ASDA 12W (100W) LED filament lamp teardown. (with schematic)
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- Опубліковано 24 лип 2019
- I got a couple of these from ASDA (UK Walmart) because I was interested to see how they managed to fit a fairly high power supply into the small base.
I'm travelling with work at the moment, so this video is slight less thorough than normal and will sound and look different.
The lamp uses six long filaments wired as three parallel pairs in series. The light output is very impressive, although the heat generated by the LED filaments is uncomfortably high. I prefer to use a cluster of smaller lamps for higher intensity, but this lamp is clearly aimed at replacing a classic 100W lamp.
The circuitry is based around a mysterious buck converter chip that may have the name of the inventor on it.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
This also keeps the channel independent of UA-cam's advertising algorithms allowing it to be a bit more dangerous and naughty. - Наука та технологія
I've got several bulbs like that, that give a nice, warm vintage lamp glow. I've got them in every lamp in my bedroom because they're very relaxing and nice to read by.
Alpha Machina Yes, I love them. They are very warm and cozy, also use a minimum of electricity which is very interesting since it gives the same feeling as an incandescent light. Greetings from Brazil.
I bought the same bulbs some time ago and wondered how it worked. Thank you very much for this trip to the heart of electronics that surrounds us.
Strangely satisfying watching the little pieces of metal being peeled off...! And I think I miss the usual work bench... I like how it bears the scars of past projects.
I literally watch your videos bc your voice is so god damn relaxing
I feel the same way about Clive's voice as I did Randy Savage, the "Professional" Wrestler from the '90s in USA. This seems silly, but I think Randy missed his calling of creating audio books. Would LOVE Clive and Randy reading things to me! LOL
I do that too ..
YOU'RE GAY NOW. SERIOUSLY, YOU ALSO LIKE THE WAY CLIVE SMELLS.
So true - Me too - He needs to be doing Voice over work or his own radio show -
....that's the second reason I watch, 1st is because I'm an electronics tech and Clive keeps me abreast on these type of technologies.
I got a few of these from Maplin's closing down sale, and had several in use for about 18 months now and they are all still good. They have a fairly warm white light with no detectable flicker.
Excellent, hopefully that bodes well for me, just bought a bunch of these. Most likely all the cheapest Chinese goodness comes out of the same factory(s). Very happy so far.
Hope you have another satisfying year with the Tatoo
This design is so much better than the ones with the ballast integrated in the center of the bulb, this design allows for heat to be dissipated into the screw base and into the home wiring
Wow that zoom is as good as my own eyes! I was impressed with that S60 when it first came out.
The quality of the S61 zoom is soooooo good Clive, hopefully with a software update it will alleviate the slight jumping issue.
That zoom is worth putting up with the dropped frames.
why is it i always end op on one of your videos whenever i search for something a bit uncommon.. love you clive!
I didn't even need one of these, but after a Big Clive review, I went to ASDA and bought one. I was not disappointed. These things are big in volume though - only of use in large lamps with ample room etc.
Good lights, good, thanks for the great light video Clive.
I don't mind the occasional glitch. I really like the close-up details!
Thanks.
That chip was designed in Newcastle by a guy called Wey Ayman. Seems like he's a very well known person since everybody there seems to know his name.
Wonder if he runs on Diesel?
Haha :)
Lloyd: Very funny Wey Ayman lol lol.
Help, not getting it (native Dutch speaker) ...
@@MyTubeSVp Newcastle upon Tyne and surrounding region dialect - try ua-cam.com/video/r09urAHaVwA/v-deo.html
Morrison also has the vintage 100w, im sure they all sourced from the same manufacturer
Thanks for mentioning OpenCamera app - I'd notice seen that before and its great!
Could the 470r combine with the 1uf to be a compensation network as well as the 1uf being some sort of bootstrap supply for the chip?
Great video big clive
I have similar lamps (walmart brand) in my house they are the smaller base decorative lamps 7watts =< 40watts on the pkg, the og lamps were 21 watt incandescent. They are bright they do get hot. I've had them for 6 months now and usually unscrew 3 out of the 4 unless I'm working on something. Cheers still moving better get at it, I have a BigClive Lightup Coaster to assemble when I'm done moving. Cheers. Safe travels.
Hope the move goes smoothly.
Raymond Mucklow, you commented this several days before it was uploaded.
@@martinrocket1436 patreon, you toss a couple bucks a month to help content creators make videos.
