Dimmable LED Lightbulb - INSANE Schematic!

  Рет қаралды 88,675

DiodeGoneWild

7 жыл бұрын

Teardown of a dimmable 5.5W 470lm LED light bulb from Livarno Lux. Rated 220-240V 50Hz. It is completely filled with a resin. Disassembly was a bit tricky. The circuit is a "little bit" overcomplicated. It has a double sided board with SMD components on both sides, even under the THT components. Drawing a schematic turned into insanity. It has BP3216 chip. The supply seemed to be a buck regulator, but actually it is a switching voltage inverter. This kind of inverter is capable of both step up and step down operation. There's no big capacitor at the output of the bridge rectifier, so that it can work with a triac regulation. The output current of the inverter is proportional to the average input voltage. There are 14 LED packages - Two chains of 7. Each package contains 2 LED chips. Total LED voltage is 40.7V. The LEDs are on an aluminium substrate PCB and a heat sink. This makes contact with another heat sink in the plastic body. This one cost 2.50 USD and comes from a local supermarket.
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Пікірлер: 174
@Prometheus1111
@Prometheus1111 6 жыл бұрын
This guy can do more with an exacto knife and a screwdriver than most people can do with an entire hardware store.
@BigEightiesNewWave
@BigEightiesNewWave 4 жыл бұрын
MacGyver
@ClarkKent-ls6ic
@ClarkKent-ls6ic 7 жыл бұрын
"this is diode gone wild & also i have also gone wild while drawing this schematic"- i almost died laughing !! 😂😂
@arbbairagi
@arbbairagi 5 жыл бұрын
Me too man😂😂
@synx7874
@synx7874 2 жыл бұрын
" i hope for another kind of circuit". Careful what u wish for 😜😜. 10/10
@MixedGears
@MixedGears 5 жыл бұрын
OMG. That schematic They really took it seriously for a lamp
@mrjohhhnnnyyy5797
@mrjohhhnnnyyy5797 7 жыл бұрын
This arrangement is called buck-boost, the predecessor of a well-known isolated flyback converter.
@mcgaggero
@mcgaggero 6 жыл бұрын
I really, really love your teardowns!! Your hard work is very appreciative!
@petehiggins33
@petehiggins33 5 жыл бұрын
This is a current contolled buck regulator. The internal high voltage switch is between pins 5/6 and 7/8. The current is sensed by the 2 ohm resistor connected between pin 8 and pin 1. The average input voltage is sensed by the network in the bottom left of the diagram (WTF?) and fed (under the chip) to pin 2. The chip regulates the output current to be proportional to the voltage on pin 2. So when used with a triac type dimmer the output current and hence brightness is controlled by the dimmer.
@Conservator.
@Conservator. 5 жыл бұрын
number 33 Thank you for explaining! Wish I could give your comment more than just one 👍;) Just curious: where did you get your knowledge (and about these lamps)?
@petehiggins33
@petehiggins33 5 жыл бұрын
@@Conservator. I designed high reliability switch mode power supplies in the aerospace industry (mostly satellites) until I retired 10 years ago. That couldn't be more different from the mass produced, low cost electronics that DiodeGoneWild shows us although the basic principles are of course the same. We used to pay perhaps $100 for one Hi-Rel, Rad Hard transistor. My only knowlege of the insides of cheap modern electronics comes from the likes of DiodeGoneWild and BigClive.com.
@Conservator.
@Conservator. 5 жыл бұрын
number 33 Wow, Yes I can imagine that you’d use quite different design principles for satellite equipment than for a Lidl light bulb. And with your explanation (and the video) I conclude that these bulbs aren’t even that bad at all. Thank again!
@Conservator.
