Hi welcome to the second episode of Eevee Smoke. The best place to find a magic smoke porn anywhere on the interwebs. We had 75 thousand views on the first video and about a 90% thumbs up ratio. so it'll be interesting to see results from the second one to see if people really do like this concept or not.

Oh by the way, I had like 70 80 entries like submissions after the previous one. So sorry I can only do a few. So here we go: I've got some beautiful ones for two beautiful ones. First, check this out, let alone my beautiful backdrop there isn't it wonderful.

Anyway, here we go Tada! thank you very much to our Max Talk who is on the Iev blog forum sent in this. Look at this. It's an IGBT an insulated gate bipolar transistor. It's had the add the absolute snot blowing out of it.

Now this is the die cuz these are typically IGBTs I'm going to do a teardown on this soon actually. I've been I've had one like a real proper industrial one for ages I've been meaning to tear down Anyway, these things are usually not encapsulated as such. They're like bad ion heatsink and then they've got the goop on them which we'll see in the next submission. But look at this.

Max Talk believes this is the gate and the source. I Don't know my Gbt, you know, died construction and things like that. but look at that just. it's incredible.

Look at the big gouges taken out of here. so that's between gate and source is that is just uh, it's just. molten all around here. it's everywhere.

It's just remarkable. So if there is that like a gate overload or something and it's punched through and it's just yeah, it's just shorted out, all the energy is being dissipated in that poor little sucker. Oh look at it, That's just. that's a beautiful photo.

I Love that. And he got this photo by cleaning off all the soot afterwards. It was like completely black. So this is nicely cleaned up for our benefit.

Thank you very much Max Talk And if you thought the last one was beautiful, look at. This is a stunning, absolutely stunning photo. Thank you very much! Justin Bell Who set this one in? Once again, it's an IGBT are from a Schneider Electric Altivo 71 which is a free three-phase synchronous frequency inverter up to 630 kilowatt job. and this is the magic smoke actually captured, actually captured inside the gel.

As I said before, these IGBT is usually exposed dyes as you can see there and you can see the bond wires going over in its the top. IGBT That's um, had the magic smoke released and it's been captured inside this gel and it sure what sort of what sort of goo gunky gel it actually is. If anyone that knows, please let please let us know. But look how perfect is this? We've captured the magic smoke, the active ingredient in all components that absolutely wins the award for best photo so far, no doubt whatsoever.

I Find it absolutely fascinating how it's like layered like that is that you know it's some sort of I'd love to know the physical process involved in that of this, the energy and the smoke being you know released inside this gel and this layering that takes place. but it's absolutely beautiful and you can see around here like something's happened to the gel there. Obviously some sort of you don't heat effectors done something to it. but Wow Does it get any better than that? Next up we have a submission from somebody who called themselves D Co weed.

That's all they identify themselves as. So Okay, fair enough. The Hurons D Co We've this is a MST seven hundred volt triac and check it out it is. Yeah, The leads been absolutely blowing apart, the board has been burnt.

a huge hole burning the board. Absolutely classic. And an interesting part about this photo is look at the tea. Two-twenty look at the leads.

It's lifted way up off the board and you can see that with the white thermal compound behind there. And it's because there's no bolt in this thing. it's just got one of those are brass retaining Clips these are, you know, fairly common in, you know, cheaper kind of our installations. They're just easier to install those than a bolt, but it's actually propelled upwards.

so whether or not aren't physically move that upwards to get a better photo or whether or not that was part of the fault event actually propelled the thing upwards. I Doubt it though. I Think it's probably been manually moved upwards or in this case it come came from a DeLonghi coffee machine. I Mean you might think, well, there's something wrong with this De'longhi coffee machine.

What happened to it? Well, let's have a look. wha-wha That is what you think it is. It's a cockroach. Absolutely fried itself.

Well, the this thing was actually on. and wham-o? The magic smoke released from not only the triac, but for cockroaches. Well, gave him a hell of a fright. I'm sure.

And the thing is, anyone is used to repairing stuff or you know, taking a power part old stuff. It's very common to find our failures like this getting themselves inside equipment cuz a lot of these creatures like the warmth of the equipment's on. the crawl inside and yeah, sort of bridging the wrong tracks. and yep, that's what happens.

Oops. Next up, we've got one from Dexter's labs. thank you very much. Dexter's Lab Um, this is a Mag Stem 200 transcranial Magnetic stimulation machine.

