Big Clive Edit

A complete copy of the datasheet example schematic of the.

A DI ADA for reminding me that these things exist because sadly I've come across these in the past. They've been around a very, very long time. It's obviously a lucrative industry making.

A milliamp hour times say 3.6 volts for the lithium cell inside.

A Phillips bit in a screwdriver sent me by Phillip. That's nice.

Actually bridge one of the greener yet yellows down to the negative rail and that basically enables it because up to that point it draws virtually no current, well, no current measurable current.

Ah yes, eBay yields the goodies once again. And this time.

All flashing at once, which is ohh no and ramping. I think that's the old patterns thing. Ohh it is yeah. Hmm.

All the connections seem good, it's just not doing anything. Well. It is actually getting slightly warm, but nothing really radical. And if I bridge these two connections here?

All the merits, just part of a soldering station.

Also notable that it looks a bit mashed down here because when I first opened it up this wire was right across here and it had been mashed during manufacture so.

Also, it's a big splash of solder across some pins here.

Although, having said that, when you let go of the button, it's not really going to do that, is it?

Am I right here? No, actually I'm talking crap. The fuse is actually in the live. This is good.

An S. 8.

An unexpected communication that did answer that question I had how did does it monitor that? How does it?

And 2nd Array primary of the two high voltage Transformers.

And also communication via 22 pins.

And and it when it drives this transistor it doesn't just drive the relay, but it also drives that red LED.

And another thing you could do, the black lead that goes out for the touch sensor. You could put a resistor, another resistor or another capacitor in series of that.

And any LEDs, and yes, there's an LED above and below, so you'd expect some LED activity. We'll tell you what.

And as it is the secretary it, I don't think it has a I don't think it covers the full sound wave. It's the lamp is never really going to reach full intensity, I don't think, not sure about that.

And current can flow through a MOSFET. Now direction. The issue is that diode.

And each processor is powered by its own voltage directly to from its own battery.

And here I was out by three decimal places. So sadly, this power bank will not actually run your top of the range Tesla for a year without charging.

And here's the odd thing. There is a pull down resistor to make sure these Mosfets stay off.

And I also to send a signal over to that to its switch input, to tell it to wake up and actually turn the sort of battery level indicator lights on. Let's bring in the schematic.

And I focus it to a more appropriate position.

And I think I'm going to try and depot this.

And I've found it. So let's see how easy this is to open without bursting, because will it be glued to shut? That would be annoying.

And if I plug in this little air tester here. We can test its output capacity from port.

And if I pop the cover off.

And if I take this out, because it was originally potted in with a sort of silicone rubber, where is it going to come out now? It is a fairly tight fit.

And if the voltage across this cell reaches the upper threshold, it could be just above 4.2 volts. This MOSFET will turn on and it will effectively shunt this resistor across that lithium cell.

And if there's current flowing through the circuit, say the trickle charge at the end of charge, it wouldn't deal with amps, it would only deal with typically less than 60 milliamps. But if.

And if you consider if you had a load connected to here supporting you had a lamp. Oh, that's very old fashioned.

And it also creates an absolutely minute trace level of ozone that helps freshen the air.

And it monitors the voltage across the cell of the 471 resistor and capacitor to provide filtering so it gets a nice stable reference voltage.

And it provides a thermal barrier. Because this little chip here does give off a bit of heat while it's charging, it acts as a variable resistor.

And it then goes to the circuitry, which is just gibberish. It's nonsensical before it goes out to the ion module and unfortunately.

And it's a very classic. It's got a.

And it's associated with resistor and this one for the timing which will change the sort of intensities.

And it's got the little tiny relay that they normally have. Let's get this out. If we can get it out, the whole hot comes out. That's pretty good.

And it's notable that it deviates from their specifications again.

And its application notes suggests that it could be used as part of push pull arrangement.

And maybe brighten the image up because it is just a bit.

And no continuity in that one. It's not doing anything right. Tell you what.

And now I'm gonna stick. This.

And one is sparking. You're probably not going to see that yet. Uh, you touch the other one and the other one sparks, right. Tell you what, I'm going to turn the light off. One moment, please.

