Induction light - what's inside, schematic, experiments 

This was a fascinating tear-down. Well worth the time. Thanks for taking the time to make this video.

This light must be the ham radio killer

Preserve them properly, the driver and construction is wonderful, it is built to last. Thanks for the disassembly, these lamps have always fascinated me for their great durability.

Beautiful piece of engineering. This is 1000 times better than any short or tick-tock video. Thank you! I will order a lamp of this type to use at my workshop, after my bad experiences with LED outdoor lights. I really appreciate your time spent on this.

24:00 that's because an analog scope doesn't show you one-time events, like those random pulses on the digital scope. Or rather, it does show them to you, but the human eye cannot see them fast enough due to them not repeating in a certain pattern, like the gate drive signal. A digital scope shows you those because it first stores all the info it gets from the ADC, then it displays the info to you, including random pulses and noise. Also, the long vids are great, your vids always feel too short :)

You know its going to be a good day when diodegonewild uploads

Very interesting lamps, never seen them before. Thanks for making the detailed video.

Great video. I had never seen a lamp like this one. I have been working with electronics for thirty years, in my experience I have only had contact with a few examples from Eastern Europe because the machinery I used to maintain had parts from Hungary. Very interesting. As anyone can see, the cat is very concerned about your health.

Very cool and well constructed lamps, thanks for explaining us how they work!

Great video. The lamp housings are very cool, the sort of lamp housings one often sees in restaurants for the "in" people. The length is fine with me, those shorts and tic-toc videos are clearly designed for those with a short attention span.

Never heard of inductive lighting before. Thanks for sharing.

It's so cool that my home city is still using these type of lamps since 2016. Right now, they're still in operation and they haven't loss their brightness since. They're very robust and long lasting. Sadly, they're ever so slightly being replaced by LEDs.

I love that some random components are flopping around in the variac knob. Never change DGW!

I am always happy to watch longer videos on your channel :D Also, i really like all these teardowns :D

Nice job! I was always fascinated by these. I liked the reverse engineering of the ballast. 😁

Awesome video and teardown. Maybe one day you can get your hands on a sulfur lamp, I'm sure that would also make for a really interesting video. Or you just build one with all the magnetrons you got ;) Btw, at 19:41, you can see that they even printed the time when the board was manufactured or designed on the silkscreen (14:48:42)

Great video and very happy with the longer formats.

Thanks for this in-depth teardown and operation. I've always wanted to know how these things work and see the internals. As usual, great video.

Induction lamps were used for street lighting for a brief period in the US. Because these are 5000K, they would probably make great video lights.

Thank you for the best deep dive electronics channel on the planet.

Really interesting! I have never seen a lamp like that before.

I've been waiting for one of these types of videos with an induction lamp for so long!!

Every time I learn something new. Thanks a lot for these videos.

your videos make me smile. thank you!

You were straddling the Nyquist frequency which was giving you the frequency aliasing but you already know this! That light could almost be another retina burner!😂

What an awesome fixtures! Great build quality and technology, i didn't even knew there were light tubes electrodeless induction driven. I wish i could have a couple of them, you friend was pretty cool in give you those nice fixtures. I like to see that you refurbished one, very cool indeed. Also your videos are never to long, please keep going with your great work and content 👍

These have a very well made power supply. Most would be fried with operation with the wiring changes and open transformer. Also the wire coil in the glass pip is the ignition antenna. The plasma forms around that then ignites the rest of the lamp.❤

good teardown and explanation as always👍

Very cool! I'd love to have one as a work light for my electronics bench. Great job on this video.

I definitely prefer your videos, love it, keep going 😎👍👍👍👍👍👍👍

Those are my favourite videos. Thanks.

Thanks a lot! Haven't seen these lamps ever in my life.

Thank you very much for the this long and very informative video (not like some crappie stuff on TikTok or shorts). I really appreciate your work. 👍 Merry Christmas 🎄

So huge. Hope you have a large attic

Very good - Thank you Gave me 30 minutes of joy with 100% concentrated attention at 3:30 am Oct 30 2023

I like long videos because are more detailed one!Keep it up!

Great video as always Watching from Africa.

The verdict? Nice!

