I want someone to invent a device to emit anti-photons that counteract regular photons, therefore making things dark, and then sell the product as a "darkbulb"... :D
@JoelHudson6 жыл бұрын
twocvbloke to use in Darkrooms everywhere?
@twocvbloke6 жыл бұрын
Or for people to be able to sleep during the day for nightshift work... :D
@thrjygdcmnbfdzfsa6 жыл бұрын
twocvbloke I’ve had that idea for a while. I reckon it’s an awesome idea, but I’m not the sort of person to work out how to do it hahah
@twocvbloke6 жыл бұрын
Neither am I, I'm just basing the idea on matter & anti-matter neutralising each other (though in their case, with some powerful releases of energy upon obliteration of each other), I could be talking absolute bollocks though cos I have no knowledge of things like anti-photons, it just sounds cool... :D
@Big_Loo3 жыл бұрын
I legit thought the "small" one was a phone 😳
@NineEyeRon3 жыл бұрын
And big was iPad?
@RDCST3 жыл бұрын
Is the new Apple 42G Pro Ultra with iFlash.
@theaverageblitzer43513 жыл бұрын
Peak brightness of 1000000 nits
@seannot-telling98066 жыл бұрын
To quote Marvin "There was supposed to be an Earth-shattering kaboom!"
@mrclown74696 жыл бұрын
bigcobdotcom ?
@JoelHudson6 жыл бұрын
MrClown bigcobdotclive??
@johnsonmay31816 жыл бұрын
Bigclivedotcob
@scwfan086 жыл бұрын
bigcockdotcom
@__aceofspades6 жыл бұрын
BigCobdotcom, The #1 gay farmer matchmaking site.
@cougarhunter336 жыл бұрын
Came looking for a Douglas MacArthur pipe and then came a few more times.
@ChaplainDaveSparks5 жыл бұрын
Is that the "Big Dipper" I see in the dimmed LEDs? 😀
@iamdarkyoshi6 жыл бұрын
Clive, can you imitate a series parallel array with 1W LEDs to see how much the full power mismatch is? I'm curious to see if it balances out or gets worse. The more even illumination makes me think that it evens out at higher currents...
@NonnofYobiznes6 жыл бұрын
iamdarkyoshi Great idea.
@herauthon6 жыл бұрын
can one bake eggs on led-overdrive ( the led ovendrive )
@1marcelfilms3 жыл бұрын
Imagine the whole ceiling with these
@nabarnes6 жыл бұрын
"Made in CHNA" - Where?
@farx40706 жыл бұрын
I've seen products made in CHIN, This isn't the worst
@wildbill46806 жыл бұрын
😂👍👍👍
@generaldistrust5 жыл бұрын
Short for CAHOONA?
@kraio-sfu5 жыл бұрын
Council of Household Neutering Apparatuses
4 жыл бұрын
EVERYTHING is made in China!
@alecjahn6 жыл бұрын
I can't wait for the inevitable goliath COB that is at least one square foot.
@blackirish7816 жыл бұрын
Alec J why would they stop there? I'm sure we'll see at least three square foot ones sometime soon. Even if they don't work, doesn't seem to stop them.
@TheAmpair6 жыл бұрын
Real "Goliath COB" arrays are officially measured in Hectares ;-)
@johnfrancisdoe15636 жыл бұрын
Alec J EEVBlog already uses that size or bigger as studio lights. Each is the size and look of an office ceiling tile, looks like one when off and is powered by a radio controlled constant current supply bought separately. One of his recent video was repairing some of those supplies.
@TheAmpair6 жыл бұрын
"Goliath COB arrays are controlled by inserting or removing graphite rods into the power supply, keeping supply output within
@pauljs756 жыл бұрын
Or if they make one with the backing the same size as the emitter element, so you can seamlessly array them. Replace the backing element with one that has built in fins or some form of heat sink mountings, and make all electrical connections on the back. Mounting would also be done from the edges or the back side. (None of those edge tracks as they are doing with them now.) Then the size would be limited by how many in the array you could drive. This would also allow you to make different shapes depending on how you tile them.
@ShaneMatthews276 жыл бұрын
Who else wants to cover an entire ceiling with these and run them at low power so they don't get hot? That would look wild!
