 Hi guys, I hope everybody's okay, and I'm just going to share a quick little, I've just been playing around with this because There what we got here is I've got a little AC transformer It's only a tiny little thing. I don't know what the output of this would be what the VA it would be But that's coming on to this now the blue ones just there because it's a south center tap We're not using it. So we've just got the two altars, which will give us our voltage here And if we take a quick peek at that, let's get this meter into shot We can take a peek at the voltage there again onto the AC side there. I hope you can see that Yep We can take a peek at this doesn't matter which way the probes go in Pop that in there pop that in there Like that just put this down And what we got is we got 10 volts a see And you can see that there, and I think this is showing us the Hertz at 50 Hertz Okay, so that's what we got going into this circuit now down on the Down on this here. You can see the output of this circuit which is coming from this five volt regulator LM7805 Now first of all, it's going to go through the circuit again. Let me just pull that off there and I don't think that's got a very good connection Into there as you can see on the oscilloscope there as well that we got our DC We're actually run that's 500 Millivolts per division here. That's why it's actually it's offset down here You see a five volts RMS there. It's actually at the top We see it says 4.98 there as close enough So what we're doing is we're using this full wave full wave rectifier So we've got our AC coming in these two yellow wires here are that are AC So when it goes high, we're going to be going through this wire through this Out of there Coming along this wires are positive Going into the positive side of this capacitor And then it's going to come out the positive side here into the input of this voltage regulator Coming out of the output of the voltage regulator through our load, which is this device here. This DC load back through back through here, and then we're going to come back through this part of the The neutral back through this diode here and then back to source And when it's doing the the opposite side The negative side because it's going to be flicking from so we've got our positive here negative Then it's going to go positive negative positive negative. I'm going to do this 50 times a second. It's the 50 Hertz thing And then it'll use the other two diodes to go back round So yes, we got a little regulator now what we want to do is just see how much current we can pull through this Before we start losing our nice DC at that side So I'm going to very gently Just turn this up. We're just going to Just go up bit by bit bit by bit I'd say what we could do as well. We can leave these in here and just keep an eye on what's going on If I just move these around either way round And we can keep an eye as well on what's going on With With the AC Yeah, well, I know that's going to make it a bit difficult, but the entire line You'll see here that you probably can actually take that up in our position and put it up here That's there. We just put it there. Okay So we can see that a bit clearer. Yeah, we can all right So we can still see that we got 10 volt on the AC and we're still going to just be turning up this load We just want to start just giving it merely milliamps really Or at least tens of milliamps. So there we go. Oh Look at that straight away. You can see over there. That's terrible. So let's just back that off until we get Back to DC again. Now that's we got 50 milliamps. That's 80 milliamps Let's just back that up a little tiny bit more See what we can actually get out of this thing before it starts looking Pretty awful. All right, so that's 60 milliamps. I think we're going to be able to rest with 50 milliamps About there So we got our AC back again and you can see here look that the voltage is dropping Now the problem that we got with the voltage is dropping is that this regulator isn't going to work very well at all Because the regulator needs its own voltage to work And I believe with one of these you could be looking at like four volts But We're hardly pulling any power through an amp you're probably talking that sort of voltage That's why it's always going to be higher going in Little bit excess to spare Now one way that we can make this a little tiny bit better not much Is if we add a bit more capacitance here, if I just switch this off like this I'm going to pop this capacitor out and this is a hundred nanofarads micro farad sorry Capacitor at 50 volts and I'm just going to chuck something in a little bit bigger I've lost it. Oh here it is Now this is 680 Micro farads it doesn't matter it's only 35 volts because we've not got anywhere near that kind of through here So we've got the stripe end down to this negative I'm going to pop this in here And then put that circuit back on and if you remember we'd already seen we're seeing little little lines coming down Where our AC wasn't behaving like a DC wasn't being DC anymore and automatically we've cleared that We've got rid of that so we can try and tweak this up a little bit more and just see oh and we've got 9.3 volts on The AC side here. I'm only gonna move that in so I can see we better because on my screen here I've got the controls and it doesn't allow me to see What's going on there? So I just tweaked that a little tiny more. Oh Look at that. That's 220 Micro milliamps So let's go back to this. We've got 150 milliamps at the moment and we've still got a nice signal there Nice DC straight line