28:00 I love how the autotransformer knob is used as a random parts bin :)

These lamps are far more reliable than most of the LED equivalents and can last up to 100,000hrs

as always nice video❤ watching from iran

love the longer videos

Nice video,,,we need much longer videos👍👍

Very nice lamp, mine inductively coupled plasma functions in a similar way.

22:30 you can also notice that the ON time here is nearly constant and that makes sense when you look at the boost converter topology and average input current.

oh the crazy czech with the magnetron plasma speaker has a youtube channel, awesome, love your stuff :)

what an incredible video! Such a promising technology was discarded by LEDs… and talking about fluorescents, when will you make the video about the Philips electronic starters that you showed in a past video? I am anxiously waiting

so entertaining and informative, thankss

Finally a SMPS video. Niceeee!

Very interesting, keep it up. Like the Cat and the Dog as supervisors.

Really interesting, thank-you

Nice work.

Supr video! Díky :)

Allways good!

svaka cast na videu

Lol 9:16 random but I love it. "...and here is the dog."

Because this fluorescent ring lamp does not have heated cathodes on its' end it is very difficult to see how it can possibly fail. Also there should be no darkening of ends for the same reason. No wires threaded through the glass should also add longevity. It looks like that design is well out of step with the 21-st century philosophy of "built-in obsolescence" which probably explains why it has been largely discarded.

When I was younger I would have used these for growing special plants😂

Interesting video thanks

long videos are always better than short ones. its impossible to get this deep into something with a shorter video

Dobrý pivo na začátku. :D (Nice beer at the beginning. :D)

🎉Great video 🎉

Been subscribed to you for a long time now. When are you making a live?

Awesome!

Thanks great job Plz experiment on strat tube light with these induction rings.

They are very attractive light fixtures. 5000 K is blindingly bright. I like the softer lighting around in the 3000 k Spectrum. Fascinating teardown! Thank you for the video & for a chance to see this type of Technology!👍

for the high side FET i can see a few reasons why you want to use a transformer but for the lower one the only reason i can imagine is extra safety OR control is somehow galvalicaly isolated itself from the lamp part

love the reference dog.

Thanks!!!

I'm curious: what is the benefit of this induction style lamp over a notmal filament based fluorescent light?

Very nice. I think my city has bought some of these with the tiny bean in the middle for street lighting in the short period before LEDs. They are still running them! What has been bought is being used until it breaks or the supply of the lamps has depleted. German cities are more ecological and sustainable than German enterprises.

Even in this era I think this lamp is still have their own place. They are is relatively compact, energy efficient, and doesn't require massive cooling like LED

that big reflector would make a interesting topload for a tesla coil

I like how you start the video with a fire extinguisher

Those glass covers may be interesting for making a wimshurst machine.

What makes the clicking noise when there does not appear to be a electro-mechanical relay? All the best to my fave channel!

22:18 I think it's to make it a bit more bulletproof in overvoltage or similar cases. That transformer will 100% certainly lock out one mosfet while the other is running so that means a short is basically impossible. It will always fail just dead instead of failing smoked and spicy like a good dinner

Those are so cool. I've never heard of this tech before for some reason.

Ďakujem za toto zaujímavé video, ani mi neprišlo nejako veľmi dlhé, ubehlo to rýchlo, lebo ma to bavilo, ja pozerám také elektronické videá, kde sa robí niečo konštruktívne, ako napríklad vysvetľuje nejaká teória, niečo sa rozoberá a vysvetľuje princíp činnosti, ako tu v tomto videu, ešte mám rád aj také videá, kde sa niečo vyrába alebo opravuje. Osobne ma nezaujímajú videá o elektronike, kde ide iba o "špeciálne efekty" ako napríklad odpaľovanie alebo rozbíjanie niečoho len tak pre zábavu, na prvý pohľad to môže vyzerať zaujímavo, ale podľa mňa sa také videá rýchlo opozerajú. A ešte by som chcel niečo povedať k tomu gate driver IO, prečo sa výrobca rozhodol použiť gate driver transformer (GDT), myslím si, že výrobca to urobil preto, aby bolo zariadenie spoľahlivejšie, čítal som niekde skúsenosti nejakého konštruktéra (už si vôbec nepamätám, kto to bol ani kde to bolo), že tieto IO pri budení horného MOSFET-u, kde musí byť použitý bootstrap kondenzátor a dióda, tak niekedy majú problémy so spoľahlivosťou, takže asi to výrobca vedel alebo mal sám s tým problémy pri vývoji, tak sa nakoniec rozhodol ísť "na istotu" a použil radšej GDT. A samozrejme sa veľmi teším na video, kde budeš opravovať časovú základňu toho osciloskopu Tesla, v poslednom videu o oprave tohto osciloskopu si myslím vravel, že bude ešte jedno video o oprave tej časovej základne.

