It's amazing to think how LED lighting has evolved in the past 15 years, from large lumps of layered PCBs filled with 5mm or 3mm white LEDs, to flat panels of LEDs like these pumping out 70 Watts of light, it's impressive... :D

@tncorgi92

6 жыл бұрын

30 years ago I was playing with components in my Grandfather's workshop, making random circuits, and he always told me to take it easy on the red LEDs because they were so expensive. Like a dollar apiece or something. These days we just throw crap away unless we absolutely need to save it for something.

@mathuetax

6 жыл бұрын

I guess what amazes me is the sheer light output. The first LEDs I played with (surplus HP and Monsanto) were only useful as indicator/pilot lights where there wasn't a lot of bright ambient light.

@hippopotamus86

6 жыл бұрын

70 watts of heat and light.

@gordonlawrence4749

6 жыл бұрын

I was working on LED's for Arrow Electronics (distributor) for lighting back in the 90's. Back then they were really rubbish but it was obvious the tech was on the way.

@Tekwyzard

6 жыл бұрын

Similar here. When I was a kid 35 ish years ago, I treated myself to my first LED, a yellow one. Blue ones, white ones, and UV ones weren't even a glimpse in some mad scientists eye yet. Anyway, during one of my dangerous experiments involving a mains transformer, I ignorantly left out the current limiting resistor, and melted the poor thing. It actually stayed lit as the plastic melted, at least until the leads parted company anyway, then I got an electric shock from the dangerously bare mains side as I unplugged it in a panic, hahaha, bloody kids eh?? I doubt any modern LED would even get close to surviving that punishment. I was gutted though, that LED cost me a fortune, and I stupidly killed it. Was lesson learned though. I'm actually using some 30 ish year old red LEDs for a project at the moment, because the colour and brightness of modern ones is just wrong and not in keeping with the setting in which the equipment will be used. I love the colour of those old LEDs :-)

Just want to point out that your video descriptions are top notch. Normally the only suggestion of how the viewers could get something is an Amazon affiliate link, where we find an inflated price. Here we get the right ebay search, with the right filters already on, so that we can get the best possible deal. Thanks for looking out for us Clive.

I bought several of the smaller size Clive played with in a previous video. I am using a 555 timer based PWM to dim it, and a 6.8 ohm current limiting resistor. Been running it for hours and it is still running cool. Thank you Clive for finding and playing with these things.

I just love you fascination with lighting effects. A very neat panel indeed...Thanks for the Demo.

Wohaou ! This one is my favorite COB for now on ! I bought two before the end of your awesome presentation !

I really want to buy these, but I don't need any more of them. Time to start a new project, I guess.

@thomasmcdougall614

6 жыл бұрын

LazerLord10 make a grow light from them

@agvulpine

6 жыл бұрын

Thomas: Just peel off the phosphor?

@NGC1433

6 жыл бұрын

Use them as tiles in a bathroom...

@NineSun001

5 жыл бұрын

Exactly my thought. I soon have a new bench light :-D

Nice! Got some of the smaller types you showed a video or 4 back. They work great and only 1 out of 6 had bad LED's on board but the light produced even at 12v is so overwhelming it's not even noticed. Good stuff and thanks!

Thanks dude for making this video with the current testing and such. Been looking into these large COB panels for a project.

Take it outside at night and fire it up. Let's see what it looks like.

Wow, I must get this... great big COB element ! Many thanks for the info.

0:30 almost all these ebay sellers are drop shippers. they hold no stock, they never even see any of the stuff they sell. they just list stuff on ebay and pass orders and payment, minus their cut, onto big warehousing and mailing services. thats why you see the same items with the same photos and identical descriptions listed by dozens of different sellers. you could pick any of those identical listings and no matter who you order from, it will come from the same place.

@mrgreenswelding2853

6 жыл бұрын

yeme that would explain things.

@rodsofgod6863

6 жыл бұрын

They all are drop shippers!!! All of them..

@Debbiebabe69

6 жыл бұрын

I just read up about 'drop shippers' yesterday. I always assumed the term referred to people that do business by using services that drop their shipment rather than deliver, for example myhermes, but it in fact a completely different meaning - stockless middlemen that just redivert their orders to China.

@mrgreenswelding2853

6 жыл бұрын

I just bought one from an Australian seller. It will still take over a weekto get here. Something that should take less than a week.

@gorinator

6 жыл бұрын

For some context, it's still called 'drop shipping' if it isn't the entire business model. For instance, where I work we make custom building materials. We drop ship the installation hardware. This way the customer only has to make one order, gets exactly what they need, and doesn't have to pay to ship it twice.