and then if we tap a little bit more of Just that extra 30 milliamps has turned us back into a Bit of a horrible looking DC very horrible looking DC. So we just back that off a little tiny bit more Put that back to about 130. I think we can go 150 It's very sensitive this All of that looks 170 and I think that's the tops we're gonna get because that's a 180 I mean that we dropped out and look at this look we're dropping down to a volts, which is probably the lowest that you want to be Trying to get this to work Because you want to you want a few volt overhead And as we're losing voltage anyway from our main supply from the 10 volt because we're gonna have to die out on the go We're gonna drop there We're gonna drop like 1.4 volts Because of the forward voltage of 0.7 on each diode We're already using two diodes at a time when it's positive. We're gonna be using two diodes when it's Flipped over again We're gonna be using two diodes and the other two block So that's pretty good like that But what happens then because I think personally what it is now is that this is Doing it's utmost and it's straining itself and it can't really do a lot more And that's why we're gonna see this dropping down and so we're gonna quickly change over this for another Transform a slightly bigger to see if it makes much difference. So let's just pull this out Pull those out of there Twist this Twist that a bit Just move that out the way. I can't remember where that transformer came from But we've got a slightly bigger one here not particularly too big It does tell us where our primary is and our secondary So the primary area of the reds and our secondary here is Is the blues now this one says it's 12 volts with a 20 va voltage amp Capacity So this should do better. I mean it's physically bigger anyway This I think came out of a radio because it's got a can around it But this is physically bigger. Now these just come out of wall warts You know the things that you plug in the wall, but the heavy ones not the lightweight ones They're switch mode, but this is actually a linear supply. It's a Good transformer. I'll show you some how it should do with a couple of these In another video, but let's just plug this in here plug this in here Just pop our wires. I think we can just drop these straight in the top with these Because they're a bit thicker than the other one Put that in there with that and again, we're gonna put our probe our probes to the multimeter in there as well I should probably Pull that a bit further forward. Oh, I think I've actually broke One of the yellow ends doesn't look like it's got the whole thing there anymore never mind and we'll just pop this in here There we go and hopefully That's gonna give us some out there now. So as we can see here, there's a AC voltage and We're not going to see our DC voltage as such because I don't have anything else connected to show it But the DC voltage will actually be higher than the AC voltage if we looked at that now that's Unloaded but let's just say If it was 12 volts at 50 Hertz and then we times it by 1.414 It'll tell us what the DC range will be when it'll be on DC. So what we want to do now is we're looking at Line there on the oscilloscope our DC And we've gone automatically in with the same value as what we had before I'm gonna take this out. Let me just undo that for a second You don't have to do that, but I'm just doing it anyway because I think it might just be a bit nicer on there on them we're gonna go straight in with one of these a Cheng Chins wing or whatever. How have you pronounced that? It's a 50 volt 100 micro farads It's gonna go and pop this in first They call this a Like a reservoir capacitor because what it's gonna do is When we first have our DC We've changed it to the Z it's gonna be rather than going up Positive down to the zero and then down negative back to the zero of them. That's one Hertz one One wave one I don't know what you call it. It's in the comments. You can really call this Yeah, I'm not gonna stir with it What it will do is rather than it go up and then down it's gonna clip off the bottom one and put the bottom one basically at the top Yeah, so we're gonna have this In effect, but there's gonna be gaps in between as it goes up and then down there's gonna be a little space in between there And that's what's gonna cause they're horrible that you can see on the screen So let's just put that down. You can see it as it goes up like that Now for some reason we seem to have quite a bit of mess there. I'd say that maybe this isn't Incorrectly Something's not incorrectly there. I think we've lost No, it's just pins all bent up Let's just put that in there like that And like that And now what you can see here is That we have to turn this down because even that we're moving around here a little bit but even at this we can see that our Reservoir Capacitor just isn't big enough before I turn this down slightly how it will clean up But that's no good to us because we've already got 130 milliamps That we can use and we got this good AC voltage there. So this has got plenty of head room for You know to be able to do this conversion and give us this nice Five volts on the output So let's just pull this back up again, and we'll take this out and we'll put in the bigger capacity capacitor Pop that back in again between make sure you get the polarity correct on these because they don't like it when you're Do it the other way around and we're gonna run straight away from what we had before And as you can see that DC goes up quite nicely We're still gonna have 12 and a half volts