Fix It!: Self-Dimming LED Downlight || How a new hardware revision improves everything!

21. 02. 2021
94 554 zhlédnutí

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In this episode of Fix It! I will be having a look at a self-dimming LED downlight that quit working after only 1.5 years of usage. I will not only find the simple mistake that makes the light useable again but I will also explore the lights circuit secrets. I will show you exactly how it works and I will also directly compare it to the same lamp type which was produced a couple of years later and show you how the new light does everything better. Let's get started!
Thanks to JLCPCB for sponsoring this video.
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2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod
0:00 Showing the faulty LED downlight
1:49 Intro
2:29 Removing the light
3:08 Testing the light and finding the culprit
5:08 Disassembling the old light
5:40 Finding out how the old light works
7:49 Comparing the new light with the old one
10:03 Conclusion

  • I have recently broken a light bulb, and the circuit is very similar to the new hardware revision showcased in this video.

    Marko JojićMarko JojićPřed 25 dny
    • I have also indentified a full bridge and a LED driver, with public datasheets.

      Marko JojićMarko JojićPřed 25 dny
  • One of my best teacher ❤️

  • Great video as always👍 Thanks for sharing your experience with all of us👍😀

    Asger VestbjergAsger VestbjergPřed měsícem
  • Is it me or you lost weight ? :D

    JS7457JS7457Před měsícem
  • 👁 👁 👃 👄

    Gorkha EngineeringGorkha EngineeringPřed měsícem
  • Sherlock scott

  • New Idea: Power inverter using sg3525 and IR2110?

    matija jemecmatija jemecPřed měsícem
  • Why don't you make an ossciloscope using arduino.

    Vansh wanth KumarVansh wanth KumarPřed měsícem
  • Can you make a video about sensored and sensorless brushless systems like Castle and Hobbywing?

    KEEKAY _CG32 C7.RKEEKAY _CG32 C7.RPřed měsícem
  • Please make anything using raspberry Pi zero

    Amal JazzamAmal JazzamPřed měsícem
  • Ending with " i will see you next time" so cringe

    VoidexVoidexPřed měsícem
  • Do you think you'd ever do a DIY or buy for HDMI KVM's? I do a lot of work on 3+ computers and would love to build a diy KVM but I don't know where to start. I know software solutions exist but I'd love to get the hands on knowledge of building it myself! Great video btw :D

    Michael GonzalesMichael GonzalesPřed měsícem
  • I really enjoy your channel :)

  • Time 4 a new intro Mabey

  • Hey Scott! I see you sometimes using Arduinos. I don’t know if you know the Seeeduino XIAO, but maybe that’s something cool to check out ? Recently saw them on AliExpress and decided to buy a bunch. Really tiny devices and you can do quite a bit with them.

    Productions of Children ChildrenProductions of Children ChildrenPřed měsícem
  • Love to see improvements in even the smallest part of one’s home’s appliances.

    Li RyanLi RyanPřed měsícem
  • No flickering is GREAT. PWM is usually use because it cheaper. Glad to see the new IC.

    B. WinkyB. WinkyPřed měsícem
  • Isn't it ugly to sell something else under the same name?

    Fifi FifiFifi FifiPřed měsícem
  • Great! By the way can you explain how that multiple outputs are handled by single pole switch using RC timer. Past couple of days I was building an adjustable temperature led light panel to my room. This kind of function might be the best way to control it.

    Pavithra WeerapperumaPavithra WeerapperumaPřed měsícem
  • Are there any differences in light colors between both dimming technologies? I think the cause why using PWM is to maintain the full and original light color. Liebe Grüße :D

    MrMaxG95MrMaxG95Před měsícem
  • What the fuck is wrong with your language? Who in their right mind looked at german and thought "hmmm... not enough rules" and why did the same individual after getting high on brake fluids decide to make a crap ton of exeptions to those same rules. What the actual fuck

    Zoltan Rusé-TasnadyZoltan Rusé-TasnadyPřed měsícem
  • Are you an electrical engineer or an electronics engineer?