@@martinrocket1436 good eye tho
Heard they fill these with He to transport the heat out quickly but don't know for sure. Also think the phosphor can delaminate from the LEDs if it over heats too much. Sound like an experiment. :-)
I was going to buy some for my pendant light, but long term reviews say the drop in brightness is pretty significant. Makes sense since heatsinking is going to be necessary at those wattage, and non-existent on those filament LEDs.
Interesting as always
Thanks for sharing 👍😀
The 60w versions work very well and don't get hot, which Is very nice.
Does having a boost converter and a small filter capacitor give it a better power factor, than a buck type? Have to try one on the hopi when you get back from work.
Do you think the power factor is any better due to the booster?
Let's just call it Danger Glitter.
SPACE COMMA
Danger is my middle name.
I seem to remember the voltage over these LED COBs was around 70 or 75V... not sure these long ones are similar but three sets in series would need around 210 - 225V, wouldn't they? That seems a nice level to avoid too much complicated voltage conversion, though I guess being DC you'd have to convert up from the RMS produced by the simple rectification. What I really want to know is how good these are for flicker. Out of all the different brands I bought off AliExpress, there was only one set that produced steady light, and by the time I went back to try to buy them again the shop had disappeared.
ill have to have a look see if they do a bayonet fitting and give one a try see if they are brighter than what i got already, i find the replacement wattage they state to usually be a bit laackluster on led lamps, probably not helped by the fact i like the warmer colours as well and they usually have a plastic diffuser cap rather than glass. i find it a bit daft that often these lamps only come in eddison screw fittings when ive never lived in a house that didnt have bayonet fittings in practically every room
wow new table .....not bad Mr. Clive
Isn't this a boost converter? About the 2mH inductor, could that be an additional way to further smooth the DC, supporting the 4.7u cap.
The RC network with the 1u cap is for the internal oscillator.
Edit: Now that i think about it, that's a pretty heavy low impedance RC network for an oscillator? Hmmm.
You would rarely have an RC oscillator with such component selection i.e. very high C and very low R. It wouldn't make sense unless it had some cunning dual purpose.
Clive, did you add the glitch at the exact moment that you said glitch, or was that just a good coincidence?
Were you working the Proclaimers gigs Clive? I did wonder if you were there when I was seeing them Saturday.
That's done with Castle Concerts. We used to do their house lighting and power on the old stands, but now we just share facilities. They're moving out as we move in.
Hi Susan. I was a bit bored so I dismantled my Corby Trouser Press. I can't put it back together again.Will that show up on my bill?
A-haaa :)
Was 1:07 intentional? Funny that there is a slight glitch in the video just as you're talking about it.
It happens whenever there is a lot of motion in the frame, like when he moves his hand. To some extent it probably was since that's when its most noticeable. Its probably due to the extra processing power since static parts of the image are not updated as much, only the moving parts of the image as part of the compression algorithm.
FWIW my old original HD Samsung Camcorder does it, too, when filming in hot weather after a while. Presumably because the processor slows down to protect itself from overheating.
He said he's filming with cat's ass.
It's the 60fps setting. It messes with UA-cam also at least on a Galaxy phone
“Is that a little transformer inside, or are you just happy to see me?”
It's a FULL BRIDGE!
Lamps like this last the longest, when used base down, in a table lamp, where the bulb gets good ventilation. Putting them in a pennant fixture, base up, with a glass globe over them allows them to get hot enough, that they don't last as long as an ordinary incandescent bulb. The best use of an LED lamp like this, is in bedrooms and bathrooms, where they're switched on and off frequently. LED lamps hold up to on/off cycling better than anything on the market.
I could do with those strips of LEDs for my RC truck. They'd make a great glow for underneath.
@@johncoops6897
Yes I did mean that, my smelling isn't that good. And I forgot about the voltage.
@@Slikx666 Those LED filament strips are also very fragile and will snap under light pressure. I'd get the LEDs mounted on aluminum strips or the flexible tape kind.
@@JohnAudioTech Yes I've had some break before just by soldering them - turns out LED-filaments potted in a glass tube + thermal expansion is no good...
I may have asked before, but what program do you edit with?
Vidtrim pro.
I'd be curious what the voltage across the LED array is. Note that Vf of the LED string must be higher than 339 Volts (sqrt(2)*240) or the LEDs are on regardless of the regulator.
Is that the case? >100 LEDs in series.
Normal led filaments are half the length, spec as 1W, and have twenty chips in series. I think it’s not unreasonable for these double length, 2Wspec filaments to have 40 chips. If that’s the case, the bulb in total has 120 chips in series (and two of those strings in parallel). Which would make it 360-390 volts at about 30-40 mA, which does actually work out to 12W ish.