I like the "dumb", no inbuilt regulation stuff. That way you can put exactly what you want, and run it with no loses with a "barely enough" power supply.

New projects in future for sure ! Thanks for the great info !

Is it weird i find these videos oddly relaxing? Clive's soft voice and smooth lighting in the videos really make me relaxed.

THis just showed up and I can't believe it's been 5 years already, I bought some of these when you made this video,

Thanks Clive another great video. Makes me want to tinker and get the son involved in soldering which is a very useful skill for mending broken stuff, I've fixed lots of stuff over the years sometimes just by resoldering a wire or 2 where most would just chuck it out and buy another. Feel I need to buy some project boards so I can get him away from his Xbox for a while.

@tncorgi92

6 жыл бұрын

soldering is a good skill to have... I learned when I was a teenager and even though none of my jobs have been the type to require soldering skill, a situation always comes up where something is broken and someone says, "Does anyone here know how to solder?" You can be the one who saves the day and gets remembered when other opportunities arise.

@-yeme-

6 жыл бұрын

open his xbox and desolder a wire from something. too sneaky?

@tazz1669

6 жыл бұрын

yeme only if I wanted to die. Spoke to him today about it and he seems really keen. Result for dad I think, have ordered a few little boards to try out so hopefully my soldering skills are up to the task and he picks up this skill. I'll soon have him watching Big Clive with me :D

Saturday mornings aren't complete without a Big Clive video

That is pretty neat. It looks like it could be a lot of fun!

Sent you coffee, Great video presentation. Should be in all schools. Thanks.

Excellent video Clive! I must away and order one of these!

These work VERY well used on a three-cell Lithium battery pack. The full battery voltage is at the full drive voltage of the light. Then, as the battery runs down, the light will gradually dim, giving you a handy indication that your battery's running low. The LED cutoff is just above the safe minimum voltage of a 3-cell pack, so even if you set it and forget it, it shouldn't over-discharge. Only complication is that you may need some way to cool the panel at full power/full charge, until the battery runs down a little. Fortunately though, you have 12v right there if you wanted to connect a fan and heat sink system ....

That thing is huge! I probably need one to light my work bench now :)

Another cool-to-have LED on the shelf right there.

Good effort for the destruction test. Very informative top guy.

In awe at the size of this lad.

I bet you can make some amazing grow lights, Clive.

The first thing that went through my mind was bulkhead light. I'm pretty certain there are some cases roughly the right size for that. They would fit a small PSU too so you could feed them with say 36-48V reducing your feed current.

Warning: This video contains graphic scenes of LED array mutilation.

@condew6103

6 жыл бұрын

The mutilation does make one cringe, but very good information that the panel is 4 regions of LEDs all in parallel, and then the regions in series for about 12v. I like the redundancy such that one or two LEDs failing open should not appreciably affect light output or longevity. Failing short would probably blow the LED off the board with 5A thru the bad chip. The one aspect of discrete or surface mount panels that I don't like losing is repairability, but if the panel can suffer some failure and keep going, that helps a lot.

@vaio232

5 жыл бұрын

:(

@acmefixer1

4 жыл бұрын

Kind of a shame, ain't it!??!

For automotive applications this lamp would benefit from having a basic 2 transistor constant current regulator so the light output doesn't vary depending on whether or not the engine is running.

I use smaller 10w versions of these for Yard illumination using an AC-DC 60w 5amp power brick, they do very well for that. I also have 1 on my Tahoe as an extra Reverse/Illumination light connected to a cig lighter adapter.

nice video and Spectacular testing .. i love it

Looking forward to the 8.5" x 11" sized LED panel. :-) Light up the Night !

This looks like a really neat idea. Some vendors are now selling an impossibly small looking LED dimmer for this COB array that they say can handle up to 12A and deliver 244 watts(!) on 5-24V DC -- all for $2.75 delivered. Ooooookaaaaaay, lets see if it works. If it does the lamp should work well mounted on a homemade aluminum slide suspended underneath the top equipment shelf of my new electronics bench. Thanks, Clive!

LEDs on the cob..., run!

@SpydersByte

5 жыл бұрын

I'm glad that, with 21 likes and 1 comment, at least 23 people understood this reference :D

While i enjoy watching you taking things to bits, very often i buy those items just to check them out for myself. Now i have a large drawer full of assorted little toys.

This is the first thing you’ve shown off that I’m really tempted to buy! It’s a very nice looking panel, and I got a lot of cool ideas for this. Could you do some more testing? Would it handle 300W for at least 200 milliseconds? Maybe 100W for 400 milliseconds? With heat sink of course, I never go without a heatsink.