@stuart8taylor4 жыл бұрын
Current limiting it down to 1 or 1.5 amps it would still make a nice panel lamp for the back of a van (camper conversion). But as Clive says current limiting is vital.
@PiezowDimD6 жыл бұрын
I loved the drill torture test ! They are 600 leds on AliExpress COB sold as "400W(50w when 12v)" panels. I wonder if they are the same as they are more costly. They seems to be assembled by many shops on the same boards.
@gustavgnoettgen3 жыл бұрын
If my LEDs are not matched and I still want to wire them together in such numbers - is there a reasonable way to get it done without adjusting single LEDs?
@christianrottler3 жыл бұрын
I've been subbed for quite a while so how could I've missed this vid 🤔🙄?
@RANDALLOLOGY6 жыл бұрын
With a good heatsink, and a fresnel lens, I bet that would make a awesome street light for ones property.
@zx8401ztv6 жыл бұрын
It needs some kind of diffuser to spread the light a bit more, it would make a good general backlighting unit :-).
@punker4Real5 жыл бұрын
you can get one from a Broken LCD screen
@twocvbloke6 жыл бұрын
It'd be fun if they did a mains voltage version, it'd make drilling that hole a lot more interesting, especially if the step-drill hit a live wire....... :D
@twotone30706 жыл бұрын
The nerd version of Russian roulette.
@ethanf59616 жыл бұрын
Twotone more like Chinese roulette.
@tyttuut6 жыл бұрын
It would actually be interesting to see that panel slapped across a fully-charged lead acid battery or a power supply of the same voltage. Make sure to collect all the magic smoke so you can put it back in, though.
@farx40706 жыл бұрын
No go the li-po high current route
@tyttuut6 жыл бұрын
Music Central Even better!
@farx40706 жыл бұрын
The Tyttuutface yeah man around 48volts @ 50amperes would do that board real good, oh yeah, and did I mention smoke
@michaeltempsch52826 жыл бұрын
A fully charged lead acid battery will be ~12.6V at rest (which Clive got up to in the video, see 13:39). Just off the charger it'd be a bit higher, but should drop down fast to 12.6 as soon as you start to draw any significant current. Now, 14.4 from a running car w/ proper charging, using decently thick leads, might be into smoke signalling territory tho :-)
@timothybarney72576 жыл бұрын
I've got 72 2V (Enersys Powersafe DDmP 125-33s) batteries rated 2000Ah each available for testing at work. If that's too much, 48 rated @ 1600Ah as well.
@namespacetoosmall6 жыл бұрын
Your camera didn't want to know about more accurate focusing, the cheat sheet was sharper before the refocusing. Is your camera disagreeing with your videos maybe? 🤭
@bigclivedotcom6 жыл бұрын
Yeah, sometimes it gets a false focus. I didn't spot that until I saw it on a bigger screen.
@namespacetoosmall6 жыл бұрын
I think it's messing with you, Clive. It has its own sinister agenda. 🤣
@phinok.m.6285 жыл бұрын
6:40 oh yeah thanks for "focusing", that was very helpful.
@Darieee6 жыл бұрын
You can also note how amazing the CRI is on the incumbent LEDs .. That's the main thing I noticed - everything going all haunted hospitally all of a sudden
@raymondmucklow37936 жыл бұрын
I dig it, 6mm hole right in the middle, I thought you were gonna mount it someplace. Boy I was way off.
@raymondmucklow37936 жыл бұрын
?
@phils46346 жыл бұрын
Still waiting for the smaller ones to arrive! Really tempted to buy this one, although I've no idea what to do with it / where to put it right now!
@Th3laughingman6 жыл бұрын
Thank you for using metric and imperial measurements!
@maksoel91796 жыл бұрын
Thank you for the video's I'm also an electrician and this kind of honest reviews are very helpful.
@nabarnes6 жыл бұрын
I would be interested to see what the current draw is if the weedy thin cables are replaced with big chunky ones - presumably it would then just be limited by the (thin?) tracks on the PCB. I'd also like to see what happens if it's suitably heat-sinked and run at 14.7v (i.e. 12v bulk charge voltage) for a while - does it pull 200W? Does it explode in a huge ball of plasma? Finally, say I do want to plug it into a battery - what's the best (cheapest/safest) way of limiting the current to something sensible?