And pins are two and three are for the crystal, which is probably 32.768 kilohertz.

And resume, here is the circuitry.

And so here's the bizarre thing. They've got the case, they.

And take this apart, because that's going to see. I can already see looking into it. I mean, let's take a closer look just through the shell.

And that can be quite a lot of heat if the charge voltage is high and the.

And that goes negative to light that led. It will also light that led, but that's.

And that is basically how to turn garbage.

And that is it. It's quite a good result, I'd say.

And that is it. So there we go. I do have another tool on order a faulty 1, which is good. And so once it arrives it's the 20 Volt tool.

And that is it. There is nothing more to say.

And that is more or less it, so I'm going to.

And that provides power to the chip. It's very low current. It's interesting to note that that.

And that their life is definitely live, because otherwise it may not work.

And that was fairly easy to open and I think you will agree, let's pop that. Well, let's not pop that out. Let's put some isopropyl alcohol in.

And that's between the two ports. So don't go plug in one AMP devices into each one, otherwise it will be sad.

And that's not bad. It's holding 5 volts at 1 amp as we go to 1.5 amp.

And that's not what's in this, though. And but it is along the same lines.

And that's what happens. The gate of the MOSFET is normally pulled to the 0 Volt rail with this fairly high value resistor.

And the circuit board in output, where is it? It's somewhere here. It's quite nice. It's got 2.

And the circuit board seems to have quite a few components on it, though it's got a very odd layout.

And the high number of beeps there meant that it was out of compliance because when you plug in a lab that you've programmed it for like this little one here.

And the joints have been reflowed. Some tests have been done.

And the little chip, the little module is ESP.

And the negative goes straight to the driver.

And the negative is connected to the end of the lithium cells via 2 Mosfets. This is a very common arrangement.

And the negative is that the other side?

And the other two are wired across it so that by swapping the polarity, it can actually light individualities. Technically speaking, that means if this one's positive.

And the solar cell also has its resistor 2K and an LED just to say I am charging. Well, there is light in the vicinity. It means nothing really because it's such a tiny solar panel.

And the switch here. This is a switch which links across.

And then it just goes in parallel to the speaker connectors, your output probes, your little socket and then all the lamp holders.

And then looking through a suitable magnifying device.

And then the other connector is just connected to the other ones directly. There's no high voltage structure in there all. Is it actually even connected to anything?

And then we've got the control circuitry here. One other thing worth worth noting is this.

And then, bizarrely, just one connection.

And there is the little switch contact here.

And there is what appears to be a reset circuitry circuit here, which is useful to know because this may well way of rebooting the pack which goes to pin 4.

And there's a 2 megohm resistor just designed to discharge any residual charge in this capacitor.

And there's a decoupling capacitor of roughly 100 nanofarad emerged in circuits that's not guaranteed across the two pins of microcontroller. And this is a classic pick 12 pinout.

And there's also this resistor here which limits the current and the feedback circuit and the little 2.2 nanofarad capacitor.

And there's definitely no ionization going on. Not unless you touch it, in which case it's you who will be ionised.

And there's one of these across each cell.

And there's the button that is signalling to the microcontroller, so you can click it to actually wake the unit up or go into the various LED modes.

And they've gone to the effort of soldering them onto the circuit board and the wires. They've got this circuit board made with all these useless components.

And this is the secondary. And in doing that it would start this, it would start oscillating.

And this resistor isn't really worth changing. This is the one that used to get the reference so it knows where the start of the sine wave is. Let me bring in the schematic.

And this thing is used for testing lamps. Let me demonstrate you turn the power on.

And to avoid epileptic things, I'll do it with the lights on, so off.

And try and roughly align that chip above that gap. So there's a bit of.

And uh, yeah, it's a nice enough case.

And uh. When it did that, it would step the voltage up and then charge this capacitor with respect to ground. But there is no direct ground connection until you push one of those buttons.

And um, yeah, perplexing. So perplexing. And.

And using it to probably buffering it up with this trip here. I would guess I'll double check with that and see if I can find any information on it.