4:45 Could you please make a short update video when you are back home showing the power and voltage? (given that is somehow possible with this or another one of these)
Quite nice to see you tearing down a well designed LED light power supply for a change. I don't know about the whole thing getting so hot. But I do like the power supply, it's nice and compact and I presume fairly efficient and of course flicker free. I wonder how the power factor is though given the resonable large capacitance on input side. I was wondering if the inductor is also meant to provide some power factor correction?
That's ok Clive, I'm watching this on an S60!
Second person watching on an S60!👌
@@WouterWeggelaar ha they are a good phone aren't they?!
I love mine, but whoever designed the speaker grille sticker / gauze thing.... that's the one weak point I hate!
@@WouterWeggelaar Yep mine fell off. I can't complain though, this phone fell 5 floors down a lift shaft, bounced off a steel beam and still working fine!!
"Cutters for nibbling into the metal" and the desk when you slipped
Not to mention nibbling into flesh, which luckily didn't happen THIS time!
@@sootikins Also quite good for nibbling fingernails._
have you ever had any signs of gasses inside the LED bulbs? they say it helps to transfer the heat to the glass faster. maybe thats the reason it turns so hot.
Helium fill is common I think.
I was sad that the X-Ray was not required in this video.
Interesting we are now at the point where 240 Volts is _insufficient_ to operate LED lamps... who would have thought the day would come when (European) line voltage would need to be stepped up for LEDs.
Would an led bulb this size be hotter or cooler than an equivalent fluorescent??
Clive, have you ever found out what gas they put in the lamp in order to facilitate thermal exchange between the filaments and the ambient air?
@@johncoops6897 There is a possibility to aid heat dissipation from a bulb like that if it is filled with a gas with high thermal conductivity. Unfortunately it means the gas in question has to be one with a small-sized molecule. So the only real candidates are Hydrogen or Helium. Usage of either of them would increase the cost quite a bit. Hydrogen would make the factory liable to explode, so a lot of safety features had to be added. It is also chemically active at high temperatures thereby reducing the choice of materials that can be used. Helium is expensive. And because of the small molecule both of these gases are hard to contain within the bulb, they will leak through many materials, more so due to the bulb being subjected to continuous thermal contraction-expansion. So, you are probably right, the "working gas" inside is the Chinese air.
@@johncoops6897 I am not saying it is a solution, my point was it can aid heat dissipation somewhat. The existing methods of heat removal must still be present. Now, to optimise this assistance let us assume that we have a bulb filled with a high heat-conductivity gas. Let us also assume that the glass is kind of special, that is has high heat conductivity itself (I know it is probably not invented yet) so it conducts heat well from inside to outside. And if we make the outside of the bulb ribbed that will increase the radiation surface area. So the only problem left to resolve is how to make a transparent material (glass) to radiate efficiently :o) But.... if you can do all that to my mind it is a help.
@@johncoops6897 Yes I too has always thought along those lines, increase efficacy, reduce heat. Then I stumbled on this article: www.edn.com/design/led/4422381/True-or-false--High-power-LEDs-don-t-generate-IR-heat-in-the-forward-direction-like-a-filament-lamp Have a read, including the comments. It is a fascinating stuff. Staging several experiments author discovered that powerful LEDs are able to generate heat WELL IN EXCESS of their junction temperatures. Since as you say LED don't emit IR the conclusion is that the heat is produced by the visible radiation, the light itself. It is ignored in the incandescent bulbs due to it being insignificant compared with the IR heat. But in LEDs it becomes a factor. It looks then that increasing efficacy of the LED will produce more powerful light and despite less junction heat the problem of radiated heat dissipation remains. Anyways, have a read, what do you think in the light of this (pun intended).
A few years back, a taiwanese manufacturer brought to the market water filled LED bulbs (leaving a bubble of air to enable water expansion with heat). Obviously, they had little success. I suspect the weight was a problem. And there might have been corrosion problems...
I doubt they could make one of these in the Canadian/US 120v voltage and have it fit in the section that screwed into the lamp.
Are there any dimmable versions of these retro LED lamps?
Yes there are. They are a bit more expensive than the non dimmable ones, and not all dimmer circuits will work well or even at all with them as they draw significantly less power than regular incandescent light bulbs. Some dimmers can't fully regulate these topping out at something like 90% and bottoming out at perhaps 60%. Another possible failure is that the dimmer is unable to turn the light off, leaving the bulb glowing even when the knob is turned all the way down.
@@blahorgaslisk7763 Thanks. I have normal dimmable LED lamps and they work fine using an LED specific dimmer, but not seen dimmable versions of this style.