    AlexAlexPřed měsícem
    • @GreatScott! so you know so much about electronics because you learned on your own?

      AlexAlexPřed měsícem
    • Electrical power engineer

      GreatScott!GreatScott!Před měsícem
  • I'm so hooked on this channel that now I'm starting to say "Stay creative and I will *S E E Y O U N E X T T I M E* !" like him

    NoorquackerNoorquackerPřed měsícem
  • Very interesting

    Evgen EvgenEvgen EvgenPřed měsícem
  • You are my favourite youtuber! i always like you`re videos.

    Victor CimpeanVictor CimpeanPřed měsícem
  • I always thought your name was Scott 😅😅

    RoboGenesRoboGenesPřed měsícem
  • Normal people:buy a new lamp Great scott:let's open it and see what's inside

    Agent 14Agent 14Před měsícem
  • I dont trust Ebay, Aliexpress etc.

    goomeModegoomeModePřed měsícem
  • welcome Mr. breath

    Mr.SoftwareMr.SoftwarePřed měsícem
  • i had same problem

    Jaime ValdezJaime ValdezPřed měsícem
  • Damn that electrical box is a work of art. I mean, great video as always, but damn that's nice cable management.

    bur1t0bur1t0Před měsícem
  • Yeah! Fix it! Don't buy. 😂 This technology now sucks! SMPs! About the parts they use with no info on ineternet, maybe it's anti-great scott. 😁 Yet, not working. Lmao.

    WR Electronics Research & DevelopmentWR Electronics Research & DevelopmentPřed měsícem
  • GreatScott, the man who empties his pens faster than he manages to dim his LED lights;)

    Axel LambertAxel LambertPřed měsícem
  • Scott had a Big Clive moment. Approved!

    Marco CostaMarco CostaPřed měsícem
  • i enjoyed that video : )

    keith kingkeith kingPřed měsícem
  • Hello Great Scott! Nice video. Did you understand how the new design converts AC to DC and boost it ? I cannot see any capacitive dropper like in the old design ...

    Laëlien RoussatLaëlien RoussatPřed měsícem

    Lego Mini Movie ProductionsLego Mini Movie ProductionsPřed měsícem
  • How does the cable break inside the ceiling? It's not like it's currently being moved...

    Mobin92Mobin92Před měsícem
  • after watching many of your videos and subscribing. what pen do you use to write with in your videos? it writes nicely and your hand-writing is top notch for these videos.

    HeadfirstRecordsHeadfirstRecordsPřed měsícem
  • That is one nicely organized fuse box, very neat cable management.

    ACorgiWithaCrownACorgiWithaCrownPřed měsícem
  • I really don't get the dimming part. Is it just the 0,5s transition?

    MartinMartinPřed měsícem
  • You sir are the reason I have 7 toolboxes filled with circruitry components and soldering hardware, and also the reason my girlfriend calls me Tazer Boy! Keep up the epic content, you've saved a lot of people a lot of stress, hassle and trouble over the years by making electronics simple, fun and rewarding to learn and understand!

    Nate KrauserNate KrauserPřed měsícem
  • super brother

    Gorkha EngineeringGorkha EngineeringPřed měsícem
  • I think all (dimmable) LED lamps and pc/laptop monitor back-lights should be driven in the same way as the new version. Flickering LED lamps are uncomfortable to the eyes and can be really annoying, especially on lower PWM frequencies.

    Aristo12Aristo12Před měsícem
  • OMG, please remove the stickers from the lamp, what are you going to do with it, re-sell it? 😂 "LED downlight, hand-touched by Great Scott, OVP" 😂

    Stefan KachaunovStefan KachaunovPřed měsícem
  • omg Scott how did you manage to hook up the oscilloscope to 205v 🤔🤔.....??????

    mahmoud flmahmoud flPřed měsícem
    • Shunted it?

      maphantommaphantomPřed měsícem
  • Oszilloskop für 13.000, jetzt bin ich neidisch ;-). Ich bin am überlegen, ob ich mir eines für 250,- hole, aber wann brauch ich das schon, bin ja eher Software-Entwickler, von Elektronik habe ich nur bisschen Kenntnis, bastle aber gerne mit Raspberry/Arduino....