@bigclivedotcom6 жыл бұрын
You could use a few 1 ohm resistors either in series or parallel depending on how bright you wanted it, but they would possibly get hot.
@BrunoPOWEEER6 жыл бұрын
Hahahaha I clicked in this video expecting to see LED experiments and ended up watching the best “LED ring” camera light idea ever hahaha ohhh yeaaahhh!!!
@bernzeppi6 жыл бұрын
Be good to see how evenly the LED’s light under higher power than just lowest power. Also be good to see a spectral analysis for the sake of use in critical colour analysis such as textiles industry, film industry etc.
@infinitysolutions7455 жыл бұрын
Sir, firstly, please share the product details and where it is available (in which site - amazon/ebay etc.). Secondly, is it possible and worth using this in commercial projects, especially industrial projects, from height ranging from 8 meters and above to achieve atleast 350 - 400 lux ? Also, let me know if possible what could be the life of these types of Big COBs on a 24 hour operational conditions ( yes, we will take into account proper current and voltage rating as per the specs provided and mounted on a Heat Sink calculated as per wattage). I appreciate your knowledge in this area and request your guidance and suggestion on this product and similar ones, reply will help us a lot. Thanks
@Paul-gz5dp6 жыл бұрын
Like always, you do a great review of products.
@SebBrosig6 жыл бұрын
You were insinuating that these may be factory rejects, that is, somewhere else you can buy these with all beautifully matched LEDs at a much higher price, and you can run those at or near the 200W. But running LEDs well below their maximum design power is well worth it in terms of Lumen/W so surely, buying one of these could actually make economical sense, given the low £/LED.
@killsalot78 Жыл бұрын
watching this on an HDR monitor makes me want some goggles myself
@kyme323 жыл бұрын
holly crap...that's big...i've never saw such a big cob...
@lrastus66926 жыл бұрын
Clive ... interesting video . Perhaps it would be possible to access the individual sections and use a current regulator on each one . This would be a practical way to avoid the high cost of a prime quality unit . Also , would a polarizing filter on the lens help with the glare ? Edit : I see that smaller strip style units are available , perhaps these would be better for current regulator assemblies ... provided that the mismatch of the leds on each panel is not too great .
@DubiousEngineering6 жыл бұрын
Omg ... I have to buy some of these! ... :). Lighting for my mobility scooter! ... pimp my ride!
@Mr.T4LLY-06 жыл бұрын
Get a bigger battery else your 11 miles will be down to a 3 mile radius? Or fit a dynamo :)
@xavierayayaell5466 жыл бұрын
They call that the Jaywick special.
@herauthon6 жыл бұрын
put a windfarm on the bike - electrify while drive . . one fan for free
@Steve211Ucdhihifvshi6 жыл бұрын
portable nuclear reactor would be the go. Im sure russia would sell one to you.
@purdy94316 жыл бұрын
Xaviera Yayaell , Are you talking about Jaywick Essex ?
@konayasai6 жыл бұрын
Should we pass a hat around and buy Clive a decent lux meter? It would be interesting to know how close these things are to spec.
@bigclivedotcom6 жыл бұрын
I've got a couple of basic light meters, but the tests would have to be done in a very controlled area.
@konayasai6 жыл бұрын
bigclivedotcom Wouldn't a darkroom suffice, or a dark room in a pinch?
@HappySlappyFace6 жыл бұрын
bigclivedotcom cardboard box
@garryh693 жыл бұрын
did you have to move it at 0:40 i was half way through counting the led's :)
@Wibinable6 жыл бұрын
With an appropriate case and low current, these would make excellent SAD lamps (seasonal affective disorder, ie. bright lights to keep your mood up). Only a simple diffuser needed.
@girlsdrinkfeck6 жыл бұрын
2:00 if u squint it looks like space invader aliens
@somerandomdude43006 жыл бұрын
A interesting subject for a video would be lightning strike detectors they seem pretty interesting
@stefantrethan6 жыл бұрын
Now come on Clive, that's not fair! You know how long shipping takes from China, the 70W one hasn't even arrived yet! Somewhat glad the larger one is poor, I'll put the 70W one on a heatsink with a DC/DC and makita battery holder so I have a mobile worklight.