@@ferrumignis I started writing that answer like i was on autopilot, and then it struck me you might mean that particular style, and I had to look it up to be sure I wasn't just blowing smoke. The rest of it was just to make the info more complete in case someone reading this really wonders. Thing is I've often seen both dimmable and non dimmable LED lamps sold side by side on the store shelves, but never any warning that even the dimmable ones might not work 100% with all makes and models of old dimmers out there.
I wonder about wattage rated lamp shades with hot led bulbs ?
When will these go on aliexpress for a reasonable price?
You should probably get one of those 35mm slide size diffraction gratings and a bit of solar viewing film. Both are great for looking at LEDs
I have one of those slides. But not here.
Well, now i'm eager to know if the claimed 12W are real or chinese. I see the led bars are longer than the ones used in 4-8W lamps but are they 2W each?
Can I have full details of the 110 VDc lamp & it's availabllty
Would these be dimmable?
100w equivalent is it 12w or 15w led bulbs or can it be both if so which one is better?
@@johncoops6897 Thanks for the brilliant reply.
They gonna be vacuuming that room and wonder what you were doing in there and why there are bits of metal plastic etc. everywhere.
what is the output voltage that goes across the LED filament? thanks!
Not sure, but it's likely to be quite high.
Looks like a good regulator design, please tell us the PF when you get back to your HOPI :)
solder a wire to the center conector, and strip about 3 inches of wire, wrap it aroung the base, twist it, and use a length or electrical tape to make sure that it stays in place.. i did it when i needed a power indicator for RF.
I've got some OSRAM 40W equivalent ones in my bathroom light, which has the bulbs exposed, just above the mirror. Perhaps a little too yellow, I wish they'd also sell neutral white instead of just warm or cool. BTW, they're in the edison screw base, G15 size. (Note: here, the "G" means "Globe" not the Bi-pin like type you see on some halogens.)
Did anyone else feel really nervous during the 'nibbling' section?
just a little lol
I was waiting for a bulb smash disassembly.
Clive is very good at keeping us on the edge of our seats, a real master of suspense he is!
I took apart a Dollar Tree led bulb and found that it had a giant resistor, a smoothing cap, diode and an 8 pin chip soldered the same way this one was, currently testing another one for life span but boy I would not put them in an enclosure, they get hotter than hell at the base.
I am somewhat surprised at the largish filter capacitor before the booster. The booster should be OK with fair amount of ripple on its input.
Now @electronupdate should decap the silicon!
All the filament LED bulbs that I have seem to overheat and burn out prematurely. I run Philips candelabra bulbs 24/7/365 for going on 2 years now, no flicker or reduction in luminosity compared to the filament bulbs. I hope the technology will improve in time because filaments look more attractive.
I worked in a cafe that used these filament style LED. Over time the glass became stained yellow. Is this common?
Maybe the glass was really plastic.
I’d calculate these long filaments (2W each) as two normal filaments in series - so 40 leds per filament. So 120 leds or 360 ish volts over the bulb.
I would think that a Dremel or Proxxon tool with a cut off wheel would be an easier way to get that base off. Of course the Knipex are less trouble to set up.
Great stuff Thanks 👌
So much "man glitter" from cutting that base open! AvE would be proud.
Love closed captions with "micro farts".
Why would I skip ahead?
I wonder if instead of the glass it was plastic, with some holes through it so heat could cause some convection would be better for those LED's?
Even as glass they could add ventilation holes if they really wanted. However, I believe the real purpose behind this style bulb is to actually reuse the glass bulb production equipment used in incandescent bulb production by creating a secondary market for glass bulbs so as to keep the price down on traditional glass “specialty” bulbs (such as heavy duty filament, appliance lights, and halogen) since we don’t have anywhere near the production level of glass incandescent bulbs as we once did given the shift to LED and CFL bulbs over the past decade (by and large a move for the better in terms of energy and environment). If that is the case, then the fact that they are using the same glass bulb envelope as a traditional incandescent bulb is the whole idea behind their existence on the market and moving to a plastic envelope would be contrary to that intention. Perhaps what we really need are Edison (threaded) replacement sockets with integral heatsink fins so that we can better dissipate heat through the socket assembly, then we could simply retrofit many old lamps and fixtures with sockets better engineered to extend the life of LED and CFL ballasts while still preserving the utilitarian nature of easy user-serviceable bulb swaps that our older style fixtures permit.
@@ethanpoole3443 I also suspect safety, a hole or a few and uninsulated wires is not the combo I would love as someone will poke stuff in there
I just watched a video about the Cat S61 and they said that the camera recalibrates itself every so often and, "if you see the image freeze, that is why"
That's the thermal camera. It drops a shutter in to get an even field of calibration.