    Dominik E.Dominik E.Před měsícem
  • I wonder how the cable break happened, because the cable wasn't bent back and forth all the time

    HermannPaschulkeHermannPaschulkePřed měsícem
    • Temperature changes will change the length of the wire, gradually bending it over and over, causing the copper to work harden and eventually snap. The temperature changes could be as simple as the difference between day and night. Just one of the reasons strain relief matters.

      bur1t0bur1t0Před měsícem
  • OK, but why it did not work after 3 swaps?

    Precup FlorinPrecup FlorinPřed měsícem
  • Using embedded LEDs is a mistake - plug in GU10 is much better - can change failed bulbs cheaply, no risk of the same style going out of fashion, can change colour temperature if you want...

    Richard InParis18Richard InParis18Před měsícem
  • I'm going to guess its that poly film capacitor.

    Luke FLuke FPřed měsícem
  • china electronic factory dont want your video. it is not good for their sale statistic.

    Kiki GunawanKiki GunawanPřed měsícem
  • Hello, your videos are really awesome but in your 4th q and a you said you’d make a beginners guide too drones, I know your projects take a lot of time to make but could you maybe this year do that video

    Rick c137Rick c137Před měsícem
    • @GreatScott! oh and I have one more idea for a big Projekt, maybe a pi 4 smart mirror would be cool yet this Projekt would take pretty long to finish.

      Rick c137Rick c137Před měsícem
    • Not sure

      GreatScott!GreatScott!Před měsícem
  • Good to see your face reveal

    Nitin ThakurNitin ThakurPřed měsícem
  • If you're reading these comments, I designed a current controlled led really very simply, and I don't think I've seen anyone else do it! use a simple LDR and a resistor to create a voltage divide to power on/off an NPN transistor, all you do is run a couple of small cables to a little pcb/headboard /pef etc... and mount the ldr facing your light source... add a potentiometer to the LDR/voltage divider that powers up the transistor, and simply set it to the desired brightness, the only downfall is if something gets between the ldr and and the light source being powered if it gets hot the led gets brighter, but it wont because the LDR will adjust, I ran a 10watt 12v cob led with this design, no current limiter (well the ldr/divider is the current limiter, brighter it gets the less power the transistor gets)

    cjdelphicjdelphiPřed měsícem
  • subscriber here from philippines all of your work are great hoping some day i will meet you!! Davis John Tv as your fanatic :)

    Davis John TVDavis John TVPřed měsícem
  • You take something off or put something back on to mains voltage without raking any initial measurements?

    Dimitri ValkirDimitri ValkirPřed měsícem
  • how can i contact you directly

    Francis GuchieFrancis GuchiePřed měsícem
  • Ich fühle mich bei den Worten am Ende jedes Videos (See you next time), als würde man auf Krampf versuchen mir etwas auf englisch vorzuspielen. Heute besonders übertrieben das sogenannte Kanal Markenzeichen. 😅

    ChrfilmerChrfilmerPřed měsícem
  • Your Landlord is real lucky, to have a guy like you.

    Shashi KiranShashi KiranPřed měsícem
  • hehe had a similar issue and found the LEDs were actually fine but the mains side had an issue which I just didn't bother working out

    PhizicksPhizicksPřed měsícem
  • Thank you! I have had the same lights here, they started flickering really badly at some dimming stages so I wanted to disable it. Now at least I have a nice schematic, I was always too lazy lol

    JulianJulianPřed měsícem
  • Could you make a diy or buy vidéo for a multiple smart plug? I want to build one with (the lidl version) a node mcu few relay and a hall effect sensor for current measurements

    Oneil GoisotOneil GoisotPřed měsícem
  • Strange seeing a fuse box full of brown & blue wires instead of red & black.

    MerlinMerlinPřed měsícem
  • Interesting ! As usual !