@Conservator. 5 жыл бұрын
number 33 Hi again, I watched quite a few video’s on smps over the weekend and the more I watch the more I’m aware of what I don’t know. I find it fascinating however how complex this subject gets once you get to the nitty gritty details. Dr Ray Ridley mentioned reliability as nr1 concern when designing this circuits. He also mentioned that it takes about 10 years to become a good smps designer. ‘Yeah right…’, where my initial thoughts. Now I think ‘Yeah right!’. Designing for satellites must be at the pinnacle of this area. Reliability, low emr, efficiency, low weight and certainly a lot more (though cost was probably less of an issue). By now I understand that the lidl circuit must have been completely trivial for you. If you like you can email me at my full name at gmail. But if you do I might bother you with a question about electronics ;-)
@RODALCO2007
@RODALCO2007 9 ай бұрын
The excavation goes on. Priceless! What a complicated circuit for a led lamp.
@dr.nadhimrasool2959
@dr.nadhimrasool2959 6 жыл бұрын
My friend you are very patient and professional.
@abdultairu
@abdultairu 6 жыл бұрын
I admire your persistence and perseverance. Above all you do this with tons of humor. I laughed my butts off watching this one. I am like you've met your match! But guess what you figured it out as usual.
@carlocastelli7511
@carlocastelli7511 5 жыл бұрын
Excellent analysis. Thank's for your job.
@channelsixtysix066
@channelsixtysix066 2 жыл бұрын
Binge watching. Enjoying your videos. 👍
@frankie9259
@frankie9259 6 жыл бұрын
Love your expressions, hysterical!!
@wotfinowski
@wotfinowski 7 ай бұрын
Wild schematic, love it!
@nikolaos9906
@nikolaos9906 6 жыл бұрын
very complicated for so little money ,,,,,,incredible.............
@princebanini
@princebanini 4 жыл бұрын
really interesting video. one can tell you put in alot of work for this. bigups buddy
@drobotk
@drobotk 5 жыл бұрын
I thought you would test if it's really dimmable & how much it flickers when dimmed.
@cheekibreeki904
@cheekibreeki904 Жыл бұрын
0:46 And it was then that DiodeGoneWild understood the meaning of "be careful what you wish for, because you might just get it".
@kurugode
@kurugode 5 жыл бұрын
I agree, he's gone to length to unravel what's inside.. I'm a power electronics engineer and yet it stuns me they packed so much inside this Sub $2 part. Most of the 120V US bulbs don't have such complexity. They just have a few parts and the LED stack. I'll add more notes later. Good Work, Mister.
@LMB222
@LMB222 3 жыл бұрын
The EU sets goals for efficiency + utilities complain if the lamps have poor cos(phi)
@Buzzhumma
@Buzzhumma 5 жыл бұрын
Well done amazing effort . I would really like if you did a video to teach how to draw circuits from simple to progressively harder
@kpsmind574
@kpsmind574 6 жыл бұрын
You are Brave Man.
@hadireg
@hadireg 6 жыл бұрын
hahaha , we all gone wild following this schematic! :D thanks mate!
@alibehrouz9833
@alibehrouz9833 6 жыл бұрын
nice job man
@Greg74948
@Greg74948 4 жыл бұрын
I just can't get over how you were able to draw something so insanely complicated! And all of this for just $2.50? Seems impossible.
@uK8cvPAq
@uK8cvPAq 7 жыл бұрын
I think a lot of the circuit is about keeping the power factor close to 1 so it can work with standard dimmers.
@DiodeGoneWild
@DiodeGoneWild 7 жыл бұрын
Yes, this has almost no filter capacity at the output of the bridge. The chip probably regulates the PWM so that the current is in phase with voltage. This makes the power factor close to 1. And if triac dimmer is used, the power varies with the triac angle in a simmilar way a resistive load (tungsten lamp) would.
@uK8cvPAq
@uK8cvPAq 7 жыл бұрын
Yeah, it could explain the inverting buck converter and all those seemingly bizarre components if they were trying to create phase shifts everywhere. Also most dimmers that people have in their houses are designed to have a minimum resistive load to operate correctly since it goes in series with the lights, so maybe some of those extra components are to keep the triac in the dimmer happy.
