18650ke mi pride dost "dodgy" :)
Já sem zkoumal, jestli má přibodovanej novej vršek a dno (to značí recyklovanou baterii). Proto je ta izolace oloupaná.
Cat teardown next time
0:08 Flashlight!!!!! Not Fleshlight(XXX)! That is something else....:))))))
OMG!! You've said the whole video "FLESHLIGHT"!!!!
Your accent was so funny
Nambe 2
Jar not a bucket lol
A very Soviet oscilloscope
What is the time now
18:31 ;)
@@FloppyBoom tq for your reply
@@kiranspear7185 np :) and now is 21:19
@@FloppyBoom tq for another reply ☺️
i detest those infomercial style lense/zoom lights that show the shape of the chip too, give your cat a treat for me
Why, focusing the light into a custom area is awesome...
I have 2x18650 IR flashlights for night vision hunting, I recover 18650 cells from laptop battery packs and use a *1S BMS (see eBay 112936214029)* to protect the cells from over discharge, this setup works very well in protecting the cells.
This thing can't give more light than 125W HQL bulb(RVLX for Slavs).90000lm is 1st April fool.
As far as I remember, RVL-X 125W was about 6300 lm. This LED is probably one of the cheaper ones and won't have more than 100lm/w efficiency, so this torch can give about 500lm at most at 5W going into the LED.
@@DiodeGoneWild Yes that is true.I wrote that LED torch in this video isn't even bright as RVLX 125W.I know that LED is more effiecent than other sources.When we talk about bulbs I have 200W heat bulb from TESLA.
@@zanimljivastruja7511 - LED is not more efficient than other sources. It's just that manufacturers of other light sources tell the truth. LED manufacturers, and ESPECIALLY flashlight sellers, tell huge lies. People who buy flashlights have absolutely no idea so they just believe everything that is written. It is highly unlikely that this thing would even achieve 100lm/W, since the chip will run as hot as hell and that kills the light outout.
BTW: HQL bulb (mercury vapour) is like 1940's technology, under 50lm/W. In Australia they are only sold as replacement for old streetlights, nobody would ever use those in a new installation.
@@johncoops6897 Yes especially cheap Chinese LED bulbs.I bought few years ago "9W" LED bulb which died after 8 months of use.I saw that most LED streetlights die faster than old ones.
@@zanimljivastruja7511 - the old HQL (Mercury Vapour) streetlights had a rated lamp life of 25,000 to 30,000 hours. However that was not related to "life" but because of MV having very bad lumen depreciation. This was the "design life" where light output had dropped by a certain amount so the lamps should be changed to restore full lighting levels.
The lamps themselves will literally last forever, however they get dimmer and dimmer until only emitting a weak pink/purple glow. The municipal councils in Australia loved Mercury Vapour streetlights because they never needed maintenance!