Love the cob lights. Got them in my car

This LED look insane :) as I saw it, I immediately thought what kind a project I can make with it! ;D

I got one 7" x 8.25" rated for 300 watts! WOW the light output! Needs a huge heatsink to run cool.

Nice. I put two RGBW panels on my sound bar for graphic equalizer, and the specs says needed 76 watt PSU for each panel of 8 x 32 LED's for 256 LEDs per panel. Well 76 watts blinds you. In reality, even hidden behind speaker cloth, in daylight, the panel is perfectly visible at 2 watts per panel. The sound bar is on my channel if you want to see it.

Thanks from Texas Clive

Thumbs up for your videos! I really enjoy watching them. I bought six smaller COB LED panels with each 50 watts to give my pepper plants a little boots of light for winter time. But they heat up quite fast and i got about 70°C after 7 minutes with one of them mounted to a passive cpu cooling unit. Could you make a video how to build a passive cooling unit for serveral of those in a row? I was thinking about some kind of aluminium plate.

12:35 - The current went up 10x when that section was shorted out. And that is with the reduced voltage... if it was being run with a higher voltage PS (not current regulated) the current would be very high and limited "by the wiring". Something to keep in mind when wiring it up.

Seems like a decent low profile light panel to build up from. Too bad the pads seem to be quite small.

I got 2 of those driverless led's at 100 watts each. Fantastic light, puts out a ton of heat though with a giant heatsink.

I might have to get one of these to look at. I recently picked up a 1000x usb microscope. It's good enough to see the bond wires on the COBs.

When you went to 5 amps, I had to instinctively squint. Which is utterly ridiculous; I'm still looking only at my monitor's dialed-down backlight...

@leyasep5919

4 жыл бұрын

that's true and it's a really fascinating psycho-visual behaviour : your brain "feels pain" from the contrast despite the lack of dangerous light. It makes you reconsider what pain is and how it works.

@thedillestpickle

4 жыл бұрын

I watch videos of people welding and it's the same thing. I've trained myself to know not to look at a welding arc and I instinctively look away.

@heyidiot

4 жыл бұрын

At five amps, Mr. Spock was freed of the parasite, but unfortunately, he is now quite blind.

YES! I have found my new front light for my ebike :D

There is a even higher power one on Ebay that I bought and it is rated at 200w and it is in the form of a large circle measuring about 160mm

"excuse me rambling about, i'm just experimenting" umm... that's one reason why I watch you :D

12 rows by 20 is 240 chips. Must have meant 28 across That's a huge COB. Great video!

@ArlenMoulton2

3 жыл бұрын

He said 28

@VanFlicke

3 жыл бұрын

I had to listen three times and still didn’t hear 28. Shrug. No big deal

@TheComputec

3 жыл бұрын

@@VanFlicke I think he said 20 to begin with but in later comments, after he murdered the first LED he did say 28.

I heard that someone said, let there be light.. Was his first name Clive, too? Keep up the good work. ..

I think I'm going to buy one right now.

Nice 👍 12 V solar array, to battery, to lighting, or a regulated 12 V supply would be BOSSSS

Very very neat! I wonder if I could find some "warm white" ones with known specs... (emission spectrum & CCT). I think you shouldn't underestimate the accumulated heat though, especially if not directly heat-sinked (or actively air-cooled). I don't think over 1A is realistic for 24/7 usage, if you care about its longevity. Then again, this thing is quite cheap for what it is.

That panel is indeed massive. Clive do you have any way of measuring the Color Rendering Index (CRI) of this thing?

How the hell this channel wasn't in my life before?!?

Sit back, and enjoy..unfortunately kids, the only thing burnt today is Clives image sensor in his camera.

@maicod

6 жыл бұрын

or his eyes :(

very interesting presentation

Have two of these, one turned up with a single bad LED another had a chunk out of it which was a shame but got my money back so hey oh shall use them for some new lights i've planned still.

As a public service you should expose more of the wiring on the board and discover if it's safe to drill holes anywhere. Mounting these to a proper heatsink with good/firm pressure will be hard since they have no holes in middle. If it is safe to drill holes in a few locations inbetween the LEDs it would help.

I really appreciate you sacrificing the panel in the pursuit of knowledge. Just a shame the manufacturers don't share that info on a schematics document. After all they can hardly keep it a secret given the price !! If this was needed for a critical use, such as an emergency illuminated information display it is handy to know how much illumination you lose if one led were to die. Maybe they just don't want to spend the money getting the design info translated into English? or they simply don't care what happens to them once they leave the sweatshop... erm I mean factory !

I bought four of these a while ago. Thinking of making a work light.