@TheSnaiku
@TheSnaiku 6 жыл бұрын
I freakin like this channel
@ledmk2
@ledmk2 6 жыл бұрын
Nice video
@antoniofurtado7791
@antoniofurtado7791 6 жыл бұрын
this is just crazy man
@JamesBrown-ux9ds
@JamesBrown-ux9ds 4 жыл бұрын
Brilliant! Thank you for your service! (And of cause its not easy for the producer to make some profit from it, too many parts, and a lot of them seem to be totally outdated for this purpose. Maybe thats why they totally covered whats in the socket? *gg*)
@eurobum2012
@eurobum2012 7 жыл бұрын
The potting compound helps to spread out the heat and so should make the bulb last longer. These are inexpensive disposable products ... not intended to be serviceable at all.
@krnlg
@krnlg 4 жыл бұрын
Of course, but making 'unserviceable' things still sucks.
@LMB222
@LMB222 3 жыл бұрын
You service them by screwing out and recycling 😉
@oniruddhoalam2039
@oniruddhoalam2039 4 жыл бұрын
The BP3216 is a TRIAC dimmable LED driver IC. It basically changes the voltage in the LED based on the input mains voltage.
@creativekristan8386
@creativekristan8386 2 жыл бұрын
1:13 Him:lidl My subtitles: legal
@SianaGearz
@SianaGearz 6 жыл бұрын
You know what, since it's potted into selastic, i just remembered something. I was at a home improvement store to renew caulking around the bathtub, so i was standing there at a shelf of caulking removal compound - a chemical that releases silicone and acrylic caulking so you can clean it off. While i was there, a salesperson casually strolls by and says "Hey you don't have to buy this - just get get a solvent named 'turpentine substitute', it works exactly the same, and it's about 1/5th the price", and i was like "wow, huge thanks!". I have no idea what they got out of this - perhaps caulking remover was a brand name item, while turpentine substitute is store brand, so that's something they actually make money on. Maybe it was a store chain that was shutting down so they could re-sell brand name stuff to a bulk supplier but not the store brand stuff. Maybe the guy was already let go of with a 3 month notice so what are they gonna do, fire him twice? Maybe he just liked me. It was quite a while back, like a decade or so. I never ended up renewing the caulking though as i had to move for a job, so i don't know whether that's true or how well it works, but it's very, very plausible. Probably beats picking out hardened selastic by hand. Also i'll never pick off and scrape off hot melt glue ever again, just spray or dab some isopropanol around the glue joint or the edges of the blob and it comes right off, works great!
@nikolaos9906
@nikolaos9906 6 жыл бұрын
incredible with so many electronic parts. How do you manage to sell so cheaply? Thenk You for the Video
@RW_CreativeMedia
@RW_CreativeMedia 6 жыл бұрын
The way this LED was made is to make sure you will find it difficult or impossible to repair, so instead, you go and buy a new one. This is what is called: *_Planned Obsolescence._*
@Conservator.
@Conservator. 5 жыл бұрын
Richard WILSON No, They are made to last very long at the expense of not being serviceable. Planned Obsolescence = last not long and not serviceable.
@Bigmuscle888
@Bigmuscle888 6 жыл бұрын
The jungle of madness haha
@kokotajebka
@kokotajebka 6 жыл бұрын
dimmable led bulb, but this can be very sensitive to voltage spikes and it need the Surge protector. This have also sensitivity to demand side management signals in power line - you can see the small blinking as vibration for sec. ( in czech republic HDO signals)
@SianaGearz
@SianaGearz 6 жыл бұрын
Wow, somebody crammed all this into that... and then somehow they even got this assembled - soldered through hole components without SMD on both sides falling off... probably lots of glue under SMD components too. Manual placement of lots of components. Somebody goes through all this effort for such a cheap device... I commend you for attempt at tracing it out, but to complete it, SMD desoldering would be necessary.
@HA7DN
@HA7DN 6 жыл бұрын
I just love the "invisible" flickering, as it hurts my head...
@TheLukasz032
@TheLukasz032 2 жыл бұрын
This is basically due to camera auto-shutter with shutter frequency mismatched with mains frequency. Actually this is also a reason why you never encounter some cheap LED bulb on a film set.
