It's an LED lamp and it's our very favorite type. It's a dead one and this one is a very interesting fault. Let me plug it into this tester trunk. power on and it is showing two watts and yeah, do you see any light? hold on I'll turn the light off I'll take the exposure off and turn the light off and you can see it's barely flickering and oh oh, it's suddenly lit actually and now it's gone up to four.

Watts That's even better because before it was just getting red hot I'm not doing anything and it's just kind of fixed itself. 4.6 That's interesting. Okay I think we need to explore this one moment. please.

the oh no, no, there it goes. The light is about to come back so let's explore. I Shall Zoom down this? So uh, full disclosure here: I I May have nobled this because occasionally I'll see dead lamps and I'll say I Kind of want to find out why that lamp is dead so I nicked out a pub I cannot name which pop I make to out of it's okay. It was a good thing it was drawing lots of power and getting very hot and it wasn't doing much than we were producing light.

But now we're going to find out why it wasn't projection light. So I'm going to carefully peel this open with a pair of side cutters and so many things I mean the fact it just suddenly lit up there is new? Because it hadn't done that before, All it's been doing was just gently flickering the background so that makes me think that default has evolved. There is a capacitor in there that's interesting. I Almost wasn't expecting that because they leave so little space in these, uh, bases.

The SBC is small. Oh, SEC should I say small? Edison Screw that. it doesn't leave a lot of room for actual Electronics So let's uh, keep peeling this like a tin of sardines until we can get in. You could just fast forward over this, but if you want to, some people like it, some people don't.

Sometimes it takes longer than others and this is one of those times. it's taking a bit longer than others. There is a silicone sleeve here that's kind of interesting. I'm going to guess this might possibly be a linear current regulator, but I'm not really sure.

I was contemplating all the things that could go wrong. Oh, that's quite promising. That's quite promising. Or the actual circuitry is bedded right into that.

Let's even get this cover off completely there. The cover is off completely. well. the brass bit anyway.

Oh, I can see Uh. Smoky bits here. Is that possibly been burning? Or is that just a lamp cement? Oh, the lamp cement isn't usually that dark. Is it has it been arcing? Possibly there's a little wire going on to the side here.

It's quite a neat construction. The little silicon cap like that. Ooh, oh, it's all potted in with goo? Is it's supposed to be potted in with goo. it's actually just a little bit crusty.

I'm not sure it is supposed to be pointed in the goo. although that does feel just like standard sort of lamp cement. It's also not really. It's kind of like well packed up.

It should also keep in mind that this capacitor could actually hold a charge or into the fact that, uh, the light isn't working properly. What is all this white stuff? Is that more silicon or goo? What on Earth has been going on here? Is this part of the manufacturing? or is this just a huge mess? right? Tell you what. I Think we're gonna have to pause here to dig this all out and I'll be back in a moment One moment please and resume. And this thing is absolutely baked.

It doesn't just have lots of lamp cement on it, but it's also baked lamb cement. And they could put something big too. So when I be able to uncover some of the components and I've tried to clean them to read the numbers, I failed, but there was also a soft white putty-ish maybe heat transfer silicone or something in here. However, I managed to read the numbers on one of the trips.

Oh, incidentally, the lamp is currently running on a little roughed up. LED capacitive job power supply approximately 1.9 Watts It's worth mentioning that every so often it flickers. so I think part of the problem may have been a field LED because all these filaments all four of them do appear to be in series in here. so one field LED will effectively kill the whole lamp.

That's a shame when things like that happen right too. Well, let's put this up out the way. So I managed to uncover this chip. It says 85209-1106a It took a bit of detective what took a long time to actually work this out I'll just sweep all this crusty, crumbly, burnt stuffer off to the side.

but based on number of components, I was able to find out that it is a Vas1106a. Let me just bring this in so that's one one o' six A may have to tame this down to me, but let's tune it down a bit. Oh, that's way too much. but not to worry a little bit of Ripple on the lamp there.

not to worry. Um, and of the data sheet. Actually, you know what. Just give us a second.

could I bring this up to a decent proper intensity one moment. that's better. I'll leave this lamp shimmering here so you can spot it if it decides to flicker. So there were multiple options for the Vas1106a chip.

It's basically a dimmer friendly uh chip which allows you to put an extra load resistor in and it will switch that load resistor into actually keep a triactomor latched on. Um, but interestingly, there was also a transistor type component and this is also in this particular schematic and it is a Vas1101. Not much at one zero, zero one. Not much information.

I Found a Chinese data sheet and it's basically it's an auxiliary auxiliary linear current regulator that you can basically put it in series or LEDs and it helps soften the Ripple Uh, which could be caused by phase idle control from the Uh from a dimmer. so it's just basically just helping smooth the Led by regulating the current to a better degree and stopping it chop yawned off. Not that that should be too bad with this capacitor, but it can still potentially happen. Um, other things.

Yeah, all of these components were more or less component for component by account, including that diode. they were there, but they didn't necessarily survive being exposed. but this is the one that matches with the one addition that's got what I guess to be a 10 Ohm resistor which is also pretty baked and crumbly. Everything's baked and crumbly.

This isn't a surprise. the capacitor has seemingly survived to a degree. It's not puffed up, although it may have dried out because that's what happens when you put a big amounts of electronics and tiny little caps. But this is a valiant effort.

It's a company called Bell makes these lamps and uh, it's about effort that they've managed to fit all this in and make effectively a dimmable lamp that can actually be legitimately dimmed without too much flicker. That's not bad, dude. The Flicker at the moment is just because the crap circuitry I've got with it. but that is it.

The current set one and current set two. I'm guessing one is for setting the uh, the load resistor, and one of that's probably the load resistor there, and the other one is for setting the current that charges up this capacitor. Uh, but that's it. It's an interesting land, but was actually well worth salvaging from.

Its uh, its grave of being flickering gent in the background and dissipating a lot of heat. The factors dispute a lot of heat makes me think that that was that resistor and if that's the case, then that was dissipating. The best part of two watts in the circuitry I Wonder where most of that power was going because it certainly came up in the meter is two. Watts Um, but uh, who knows, Um, where it was being dissipated.

Certainly some of it will have been dissipated by R3 here, which appears to be the sort of the uh, the auxiliary load for latching on tracks, but that is it. An interesting lamp, well worth taking apart. It does occasionally flicker. it's just behaved itself inexplicably during the making of the second part of the video.

But this is the type of circuit and it's also uncovered that chip that we've found in other circuits, but not really known where it was. Now we do. It's an auxiliary current regulator. Quite a neat little chip.