Very nice. Thanks BC.

I'm going to install some of these LED light panels in my 1986-vintage motorhome to replace the 12V bulb-type fixtures that are in there now. I will be living in the motorhome full-time (in a static position) starting later today (hopefully!). A few years ago, I installed one in a shipping container house that runs from a PV array and a 200AH 12V AGM battery. I have been VERY impressed by it. It's cheap, and has very "soft" output because of the large area. The motorhome has ONLY 12VDC lighting, so unless I plug in a bunch of extension cords and put up 120VAC lighting, 12VDC is all I can do. Given that I'll eventually be off-grid with the motorhome, 12VDC is actually an advantage for me, as I can run all my lights directly from the PV-charged battery in the RV, without needing to have an inverter on when only lighting is needed. These panels can be easily dimmed, too, so they use just a tiny amount of power to put out plenty of light for most situations, but crank up the knob and they get HELLA bright!

@bigclivedotcom

2 жыл бұрын

There are loads of choices for 12V lighting these days. You can also convert just about any light to 12V.

Woohoo. Big LED light!

Nice find!

Hello big Clive. Love your videos and in this one you mentioned that you would not run 70 Watts through this panel. I've just ordered one to play around with I was wondering what controller you might suggest 2 power one or more of these? What you need one controller per panel or could you get one controller to Power four or five of these. I am looking to keep temperatures down and figured this unit could help in that regard. Any help gratefully received. Regards

Your favourite 100w LEDs are being sold in COB form now, and they're perfectly even I got some for my garage, they haven't had any issues with dying rows or uneven leds after running them at 90w+ a day

@urugulu1656

6 жыл бұрын

m.ebay.de/itm/COB-LED-Panel-Lampe-Spotlicht-10W-30W-50W-70W-100W-120x36-220X120-200x10mm-/263642714031?nav=SEARCH

@urugulu1656

6 жыл бұрын

they are intrigingly cheap... less then 6 euros...

@MegaMetinMetin

6 жыл бұрын

Luke Den Hartog i find with leds they last forever but its the converter thats dies

@stinkycheese804

6 жыл бұрын

A "WHOLE" day? I've ran lots of 10W to 100W COB that lasted 100 hours before dies started dying... You're much better off running something like this at half power and that on a massive heatsink, or closer to 1/10th power if you prefer little to nothing heatsinking it.

@cnerde

6 жыл бұрын

Meaning 90+w every day all day... derp.

So glad you didn't 'TIG weld these', last time you did it was like watching someone beat up R2D2.

Imagine going back in time late 1970's and you forget this board in you pocket.

@dirtrusty7228

5 жыл бұрын

Instant butterfly effect. WWIII, dogs and cats living together, mass hysteria!

Looks like it would make a good under-hood light. Need a protective lens and a resistor though. Using 16 ga. wire with a fuse from the battery would be best.. using a switch like a door switch (button switch that's closed with button out).

I think my welding table is about to get some new seriously bright lighting!

Thats a great pannel. How small could a regulator be built for this? Ive put together a rectifier for my wr450 lighting to be able to use LEDs. The single large pannel would make a very interesting replacement for the entire original headlight.

The colour temperature of these are around 6000K+ so they make good SAD lights.

I ordered eight of these at the beginning of the month, and they arrived today (here in Texastan). Two of the panels (the ones at the top of the stack) were all 100% uniform tested at 9.5V drawing 2 mA. Two had severe non-uniformity, and interestingly both tested drawing 3 mA. Four had mild to moderate non-uniformity, and all but one tested at 3 mA (the other was at 2 mA). one of the severely non-uniform ones has deep scrapes/scratches in the rear aluminum, the other severely non-uniform one had no issues with the backside. The ones I bought were wrapped in very thin foam sheets, and shoved in a plastic bag and mailed in the bag from China. I'm not sure if this is how they are all being shipped (I would hope not), but it is something that everyone might want to inquire about before purchasing. There was not even bubble wrap. My numbers should be accurate, my Fluke 117 is NIST tracable. I'm going to ask for money 3/4ths of my money back from the seller, or replacements that are 100% uniform. I'll update this with the results of that. Oh, in an interesting coincidence, mine came from "valuedresshop" on ebay.

@bigclivedotcom

6 жыл бұрын

All mine came in plain plastic bags with minimal packing. They seem pretty rugged though.

Hey Clive. Have you seen the range of tools from Aldi? They have several things like £20 soldering stations and £15 rotary tools among other smaller things such as £3 helping hands and mini vices. Might be an interesting range of products for review and testing.