@HA7DN
@HA7DN 2 жыл бұрын
@@TheLukasz032 well, I did not mean flickering on the video, but IRL. Shitty LED bulbs flicker a bit.
@hvk3929
@hvk3929 5 жыл бұрын
Oh. Man. How you do it. I never have a patience to complete the drawing.
@alibehrouz9833
@alibehrouz9833 6 жыл бұрын
thanks
@belastefanko2285
@belastefanko2285 6 жыл бұрын
Hi DiodeGoneWild, how does your DIY watt meter work? This very useful measuring for DIY jobs. Can you explain me how did you make it? Thanks for your reply.
@edreyes5500
@edreyes5500 6 жыл бұрын
I love what you do. It brings back memories when I would teardown electronics and make schematics. Now I rather watch somebody else do it. Electronic porn!
@DomsedCZ
@DomsedCZ 4 жыл бұрын
díky za tvůj čas a respekt že ses do toho schema vůbec pouštěl :o
@christophbisschopinck9050
@christophbisschopinck9050 4 жыл бұрын
The excavation goes on🤗👌😂
@Kyleroo
@Kyleroo 6 жыл бұрын
8:05 Look at the lower-left of the video. Something says "WTF?"
@elektrodoktor
@elektrodoktor 5 жыл бұрын
Meaning "What's The Frequency" most probably.
@arpitjain4025
@arpitjain4025 3 жыл бұрын
those tracks going no where....
@Darknecros7
@Darknecros7 5 жыл бұрын
Try tearing down a LIFX color bulb or a Phillips hue color. I’ve seen part of the LIFX one and it’s filled with the resin as well.
@kolinevans9127
@kolinevans9127 4 жыл бұрын
‘Then the insanity begins’ A normal day for me
@sonnylatchstring
@sonnylatchstring 6 жыл бұрын
It's an import bulb by OWIM GmbH DE in Neckarsulm for LIDL
@BW-ut6pp
@BW-ut6pp 5 жыл бұрын
8:01 LOOL !
@gacherumburu9958
@gacherumburu9958 6 жыл бұрын
👍👍👍 but you forgot to check if it's dimmable..🤔
@picobyte
@picobyte 5 жыл бұрын
@diodegonewild Inverting voltage makes boost/buck regulator in one possible with single inductor.
@josephgynferd8316
@josephgynferd8316 6 жыл бұрын
omg.. you have a nice reverseEngineering background.. this is not an easy task.. nice job.. almost died laughing too. :) btw next time try to use some white erasing liquid.
@thejr.engineer5662
@thejr.engineer5662 4 жыл бұрын
How you measure the power consumption by the DMM
@alphajuice
@alphajuice 5 жыл бұрын
man i love your accent
@lez7875
@lez7875 5 жыл бұрын
saudações do Brasil + like. é muita eletrônica pra uma simples lâmpada LED. muito bom. sucesso.
@thephilpott2194
@thephilpott2194 4 жыл бұрын
Dismantled one of these myself in the UK (A Philips one) and that was 'potted' in resin as well. The most likely reason i could think of was the manufacturer not wanting it reverse-engineered. I see from the waveform that they are simply chopping the sinewave rather than doing anything clever with it. Looks like we haven't fully solved dimming LED's fed from the mains yet. In the Philips lamp the resin was like putty, and impossible to remove without destroying components and losing all the details.
@foogod4237
@foogod4237 5 ай бұрын
Actually, I suspect the main reason for potting is to reduce physical vibration from the high frequencies used in the switching circuit. In cheaper designs, this can cause bulbs to "sing" with an audible whine, particularly when dimmed, but if all of the components are not allowed to move because they are potted in place, it can make the whole thing much quieter.
@lanzaxell4853
@lanzaxell4853 2 жыл бұрын
Could you add bulbs playlist?:)
@belastefanko2285
@belastefanko2285 6 жыл бұрын
Hi there! I like your videos, because your teardown videos are very useful. You measured the bulb of performance with basic DMM. I guess your yellow DMM is 830b or similar one. How did you do it? Thanks for your reply.