@HVAC-BDE6 жыл бұрын
stefantrethan same here... Shit takes like a month to arrive.
@stefantrethan6 жыл бұрын
Yea but you can't complain about free shipping.
@july8xx6 жыл бұрын
just sing "i'm going to get you on a slow boat from China".
@amorphuc4 жыл бұрын
I've got quite a few things from PanPan Supermarket. Not panels like this but I've been pleased thus far. I'll have to check them more closely now.
@homeslice11796 жыл бұрын
And people say "size doesn't matter"...
@Ped07726 жыл бұрын
The focus was better BEFORE using the cheat sheet :)
@EsotericArctos4 жыл бұрын
I've just been waching this now. I noticed the panel has a clear "DC 12V" label on it. That would mean it would never run at 200Watts if you put only 12 Volts on it. It's an interesting panel though.
@AlthrinSucks6 жыл бұрын
You can actually use that LED panel as a ring light, the issue is that the light needs to be diffused more, if you had a translucent plastic to send the light through, it might fix your glare issue.
@jamest.50016 жыл бұрын
Great video. I always enjoy videos from you keep at it !!
@imark77777774 жыл бұрын
Is it me or is the very distinct patterns is the Grim Reaper or something similar like a walk sign sideways
@TCreatorO4 жыл бұрын
16.66A at 12v to get 200w, that is an insane amount of juice for LEDs in general lol
@Spector_NS5_RD6 жыл бұрын
LOL that hole you had drilled in that LED panel looked like there was some speck of dust on my screen.
@bryce115446 жыл бұрын
Clive, when you said die LED, you reminded me of Goldfinger.
@littlehuey56793 жыл бұрын
I wish you would put where to buy link in your description ! But good videos!
@Freekniggers3 жыл бұрын
I need walls and ceilings like this.
@prakharmishra30003 жыл бұрын
To die of mental strain from all the light
@Xiefux6 жыл бұрын
damn clivey, your led's are an absolute unit
@cup_and_cone6 жыл бұрын
200 watt? I don't understand how you could dissipate that much heat through a static heatsink only, at least if you want any life from it. You would definitely need cooling fans with a heatsink.
@GigsVT6 жыл бұрын
You should take one of these outside at night and show us what its like at actually 200 watts. Assuming it survives long enough.
@JohnnyX503 жыл бұрын
would make a cool 'computer' display for a scifi project, i know it would have to be seen in the dark and kept at low voltage but would look cool in a darkened room like a computer console in sleep mode ;) yeh my imagination is weird, thats me for ya x
@paulsengupta9716 жыл бұрын
Mount a clock module in the hole. Run it so it's glowing reasonably dimly.
@GrandadIsAnOldMan6 жыл бұрын
If you scan the low voltage images of the panel with a QR code reader you get nothing.
@MrTridac6 жыл бұрын
Try DataMatrix
@zachburke89066 жыл бұрын
That’s very interesting.
@LordGryllwotth6 жыл бұрын
It is a Pokemon
@MrDoboz6 жыл бұрын
how do you know?
@Aaron_b_c3 жыл бұрын
Forgive my dumb question: how are you limiting the current? Are you driving with a PWM pulse? I thought that it wasn't possible to limit current and that's why they were doing PWM
@bigclivedotcom3 жыл бұрын
I used a current limited power supply. You could use a resistor or electronic regulator to get the desired current through these panels.
@ianhosier40423 жыл бұрын
Hope you are not going to plug it directly into the mains like the previous video you did using a smaller cob. It was funny when it went bang though!
@TGtonk5 жыл бұрын
How do you wire these? I have one from China and had no manual and I see 3 sets of +/- pads..
@bigclivedotcom5 жыл бұрын
They usually just have them all commoned for convenience of wiring.
@incandescentwithrage6 жыл бұрын
Still useful as a camera ring light for glossy objects if the bench and light were offset 10degrees?
@eerotillanen89143 жыл бұрын
One question: Could you pls give me the link for finding that big panel? Tried with the parameters you said on ebay with no luck.
@kevingarfias17743 жыл бұрын
Do you think I can use one of these for a small indoor around a half square meter ??