What i like alot : No stupid intro with each video.
How do you stop led downlights from glowing when off (ghosting) it is driving me crazy... help
You can connect a high value resistor (or several in series, wrapped in heatshrink, to get a high enough voltage rating) across L, N (e.g. in the back of the switch). If the cables are accessible, move the switched L wire further from any neighbouring cables.
@@Tim_Small thanks... will give anything a try👍
Why is it a buck converter? It boosts the voltage to more than 330 V. It´s the first LED lamp i´ve ever seen that uses a higher voltage than mains.
I think the higher voltage is because the LEDs are in series to push the current through.
"Maître d'hôtel!! There is a huge burn mark on the desk in my room! The previous occupant wouldn't happen to have been named Clive, was he? Yes!! I am refering to BigCliveDotCom.....it was? OK, that room will be fine." :-) "Stacey!! I am staying in the same room Big Clive stayed in! ("Stacey" replied something about the Beatles). Ya, I know!"
Late to this... Clive describes the converter as "buck" a few times but... isn't that a classic "boost" topology?
Funny thing is I am also travelling for work while watching this. Maybe I should buy a US light bulb & do a teardown
I bet that it's not as bright-white as a tungsten 100W bulb though, I remember the first time I used one of those, very bright white light compared to the 40s and 60s I had used previously... :P
Video published 4 hours ago. Some comments from 4 and 5 DAYS ago.
Have you been time traveling again Clive?
would have been good if you had strip the yellow covering so we can see what the LED filament looks like underneath..
I think that is what most people wanted to see since most are familiar with the traditional LED lights on lightstrip and torches
I had no idea there were so many tiny Parts like that that made of a light bulb.
not every light bulb. this is a special form of a LED lamp, those need to transform the electricity thats coming out of the socket because LEDs dont work with it and than its also too much power, so it needs to regulate it down first. other parts smoothen the power so it wont flicker and all that stuff that wasnt needed with old "normal" light bulbs. but at least they dont get so hot. : )
Only for LEDs and Fluoros. The old tungsten ones didn't need any circuitry.
Now ya do lol 😁 there's plenty of led bulbs out there to take apart when they fail due to overheating lol
Sir if required can I please use your any short clips in my long videos to match with certain lyrics.
Where I will use your maximum clips in a specific video shall share your link too.Can I please use do reply yes or no even if no just say no. Thanks.
“Does that say A.Y.M.A.N.? Never heard of it!”... Och ay man, it must be a Scottish chip!
Edinbourgh for Assembly festival?
Royal Edinburgh military tattoo.
Will you be doing a meet up in Edinburgh?
Yes I will. I've not announced it yet.
Tnx
Welcome to Edinburgh Clive
Pretty countryside in Edinburgh.
Yeah, there's not many cities can boast an inner-city mountain.
Gut 👍🤗
Take a day off Clive! Save the bulbs 😂
I'll bet it still generates RF like a Banshee !! It would be Great if some independent ie; (not corrupt) individual or group, would take Spec analyzer or VNA to see how much RF(amplitude) and what frequencies it generated ! Hint, Hint !!
It's probably rough in the LF to HF (.1-30mhz) range. Now day's people only complain if it screws up their smart-phone, blue tooth or wi-fi !!
I wonder how much of the old Edison bulb manufacturing and glassblowing equipment could still be used for these. The moment you realize scrapping your multi-million dollar factory quipment to make those new fangled curly Q CFLs was a mistake.
I'd guess a lot of the older machines are back in business with minimal adaptation for the new era of glass globe LED filament lamps.
Does anyone happen to know whether filament LED bulbs produce a different kind of light to normal LED bulbs? I've got a 15W (100W equivalent), 1521 lumen, warm white bulb from Wilko (product number 0437675) and it produces a very similar light to a CFL. It's perhaps a little bit more on the yellow side than a CFL, but barely noticeable. Apart from the obvious difference visually, when staring at the bulb, is there any difference between the character of the light from an LED filament bulb? They often appear to be more expensive, so I'd like to know if that cost actually makes a difference. Many thanks! :)
It all depends on the phosphor blend and quality.
Generally though, is there a difference in the way the light is delivered/projected, or are they pretty similar?
As the LEDs look like they are close to overheating the bulb needs placing in the "magic box" and tapping with the "magic wand". Replace the envelope with a clear plastic hamster ball so the bulb with its ventilated envelope should run cooler and last longer.
Seems like your camera records slices of video and stitches them together under whichever format you're using. A lot of cameras do this but some are better at hiding that jump than others.
Where is voltage, current, power factor?