    Philip GevaertPhilip GevaertPřed měsícem
  • Landlord: give me rent Great Scott: you get your rent when you fix this damn light.

    redstone craft guyredstone craft guyPřed měsícem
    • *when I fix this damn light

      Máté KovácsMáté KovácsPřed měsícem
  • a company that actually upgraded their product... thats rare

    The Chemical WorkshopThe Chemical WorkshopPřed měsícem
  • Hi @GreatScott!! I am an amateur electronics enthusiast. Requesting you to make the easier versions of basic electronic components and its function. It will help me out with all the confusing concepts. Thank you btw excellent content!! Keep it up!!

    NHbinaaa 111NHbinaaa 111Před měsícem
  • *💡 Burns* - Everyone else "oh crap" - Great Scott - "YES, Let's make a video about this and make it educational." 👏👏👏👏

    pkrokerpkrokerPřed měsícem
  • DiodeGoneWild would love those led

    Faysal Khalashi™Faysal Khalashi™Před měsícem
  • 16A breaker for 1.5mm²?

    something genericsomething genericPřed měsícem
  • Quality pcb

    G DG DPřed měsícem
    • All I hear when I hear greatscott talk

      G DG DPřed měsícem
  • I have never been so excited about an LED downlight before your speech at the start of this video.

    FishFishPřed měsícem
  • Does the LED power supply not usually include switched mode power supply? So the dimmed version is more efficient? Makes no sense to dim the lights and use just as much power…

    Stephen WikStephen WikPřed měsícem
  • When did u reveal ur face?

    roukroukPřed měsícem
  • Sir you look amazing ang intelligent.

    Javier's DIYJavier's DIYPřed měsícem
  • Sirs, I just wanted to inform you that I engaged that "like" button.

    me3d noneme3d nonePřed měsícem
  • Ah, I see, the surge relay solves the problem of traditional toggle switches only being able to allow three switches to control any single circuit. With one of those, you can put in any number of instantaneous switches to control the lights from as many points as you want.

    David EvensDavid EvensPřed měsícem
    • @Andrew Young Hmmm...went through the logic diagrams, and looks like you're right. Wall area isn't the only problem, of course. Switches, electrical boxes, and wire to run between them costs money, too. And unless you're building something akin to the Winchester Mansion you won't need all that many switches (perhaps one per doorway in a corridor, and perhaps one more than that in any other room).

      David EvensDavid EvensPřed měsícem
    • You can have as many intermediate switches as you want in a "two way" lighting circuit. Within reason of course, at some point you'll run out of wall space for the new switches.

      Andrew YoungAndrew YoungPřed měsícem
  • I miss that electronic basics LED cube intro :")

    Seif IhabSeif IhabPřed měsícem
  • For me, the flickering would be noticeable without a camera. Stupit cheap LED's.

    Matty0311Matty0311Před měsícem
  • I wonder what your landlord thinks of your antics haha

    Falxie_Falxie_Před měsícem
  • As a warning: LEDs that use higher voltage and burn brigther most of the time fail sooner. Would be interesting to know.

    Totally TiltedTotally TiltedPřed měsícem
    • @renegade2k Not adequate. High voltage LEDs are most of the time tiny LEDs put in series, which means they have to be balanced, else one tiny LED gets higher voltage than others (even though it's the same current, it will still burn brighter - and fail faster). But putting them in series on a small chip more often than not makes them unbalanced, which means either the QA has to be good, or the high voltage LED will fail soon. That has nothing to do with the throttle.

      Totally TiltedTotally TiltedPřed měsícem
    • Well, Cpt. Obvious, a cars motor, which you drive all way long at full throttle will also break sooner, as a car you drive carefully and slowly ;D

      renegade2krenegade2kPřed měsícem
    • oh no

      Casper den HaanCasper den HaanPřed měsícem
  • Philipps Dubai Lamps

    Johannes ElectronJohannes ElectronPřed měsícem
  • Wo bekommt man die neue, bessere Version?