@rickyhoward58806 жыл бұрын
Clive, can you upload a short video of you running it at its full 200w for science??? :D Smokey!!!!
@1bigsyd6 жыл бұрын
I wonder what these are actually manufactured for,never seen anything using anything this size or it’s smaller brother
@SianaGearz6 жыл бұрын
Maybe for ceiling lights that span the whole ceiling or are just that big? For lights used in exhibition installations? Would also make sense as a video production light, but i haven't seen any made like this and i don't think CRI is all that up to snuff, not with that kind of mismatch.
@sumobear17774 жыл бұрын
What do you use to adjust the voltage? Ive got a 405nm laser id like to dial down to take a picture of.
@bigclivedotcom4 жыл бұрын
The laser might require a minimum current to lase properly. I use a variable bench power supply.
@philcarpfishing11112 жыл бұрын
i want to make a lightbox with a cutout logo in plywood infront of it. I want it to be very bright because i will have a color plexiglas 3mm between the glas and the cutout. which do you recommend? its a closed box 20x30cm and its closed so no aircooling 😁
@fishyerik6 жыл бұрын
Actually a common "12V" lead-acid car battery is slightly less than 14V without load, when in good shape and fully charged. If you pull 200W from it, the voltage will quickly drop, and the actual wattage through that cob connected to car battery will probably fall well below 100W within a few seconds as it needed 12.61V to pull 5.06 amps.
@ZillionPrey6 жыл бұрын
I think I need to get one of these to experiment with
@nickdesert73046 жыл бұрын
i love waching these videos wen u take apart stuff and see how it woks keep going on with the vids!!!! :-)
@crawfish0696 жыл бұрын
Nick Desert Clive has lots of videos like this.
@MinecraftMIB6 жыл бұрын
There is even bigger LED COB. For example 500W and 1kW but they are really expensive.
@tncorgi926 жыл бұрын
Any COB can be 1Kw, briefly.
@agarceran6 жыл бұрын
Have you seen the driverless 150w version? There is also a 150w version of this that is actually "3 cobs in a cob", each 50w cob with its own pads.
@mattburrows26156 жыл бұрын
Looks like they may be fairy efficient at lower power levels too, eg through a dc-dc converter with current limiter. I hope my 200w 240v cob has matched leds (yet to be tested) thanks for the geat info once again!
@bigclivedotcom6 жыл бұрын
The mains powered COBs often have the LED all in series anyway, so it's less critical.
@marializianichols6483 жыл бұрын
I have the 300watt cob led under test .9 months 24/7 on with 13 volt dc and still going
@crawfish0696 жыл бұрын
That's big enough to melt my face! It's just ridiculous!
@azimalif2663 жыл бұрын
How do you cool the 1st one? What type of heatsink can you use?
@peterrolfe5283 жыл бұрын
Hey man I'm looking to buy some leds to make a diy board and the information on the leds is just numbers and letters to me I really need to know what kind they are and if I can use them for a grow light
@peterrolfe5283 жыл бұрын
My email is rolfetamworth@gmail.com can u please email me so that i can reply then that way we can chat and i van show you these leds and cobs this bloke bort a heap but has no idea what's what or how to read the codes or anything.
@djsnowman066 жыл бұрын
Hey Clive... I don't see a link in the description. Just curious about this cob
@MichaelBeeny6 жыл бұрын
No mounting holes for heatsink.
@bigclivedotcom6 жыл бұрын
I'm wondering if it would be better bonded with thermal silicone glue to avoid buckling when hot.
@ChallengeTheNarrative6 жыл бұрын
bigclivedotcom would be nice if you come across a decent broad spectrum cob for growing plants. (Not for the stigmatized majjy purposes 😄). Looking out for a cheap ass solution. Like comment if you've responded 👍
@blancsteve48196 жыл бұрын
We like lights that can be used to grow naughty flowers. It seems odd that a power supply is not "on board" by the addition of a few extra surface mounted components.
@johnfrancisdoe15636 жыл бұрын
Blank Steve A proper power supply for these would be the size of a pack of cigarettes and a similar price to the panel itself.