Great lamp As for efficiency, the worst part about its bad for the enviroment crap is that they forbid the sale of it (from incondecent lights that are inefficient (although all the money u save on electricity u spend buying new lamps, because leds like everything else also break and cost twice as much), to flurescent tubes) So even if I would like to use this its impossible to do so because I am unable to buy replacment parts You will buy led for twice as much, and u will throw it out after a short time because we said so.... Hmm, some day led will be seen as inefficient....

These reflectors are great industrial design, I'd find a way to reuse them.

This light fixture would have been either impossible or huge if it's operating frequency was much lower! I have seen a power transformer built in the early 1900's, designed to work on 25Hz.... It's bloody huge! It just amazes me that a small transformer can put out the same power as a large one and the only difference needed is a difference in AC frequency! LoL now you can have an induction light above your induction cooktop.... Nice 👍

In the medieval times like 20 years ago Tungsram in Hungary was developing induction lamps. Now both inductions lamps and Tungsram are gone (partly thanks to GE I guess).

Классные светильники) Интересно какой у них ресурс.

You really gotta appreciate industrial electronics - basically indestructible, and when they're thrown away it's usually because the owner wants (or needs, due to regulations) something newer.

Non exposing side need internal reflective coating. Why circular section tube? Thin flat rectangular section is more efficient.

Good excellent

Assuming the power supply doesn't give out, I wonder what is the lifespan on the bulb and what it's failure mode would be?

A little surprised you didn't try measuring the discharge with a coil wrapped on the tube.

"here's the dog for a reference" haha... How big is the dog? 80Lumen/Watt.... not bad....I think LEDs do close to100Lumen/watt I wonder how much that lamp has lost over the years. Maybe that's why they replaced it? I have a Lux meter, but no idea how to measure the Lumen output of a lamp... would make a nice follow-up video ;-) Anyway. Big thank you for another outstanding video. No bells or whistles, but solid technical explanations... and a good dose of humor.. just as we like it !

Beautiful lamp that! Would love to see the spectrum, assuming it would similar to a regular florescent?

Seen these in a few shops, even brightness between fixtures and good colour rendition. In theory last forever, don't know in practice.

Please make a review of bidirectional technology in solar inverter like voltronic

I'm still waiting for microwave light overview. I've seen like an Australian guy has remelted such light fixture into inglot, unfortunately.

It looks like this GDT circuit is similar to the one using IC TL 494., isolated and safe.

I wonder what the life expectancy is on the bulb are you meant to throw the entire unit away or disassemble it and just change out the phosphorus tube They're built really nice actually I mean it wouldn't be too hard to keep these things going forever if you had tubes

How long does it take you to reverse engineere schematics like that. Do you trace it out on the board or do it with the continuity on the multimiter, or maybie even measure sone voltages for chips or on transistors to know how ot works? Or do you already know how the schematic could look like? Just asking so I could learn that too. I bet it takes a lot of time and patience. Also you make great videos, doing diy stuff the normal way without any flashing rgb leds and trash like that wich wastes your time power and money. You give schematics and explanations of them and I like to learn from you. The best thing is that you often make your own solutions without fancy chips like others, but rather transistors and op amps (like current limiting for example) and basically discrette components wich are or arent salvaged.

In Poland we say "start from the ass side" but in this case ass site is front of lamp, where You start 😂 You should first disconnect the tube wires from the rear of lamp. Best regards from PL.😊

It should be a law everywhere that bulbs have a power factor rating along with their wattage.

I wonder if you could use blown fluorescent tubes (blown filaments) wind a few windings on the ends and use them as induction lights