there. We're gonna just take it up slightly 1.8 250 milliamps 310 milliamps This is looking good maybe 400 milliamps there We've still got 12 volts on the AC And that's with a little bit of load Now let's go a little bit higher so it's You got nearly half an amp enough for this to start kicking in now I can see Automatically there's a little tiny bit of noise in there We're just there We just started to put the noise and we've dropped down a little bit on our as we're loading up this transformer That's half an amp again out the transformer Which isn't a great deal. I mean it's only two and a half watts It's not a lot at all really isn't But if we just take it up a little bit higher, I'm gonna keep doing it now so I can see Over there on the oscilloscope There we go And here comes our noisy signal Just back that off slightly Get off so it's all usable In DC what we got there. That's not buggering because the maximum we can pull out of that is one amp He's one up and there we had 0.82. I'm just gonna check your temperatures. Yes, that's getting warm now What I'm gonna do now is just so you can have a little look at what this would they call it It's like avalanche when a temperature gets that warm that this will start cutting itself out So we can see it goes straight into 8.2 Zero eight point eight point four there. So, you know we're eight hundred Eight hundred milliamps. Now we should start seeing this shut down as this gets higher and higher in temperature I really wish I'd have probing it. I almost think I can smell it There is a little heat shield on there heat sink on there But it's not really gonna do a great deal, especially as it's lowered down there But we could actually turn this up. We've dropped down here and our voltage a little tiny bit But over here it says we're on four point seven six volts So we don't need to be too Too worried about that Just turn that up a little tiny bit more. So what I want to show you I mean, this is the maximum this actual transistor can add this regulator can run at and What we're doing now is you're gonna see this this should start dropping down as that gets hotter and hotter It should start dropping down But we don't really want to damage the device We just want to see what's gonna happen. It's still got eleven point one volts there And if I just turn this up a little tiny bit more Really really peak and it's Absolute maximum Okay Absolute maximum. Oh, and we've got a horrible snotty look over there Look at that. Look how the the voltage drop down. You see it drop down on the We need to let that cool down now. I'm gonna back this off. Oh I'm gonna back that off and what we got to see there was the actual device just saying that that's it I give up They could have been a little bit from the transform, but that's not warm at all But that's gonna be piping hot absolutely piping hot. Let me just see what can find a K-type New I had one earlier cause I was checking that temperature of the room and we just Stick that into there and put that across there So this is the room temperature around about this and we're just gonna pop this on to this We're gonna see the temperature of that Look at that. Oh That's warm. That's very warm So we can get to see why that device may break down Because it Very warm indeed Very warm indeed, I think we can sort of say about 84 there we peaked But it will be coming down bit by bit of course because we're not putting that power through it anymore But I just goes to show One that It makes a difference what capacity you use for your reserve for your reservoir. It also makes a difference Let me just have a little It'll nose at these diodes I think they're capable like their iron 4004s But again, they do get warm And we get one I'm sure they've been warmer than that If I first put them on there, let's see what this has dropped down to now. Oh, we're still up in the 60s. That's for sure Still up in the 60s, that's for sure. So, um, yeah Let's get me twiddly back. Oh come here So yeah, I guess show one that you overheat these too much it will break down and I'm pretty Confident that the device will work again And if we don't have enough reservoir That this device doesn't really need a great deal you can use this like this. I Think I Mean there are some ways you can add more protection using diodes to ensure to be short the out the outputs You can have a protection diode and we can run that from the from the output background to the input But it does make a difference what reservoir capacity you have there You're a smaller one and he won't do the jobs as well. And of course if you have a too tiny Transformer like this little Pikachu thing and too tiny transformer, of course, that's not gonna work very well either There you go. That's just like a little play around with that We're gonna do the same sort of thing again in another video with another 5 volt regulated supply Which has got a bit more complexity to it And we're gonna see how that fairs because that one we're actually using a He's a lemon LM 25 59 or something like that and that's a three amp output device Natural valve we might play around with some Three amp output devices regulators as well for this and just see how well we do that and how much we're gonna need as a Reservoir, but it's just a quick little video. I'm just gonna do group of these type of things Just playing around we also get to see a course on your solar scope where we actually break down a nice DC line into that horrible EC rippled Effect that we really don't want our outputs All right, thanks for watching guys and I'll catch you in the next one