@blancsteve48196 жыл бұрын
John F. Doe - I have noticed some commercial manufacturers content to use a Meanwell power supply as a "black box" soloution. While being easy; they are quite pricey. It might make sense to make the light more modular. My imagination has a several panels on flexible posititioning arms....Like standard lamps only more grown up :)
@bigclivedotcom6 жыл бұрын
I suppose it might be viable to use standard 12V LED power supplies (not the halogen version) to drive panels like these.
@blancsteve48196 жыл бұрын
+bigclivedotcom the standard power supply sounds like it is optimised for cheapness of construction rather than electrical effiency. Is it worth chasing those saved Watts ? I watch an American chap called "Greengenes garden" who makes these things. He had the YT channel shut down a while back but it is back up now.
@Nathan1975Liggy3 жыл бұрын
Hi Clive. I have a question that I should realy know the answer to. I wish to make a PCB for an IR Torch, it will have 100 X IR LED's aranged in rows of 10. It will run off a 5V power bank The kind you get to charge a phone. The spec's of each IR LED are, Forward Voltage 1.3v, Forwards Current 50ma. The problem I am having in my brain is, what is the best way given the above details of aranging the LED's on the PCB? PARALELL or SERIES? Many thanks pal.
@bigclivedotcom3 жыл бұрын
Two or three LEDs in series with a resistor, and then lots of those sets in parallel.
@Nathan1975Liggy3 жыл бұрын
@@bigclivedotcom Awesome thanks Clive
@keshticlesp62696 жыл бұрын
I don't really have a use for one of these but is so want one!
@jetli7404 жыл бұрын
for 200w cob led is the wire too small on these led panel?
@markfergerson21454 жыл бұрын
You answered many questions nobody asked, but- why did the photo you used for the reflectivity demonstration look like you'd photographed a circuit board through bubble wrap?
@bigclivedotcom4 жыл бұрын
It was a macro image showing the weave of the fibreglass in the laminate.
@markfergerson21454 жыл бұрын
@@bigclivedotcom Ah, okay. Thanks. I've never seen it quite so prominent.
@userPrehistoricman6 жыл бұрын
Exactly how would one mount this to a heatsink? All the mounting holes are on one side...
@bigclivedotcom6 жыл бұрын
I'd guess a clip or thermal glue. Mounting holes on such a large COB could result in bending and warping.
@debochch6 жыл бұрын
Clive, would it be possible to use some of those varible resistor ICs found in 240v LED modules to limit over voltages and then power theses things from a car?
@bigclivedotcom6 жыл бұрын
They're not designed for such high currents. It would be better to use either a simple resistor to drop the small voltage difference, or a low drop regulator.
@looptheloopish5 жыл бұрын
Who sold this? I want to get one.
@BravoSixBC Жыл бұрын
Hello, have you tried put them all leds in series and put under the sunlight to see how many volts you get? Tip: RPP Nigel Cheese technology
@tierangreen Жыл бұрын
I want to put something like these in old Mole Richardson 1K light fixtures. Zip/Softlights. Why can’t LED’s make that happen yet?!
@Qwertydex5 жыл бұрын
the cheat sheet actually defocused it it was focused perfectly already
@MatthewSlaymaker6 жыл бұрын
Do all LED manufacturers have to match chips on their LED panels or just the cheap ones? I would think that good process- and quality control would eliminate the need for high-end manufacturers to match their chips.
@miniquadsmegafun36196 жыл бұрын
There are filters photographers use to eliminate glare and reflections.. it’s not an ND filter or if filter but I believe a polarizing filter.. you just rotate them until it blocks the light you want eliminated and is used in shooting cars or water or really anything shiney and would be perfect when used in conjunction with your ring light here!!! Awesome stuff and new sub!
@bigclivedotcom6 жыл бұрын
I think the polarising filter works best with distant point sources like the sun.
@avejst6 жыл бұрын
Ended an interesting object Thanks for sharing 😀👍
@RDCST3 жыл бұрын
Well, now I know that I can make a hole to screw a heat sink. LMAO!
@p__jay6 жыл бұрын
Can you run a led strip on 230V with resistors?
@bigclivedotcom6 жыл бұрын
You could, but the strip would be live and the resistors would get very hot.
@railgap Жыл бұрын
the big panels still give softer shadows than smaller sources