It sounds like one of those, you know we were machines but no, it's not. This is a genuine one designed for at neurological research. cortical mapping if you know diagnosing nervous disorders and things like that. So this is a legitimate bit of kit.

You know it's a lot of engineering which goes into one of these anyway. So there's a whole Bank of these power resistors here. And yeah, they're huge Monsters are they're not attached to any heatsink. So I assume this thing's got fan is a fan in the back there.

you can see the fan so it's got air flow. yep in that position. So it's got air flow over the resistors and look what? Watch as you can see the central rod inside this thing. The the ceramic on the out side of course is just aid in the power dissipation of this thing.

Of course, it doesn't do anything for the resistance, it's the wire wound resistor on that former inside the thing. But wow, there's a whole bunch of them. They're all in parallel. You can see there, you can see the traces on the on the bottom side of the board like that.

So they're all in parallel. And it's interesting to note that the ones near the middle near the connector have fared worse. But there's one right on the outlier, so there's extra resistance in the trace going down to that one. So it's interesting that that last one has cracked a ride open and these three here all intact and then these three are dead.

Anyway, it's surprising that we didn't see any burnt tracer than everything. You see the fiberglass structure in there that when you know if our four fiberglass R-class PCBs burn like this. They're woven fiberglass, so you'll often see the woven structure inside these things. Well look at that.

That is serious business. Just absolutely shattered and cracked in half. and that's the backside heat pattern there. Obviously there's a bit.

the main part is around here, but over here as well. So obviously you know that the power wasn't equally shared among these resistors. So that's you know. rather interesting.

But these power resistors are like, you know, usually five or ten percent tolerance anyway, so it could have just been. You know bad luck that these ones here happen to be. you know, lower value than the other ones and handled the grunt of the power dissipation there. B And you can see some of the lemonade around here.

You can see the central spot where it's the main powers being dissipated, but you can see then that there's a radial pattern around that and that's probably like delamination caused by the heat spreading out. They don't call these if I fall laminate for nothing and last up here. we've got one from Eevblog for a member. Brumby Thank you very much.

Brumby As you can see in the file name here, it's from that Jake Our warehouse clearance sale and this was from a line interactive at UPS like probably while these no neighbors and we've got some FP Fifty No.6 is here. These are 50 volt and sorry 60 volt, 50 amp um end channel power MOSFETs And oops, they've just been blowing apart. Absolutely. the case.

Just absolutely blown to smithereens here. This one over on the left here looks like it has, you know, suffered a bit more in terms of actual flame, but it is a great photo. It's just an absolutely brilliant failure mode. So yeah, I think this one actually had some more flames associated.

This one here. it's just had the ass blown out of. You can see the you can see the die inside there and just half the cases just blown off and this one is still hanging by the lead good on your leave, still hanging in there. But once again, you can see the die inside there and that energy has to be released.

That magic smoke has to be released somehow and it manifests itself by probably the weakest, you know. or some minor imperfection in the molding, the the over mole, the plastic and capsule and over molding on that. Probably you know, the weakest point of that just started to form a crack and then within half a millisecond or something. Boom.

There it goes. And you know then the amount of energy released in something like this is just ridiculous. You know, even thousand watts or something, which doesn't sound like much, but if you dissipate that in a tiny package like this instantaneously, then yeah, you're going to explode the case apart. You know, even these are 2o 20 to 20 cases.

They're You know, they're designed for reasonable power handling, but even with all that heat sink in there, that's not going to do any good whatsoever for instantaneous overloads for whatever failure mode this particular one is. I Don't know. it might have been a line impulse or you know, something like that. There wasn't any adequate input protection or enough input protection.

and then it just starts short of these babies out and Wham and you can see that You know usually its gate. the left hand pin that pin one, he is going to be the gate and then the drain and source are going to be these two pins here. and Mac Look at that. Wow So there you go.

I Hope you enjoyed those photos. Some absolutely brilliant ones today. sorry if you sent one in and I haven't got around to it. The link is down below to email them to me.

that's the best place and they go to a magic part of my inbox where I can then take a look at them later. So hopefully if you like this, please give it a big thumbs up. Like the concept of evey smoke, give it a big thumbs up. If not, give it a big thumbs down.

have enough people thumbs it down. I'll stop if enough people thumbs it up and view it okay. Doing it catch you next time you.