    Ṩteᶂaη M͓̽eḯer͓̽Ṩteᶂaη M͓̽eḯer͓̽Před měsícem
  • Nice video

    Elektronik AtölyemElektronik AtölyemPřed měsícem
  • Plz help 🥺 make video on Diy Aquarium light

    Ujjal udlUjjal udlPřed měsícem
  • video on led driver

    partho protimpartho protimPřed měsícem
  • With due respect. I like to watch your videos and learn a lot. But the Balkans Bosnia and Herzegovina is not German, unfortunately. I can't order parts for my projects. Do the best you know, thank you

    Edin edinEdin edinPřed měsícem
  • Thank you so much for the explanation, the comparison of two products of the same type but different versions is quite helpful..

    Blà ZeRBlà ZeRPřed měsícem
  • Much better design. Pity we can't get the version that Dubai commissioned Phillips to produce. Much cheaper to run and last so much longer. Each led diode only runs at half the rated specs.

    Steve TobiasSteve TobiasPřed měsícem
  • Redesigned lamp costs less to make, improved quality and more efficient. Wow those redesigners did it again.

    Paul van DintherPaul van DintherPřed měsícem
    • This just proves that as an engineer, your work on a product isn't in all cases done when it hits mass production.

      Máté KovácsMáté KovácsPřed měsícem
  • Philips has gu10 and e27 lamps which have this. They also get warmer the more you dim them to mimmic halogen lights.

    Floris SchoutenFloris SchoutenPřed měsícem
  • If those are high boltage current sources you can short a led and the others have the same brightness. I've done it wit a cheap non-dimmable bulb.

    Mircea Nicolae PopMircea Nicolae PopPřed měsícem
  • When your video on raspberry pi pico will come?

    Eiadur RahmanEiadur RahmanPřed měsícem
    • @GreatScott! a request, plz treat pico as raspberry not like Arduino which others do. They all say that, its more powerfull then Arduino but they all do verry basic LED blink project!!!

      Eiadur RahmanEiadur RahmanPřed měsícem
    • When it is done🤷‍♂️

      GreatScott!GreatScott!Před měsícem
  • Why are the 3 mains-phases switched in your fusebox? it goes L1 Brown, L3 Grey and then L2 Black. Or does Germany use a diffrent standard compared to the Netherlands?

    Tim BlackfoxTim BlackfoxPřed měsícem
  • For some reason you look way different than i imagined.

    MelodyMelodyPřed měsícem
    • People never look like they sound.

      Genghisnico13Genghisnico13Před měsícem
    • In a good way?

      GreatScott!GreatScott!Před měsícem
  • Nice and interesting! I don't get why anyone would think the efficiency would drop if the current value of the constant current driver is adjusted to dim the light. That's the way it should be and I would expect the efficiency to go up instead - wich was apphearently also the case. Having an extra PWM step that does the dimming, increases both circuit complexity and losses. Lowering the voltage doesn't waste that much power for a switching regulator, unless the voltage drop and increased output current (compared to the input current), is so large that the voltage drop over diodes and transistors become a significant percentage of the output voltage. Since it's LEDs it drives, the voltage have to be lowered just slightly to get much less current flowing - that small decrease in voltage shouldn't change the efficiency much. I think the increased efficiency of the new driver, IS mostly because they got rid of the unnecessary extra "conversion step".

    Speeder84XLSpeeder84XLPřed měsícem
  • Hi Scott. Nice explanation about these lamps. BTW could You make a video about regenerative receivers and which design is the best to be built, even the LC calculations ?

    Emerson CapuanoEmerson CapuanoPřed měsícem
  • Hi GreatScott ... i find your Tube's interesting and inspiring and i learn some every times. I find it odd that the wiring is broken because the installation is static, no movement. I would have thought that it was a led that was broken, seen it before. Then i saw the installation, no junction box behind the led light. I have thought you German have "ordnung muss sein"

    Jesper DehliJesper DehliPřed měsícem
  • You should remove the stickers from the aluminum trim non the lights. Its looks not so nice with the factory information stickers left on.

    Roderick RoderickRoderick RoderickPřed měsícem