And we'll stick it on a meter and we'll plug it in and we'll see if we get voltage across the output here. One moment, please.

And we're going to sort of the negative connection of the battery pack on 1st Curly here.

And we've basically a standard feedback that orange indicates one transformer, that's the little transformer.

And we've got the spot welded tab.

And well, it works.

And when it gets even lower, it will go below this, you know, voltage, and then it will just be the lowest one, and that will show you that it's time to recharge the battery pack.

And when it turns it on, it just brings the LEDs on and goes through its modes.

And when you turn on the light, it actually puts power out to actually power the LEDs directly, but it also.

And will probe about and see are we getting.

And you can just shove lamps in.

And you see the larger protection circuits are the balancing circuits. It's basically the same circuit, just repeated over and over again all the cells in.

And. Because I it it's the other way round from the picture I showed you the positive.

Anything else here, that is it. You could play around with these values. You could play around with that value.

Anyway, here is the reverse engineering of the unit. That is the back of the circuit board flip.

Are these little screw holes? See if we can pop the plugs. Oh, it's got a compass, by the way, just in case. Because, you know, eat your heart out. Google Maps.

Around that it's gonna restrict that a bit, but if the chip gets too hot it will self regulate.

As as does the power and then output goes to the LED's via that resistor. And here is the truth table of a very similar classic H bridge.

As well as China, they might allow such things, but uh, it's definitely.

At an example of this and why it may appear to keep charging but doesn't keep charging and I shall zoom down a bit more on this.

At one moment please.

Ate 2.

Average warm white OK, watch your eyes. The light is coming back.

B2B P/E KH but on the other chip, the slave chip, it's B2B7 ekht and that makes me think, well those didn't come up in a search so I'm guessing that those are.

Balancing circuits to actually control that it would with that lower currency a cap of.

Batteries are low, so I'm going to.

Be some sort of step up circuit if it was low voltage and it is a step up circuit for low voltage.

Because effectively, as soon as it reaches the full charge, it cuts power to the cells so that.

Because I've resolved these bars if I connected this across 3 volts.

Because technically speaking, when you apply a positive signal to activate this MOSFET and measure the voltage say across the first cell.

Because they look like they're detachable. Are they trim or are they part of the thing that holds it together?

Because ultimately in most applications it's treated as just one battery. SO1 thermistor would have done.

Below 3 volts, about say about 2.5 is the cut off point for the DW1. It uses this MOSFET package to switch the output off.

Better. Yeah, but that is it. It is a.

Big Clive - Gangnam Style

Blue, grey, orange, 68368 thousand ohms.

Buck regulator chip, there's an inductor, there's the output capacitor for the power supply, and what it's doing is it's measuring the voltage drop across this current shunt.

But anyway, there is.

But as well as being able to alternate between the two thermistors.

But at any time. You can plug in your.

But by basically controlling the two Mosfets, you basically block current flow in either direction.

But by turning this MOSFET off, it will block the discharge. That's why this one is marked as the discharge prevention MOSFET.

But either way, it's a solid 23 package. It's a 6 PIN package, but it only uses 3 pins.

But having said that, it's just, you know, it doesn't look a hugely expensive device. So the answer here is.

But I don't think it would really be compliant with American, European, British or any other regulations maybe in India.

But I'm getting the feeling that the the main brain of this unit which is a little there RF receiver board.

But interesting stuff. So that answers the question. I've looked at these circuits and I've always wondered.

But it could also potentially see a slight jitter on the analog digital converter through this, and it's possible that.

But it would start charging that capacitor up until this sidac.

But it's connected to neutral so it can tell when the side wave has gone.

But it's interesting, the data sheet shit. Well that's wrong. The data sheet for the T6 or 61A.

But it's the fact that the speaker terminals are not compliant. The probes are just ridiculous, but hilarious at the same time.

But pleasingly faken away actually quite enjoyed taking that apart.

But still probably worth experimenting with.

But that is another electronic high voltage eBay special deciphered.

But that is how it works. It does require a bit of intelligence on the charger side or that sneaky resistor which I think would work.

But that is it, a very simple circuit thanks to this chip.

But that is it, so if you need.