@Beany2007FTW

6 жыл бұрын

Konnor Bowen aye, I picked up one of the soldering stations. I'm sure the temperature is way out on then, but they do definitely adjust their output and the kit itself is fairly clean and straightforward.

@Jkirk3279

5 жыл бұрын

Aldi America must not carry that stuff.

I’d really love some of there but in UV. Would work perfect for a small exposure box.

hot clothing iron is vice of knowledge -great tip!

Seems like it could be part of a pretty nice portable "Trouble Light". Somehow regulate some 18650s with an on off switch?

Only Big Clive Exes can dislike his videos.

Yep got to get me one of those.

Neat ... Looks like a lot of bang for yer buck (magic smoke included) . Putting one of those in a cheapo rip-off led work light (or even an old quartz halogen type) should make a dandy trouble light .

@volvo09

6 жыл бұрын

That would be a good way of making a cheap light quite effective. Driven at low power it would probably put out more light than the fixture already had, and stay cool. Still wonder if a real bridgelux or cree cob would be better... and the price is pretty similar. It is amazing how much more light / watt you get out of a "real" led, making you wonder why these exist. These unbranded ones are neat to play around with (i do have some) but they are truly super low end as far as light output goes and need to be cheap... factoring that into a price of more than $10 they are actually a ripoff when cobs that output like double the light for a few bucks more exist, and will actually last.

I think this would be the perfect thing for people that are converting vans into campers. A nice warm white light that would not use that much power and keep the heat down on rather hot evenings.

6 жыл бұрын

Connecting this directly to the potential charging voltage if 14.4V would be very bad though.

I wish PAR meters weren't so expensive. I would like to get a closer look at the spectrum coverage of that COB. It seems like a fun COB to wire up a ton of for an indoor grow light. Nice to see another post from ya, Clive.

@youtubekillerxxl3878

6 жыл бұрын

Moose 8

@rub3nelmillor

4 жыл бұрын

Might be late, but look for MIGRO youtube chanel. He did a good analysis on this one. Cheers

Bought this based on this Video great buy!

This is amazing, thanks for making this video. If I were to wire it directly to a 12v car battery, what would you recommend for a voltage regulator?

@bigclivedotcom

6 жыл бұрын

Simplest thing would be a resistor. By the look of what's being sold online some seem to rely on cable resistance to limit the current.

@thedillestpickle

4 жыл бұрын

@@bigclivedotcom Since you were attempting to destroy it anyways... It would have been interesting to see what unlimiting the current would have done. Does it have enough resistance to limit the current on it's own? I am looking at getting one of these for a solar application where energy will be limited. I don't want to use just a resistor which could use up half the power itself, so I will look further into how to limit the current.

@thedillestpickle

4 жыл бұрын

Mind you without spending more than 10 dollars if possible

this would make a very nice arm light for bench work or the mother of all flashlights

@mattburrows2615

6 жыл бұрын

Anders Sorenson this would make a nice work/flood light but a Cree XHP70.2 would make a more efficient concentrated beam for a 4290 lumen flashlight and only use 30w.

This style of troubleshooting is just what surgeons do!

Where do you suppose you might be able to get a heat sink for something this size? If I could figure out a lens and a way to keep it from overheating, this really could be a great little fog light.

Sweet i have the same measuring tape Wilkos 0.99P tape

I miss those 300W halogen torchiere lamps - apart from the slight fire hazard and the high power consumption. I’m tempted to get a COB array like this one, with a power supply and heat sink, and try for the same effect at around 50W of power, shining a lot of light on the ceiling. (A lot of eBay sellers seem to sell all three types of component, but don’t seem to offer an easy way to order all three at once.)

@JGnLAU8OAWF6

6 жыл бұрын

You could use 150W metal halide lamps too...

Great videos Clive. Can I ask what company you got this big cob from and what website ? Thanks bud for all your great videos

@bigclivedotcom

2 жыл бұрын

It was from eBay.

@johnhutchinson5398

2 жыл бұрын

I looked on eBay after watching your video and all I could find was the small ones. During my search I seen some cobs that was full spectrum and should be able to use them for house plants or in a grow room. That could be a great video on checking these type of cobs out to see how they really put out and work as grow lights.

That is a big ass panel.

I would really like to see this panel on a thermal camera especially at higher loads and enough time to build temperature up.

arse just bought a load of the other panels and this one would be far better for my application :)

Thumbs up for the wilful destruction... errr... testing! ;-)

Ohhhhh that's is ferocious. ..

would be cool to make a large array of these for some growing lights.

I would laugh loud if I can mounted those led on a tablet, dead tablet perhaps and rigged it to flash brightly if the power button pressed