@petermesar6905
@petermesar6905 4 жыл бұрын
He is probably measuring voltage drop in mV on 0R22 resistor in series with load.
@ashiq3226
@ashiq3226 5 жыл бұрын
can you do a tear down video of cfl lamp??
@s40s06
@s40s06 4 жыл бұрын
In Schematic there is WTF ? Very left side.. But u hv done great work by drawing it. Tremendous
@oniruddhoalam2039
@oniruddhoalam2039 4 жыл бұрын
Probably it means "What's the frequency ?".
@Zebra_Paw
@Zebra_Paw 3 жыл бұрын
To draw the schematic better check the connections with your meter!
@uksuperrascal
@uksuperrascal 6 жыл бұрын
Hi Diodes - From - UKsuperrascal - As a Englishman, I think it is a complement that you have spent the time and effort to learn to speak english and is much appreciated by me, So to all the People that mock or moan about your accent go and get a life, You try to learn Diodes language, How many of you empty teapots will bother? - For more old english name calling Click my Thumbnail and leave a comment on my latest youtube video if you dare. - BRILL VID AGAIN BY DIODES GONE WILD - But you did not show the light powered through a dimmer switch - ? or was that the click bait -- LOL
@conesillyvalley7182
@conesillyvalley7182 6 жыл бұрын
"big jungle of madness", but thank you for all the work you put into the video. In theory you can unsolder the components and with continuity tester reverse engineer the crappy design.
@sachingowda1785
@sachingowda1785 6 жыл бұрын
You are funny! 😂
@AlvaroGomes
@AlvaroGomes 2 жыл бұрын
Which is the reason why in the video we can see the light blinking continuously and not always a steady light. And how to solve this problem?
@TheLukasz032
@TheLukasz032 2 жыл бұрын
Shutter frequency or FPS mismatched with grid frequency. Also a reason why films in Europe have 25 or 50 fps as opposed to the Americas with 30/60. This camera also has auto-shutter on, which on professional film sets is considered a noob mistake.
@franciscomacedo2704
@franciscomacedo2704 5 жыл бұрын
Best video so far hahaha
@vovtz
@vovtz 6 жыл бұрын
What a shame you didn’t try to dim it before taking it to bits … (chip application sheet specifically mentions it being compliant with Triac dimming anyway).
@LMB222
@LMB222 3 жыл бұрын
5:50 It's heat-conducting silicone polymer
@-Crash-Nebula--
@-Crash-Nebula-- 4 жыл бұрын
in this video you have the voice of one who had been drinking a little🤪
@mrmoon7484
@mrmoon7484 6 жыл бұрын
you are very funny, thanks
@DavidWong46798
@DavidWong46798 5 жыл бұрын
How can anyone IC switch 400V? Even if it can, the closely spaced dimension between the pins do not allow it. Are you sure the ferrite bit is a inductor? Or a transformer?
@metallitech
@metallitech 4 жыл бұрын
The data sheet says: "The BP3216E integrates a 550V power MOSFET"
@maximpopovic4621
@maximpopovic4621 6 жыл бұрын
Super video ale mluvíš trochu divně :D jako nechci tě "hejtovat" ale mě přišlo že si nějakej rusák nebo něco takovýho ale pak sem viděl czk a bylo to jasný :D jinak super video
@plamenpetkov6958
@plamenpetkov6958 5 жыл бұрын
The topology is inverted Buck.
@binaryglitch64
@binaryglitch64 6 жыл бұрын
How apropos to the name of your channel.
@californium-2526
@californium-2526 10 ай бұрын
3:31 Note the negative light projection! 8:55-9:06 Chaotic board tracks as an anti-reverse-engineering tool?
@Remo-media
@Remo-media 5 жыл бұрын
I need to dim an LED tube with the input downsteped input of 120v 50hz... cant this be done flicker free?
@TheLukasz032
@TheLukasz032 2 жыл бұрын
Yes, it can. Use a constant current regulator with properly stabilized output.
@fungusenthusiast8249
@fungusenthusiast8249 4 жыл бұрын
it when electronics are potted in resin. It makes it so hard to do anything with it.
@BigEightiesNewWave
@BigEightiesNewWave 4 жыл бұрын
Lidl market has Lidl prices 😁
@melplishka5978
@melplishka5978 2 жыл бұрын
Need bigger fire extinguisher for that one lol.
@cmuller1441
@cmuller1441 6 жыл бұрын
Look at the datasheet of bp3216 from bpsemi.com.cn it's a triac compatible led driver...
@TR2000LT
@TR2000LT 6 жыл бұрын
Your carrier is “KAKTUS” .....
@yoshibros1111
@yoshibros1111 5 жыл бұрын
??
@CJWarlock
@CJWarlock 5 жыл бұрын
@@yoshibros1111 @3:53, the cell phone screen, upper-left corner. :)
@yoshibros1111
@yoshibros1111 5 жыл бұрын
Yah yah yah slaps in face sh* t
@lsswappedcessna
@lsswappedcessna 6 жыл бұрын
the flicker went away without the cap. Odd.
@jort93z
@jort93z 6 жыл бұрын
You should have checked the datasheet of that chip, it has half your schematic on it.
@user-py8cz6vf8z
@user-py8cz6vf8z 6 жыл бұрын
👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
@danijel124
@danijel124 6 жыл бұрын
Diode do you own a 3d printer?
@listrikb6885
@listrikb6885 5 жыл бұрын
Can you make a simple circuit using led strip?
@makinjica
@makinjica 2 жыл бұрын
I am amazed by how much of electronic waste goes with this LEd lights when they die . Its a hell of a way to boil a Light ..
@dst0815
@dst0815 6 жыл бұрын
:) proč mluvíš s indickým přízvukem? xD
@wraiths_
@wraiths_ Жыл бұрын
Maybe its a three layer board?
@jimw83296
@jimw83296 6 жыл бұрын
that black stuff isn't resin......it's silicon,if you take your time, it comes off pretty easily.
@kjm-ch7jc
@kjm-ch7jc 2 жыл бұрын
The accent is similar to the Chynese water torture.
@nebula6981
@nebula6981 6 жыл бұрын
try to tare down an expensive led bulb from phillips : Philips | MASTERLED 60 | 230 V | 7 W | 30-40 W it will amaze you !
@danielvantland
@danielvantland 5 жыл бұрын
Light belb
@gabeulrickson2496
@gabeulrickson2496 6 жыл бұрын
Aren't all lights flicker based tho?
@TheLukasz032
@TheLukasz032 2 жыл бұрын
Technically traditional lightbulbs as well as CFLs operate that way, but you don't see it due to both material inertia (especially in traditional lightbulbs, where tungsten lights up from high temperature) and optical illusion. Cameras amplify the effect when set badly (frequency mismatched with FPS and shutter). LEDs can be driven flicker-free using stabilized constant current regulators, which is actually commonly used in professional lighting solutions for TV/film studios.
@404lexx.
@404lexx. 5 жыл бұрын
From wath country are you your country have lidl too
@euromen
@euromen 5 жыл бұрын
Czech republic ;-)
@starforce224
@starforce224 4 жыл бұрын
And Euros??
@salimamara1665
@salimamara1665 6 жыл бұрын
So do LED LIGHTS WORK WITH DC OR AC?
@danielvantland
@danielvantland 5 жыл бұрын
With DC, but it's converted from AC
@plamenpetkov6958
@plamenpetkov6958 5 жыл бұрын
As usual with DC current. A buck regulator with current (instead of voltage) feedback maintains the current. Dimming is supposed to be performed by duty cycling (on/off) this constant current
@bestamerica
@bestamerica Жыл бұрын
' in here america is a AC 120 V
@roran60
@roran60 6 жыл бұрын
čech ? tak to sme skoro susedia :D