 There you guys Let me take this off here That's that's a pre-made this is a Little power supply this little transformer or plug into This is this you can't see it We do a plug into the mains anyway I've got a special block fused connector block that's I can just shut it into It's there Got the light going on the moment as soon as you lift that up it cuts the power And you can see inside there the fuse and such You can see that down the back there see the fuse yeah You'll need a little light so you've got power. I'll put it back down again though. The other light comes on in the back up Well, I wanted to show you was this little This is the first little power supply built that's a light actually the first power supply built was a high voltage one Which is basically a flyback and a driver This is a little nine volt regulated power supply Power comes in from the mains and the transformer here It comes out about two I think they're two seven volts or two eight volts One coming off each side of the center tap and the way I've been using it is to forget the center tap And just go on there. So I've got like 14 Forget the center tap and I've got the sort of 14 volts both these together It connects on to each side here of this little bridge rectifier It then goes through this smoothing capacitor then comes out the smoothing capacitor Into the regulator lm7809 And then I can I can tap on to it. Yeah And that's all well and good that I wanted to build a little power supply last night That would power, you know, me little Jacob's ladder there. So I needed at least 15 volts And a few months to do what that's doing at this moment in time You actually get a bella deal out of this. I don't know if you can see my coils there Um, I'm taking off I just want to see what this one here look One me and I've taken off this I've taken off this because It would get really warm I mean it would get really warm that I couldn't just leave this thing running I mean this has been running for hours Um And it doesn't get warm I can put my things generally back in there and that's just, you know, slightly above room temperature And the reason why that is is because I've taken this off I took this off and it's made all the difference And there it is Uh, just in case anybody was wondering, you know, if that actually does make a difference when you take it off It does the end reasons on here is to keep these two pieces together because I'm going to use this to one my own turns around But I want to do it so I can take these off and put them on nice and easily And when I've done it I'll just put some tape from here across here To keep this together when I put my My turns under here seven aside Or on this particular flyback This one up here It's six aside Of the center top And you also get a better spark Uh, or a better, uh, this If you put a bit more capacitance on Like there, I'll just press that on It's a little bit, I'll turn it off You see It doesn't like that particularly Oh, can you actually see what I was doing? Probably can't I never put this one on as well There you go You can actually see that sort of heat up and get a bit warmer as I put that on I've got to start it again Anyway, back to the power supply thing Let's just jump right on Can't be wrong, very good on the box Anyway, so there we go So we've got this little one A little transformer there And we've got this little, uh This little, uh, power supply Yeah It works, it's great I've been powering up little amplifiers with it Um, and it's great But I need this one a bit bigger to Just power that thing up there So, so we're going for this This one's a bit bigger This is, uh, MIT transformer As you can see Put the AC Connected the AC mains onto these Doesn't matter which way around they go I checked that there's no continuity between any of these terminals And the case, that's a very good idea to do that And then I gave it I think there's about 18 turns in here 16, 17 turns, maybe I can't honestly remember exactly how much I'm trying to count it There's about three rows of six That's about 18 turns You want to take one? The cardboard's jammed in there just to keep it all nice and tight And it doesn't really homo anything When it's pulling like four amps You can hear it very slightly We have to listen for it You can't have anything else on the background I'm quite happy with that I've got a little bridge rectifier This one's, uh This one's in a, you know, just a chip Basically Two inputs and then the Pluratized outputs Now I've just chucked a couple of these capacitors on there Just to, uh Just to try and clean out some of the ripple Of it, but I'm not even, uh, Checked it, I mean I connected it to that little Jacob's ladle there to that You know, to that up there Uh, SD And it was fine Absolutely fine, the only thing I did find Was the, um The rectifier was getting more But there is a hole in it So you can put it onto a heat sink And I think that's what I'm going to do Um, but I was going to consider Taking this apart again And just using this length here That was one side of the tap And I found another length of this Cable, which is in brown Just the other part of this That came out of a, just a bit of normal Flex from a vacuum cleaner An old vacuum cleaner It was irreparable Or non-economical repair, I should say Everything's repairable But over it's Economic to do that Yeah, so, there we go Just thought I'd share that Very easy, I've been a bit Reluctant to make this one Because it's playing around with the mains Of the volts and You can kill it, obviously And you don't really want to You don't really want to do that You know Because it'll knacker up you doing your next project Hehehe But, yeah So, nice and simple It gives me, I'll tell you what it gives me It gives me 20 volts, it does drop down a bit When it's trying to pull like 3.5-4 amps Pulls down to about 13-14 volts Um I was getting an AC 15 volts By the time I've DCed it, I'm getting like 20 volts Um So, it'd be nice to see what I'll get With A sensor tap And then I can have a plus-minus battery That'll look pretty good I just thought I'd show you the The source transformer here It's connected up To this 240 volt Used This is Core 20 years ago, I think it was I bought that Just for something else Well anyway, so what I'm expecting to see Is about like 7 volts each side So about 14 volts on the meter Still onto AC Just Put that down That gives me power output here I'm going to stick one connected to there One connected to there I'm putting my thumbs On the ends of this I wouldn't normally do that With AC mains I don't think it's scared I just respect The fact that it can kill my ass I'm not ready for that just yet But anyway, so as you can see Look on the meter there The top Reading shows it's 50 hertz And the bottom reading Shows me 14.2 volts Absolutely brilliant That's just exactly what I'd Expect to have it So now I'm just going to Connect that into this little power supply Like I say It's a 9 volt regulated Using the 7809 I just put that in there Pop this I have to put it to the inside So I can Sockets Connect to that side Switch this to DC Negative positive output There we go 9.2 volts Brilliant I don't actually have anything I can really put on Just Straight away If you look at my NM386 amplifier Video that I built I'm using this to power it up with And it works just fine It works just fine, lovely Absolutely lovely I'll put this one on In a tick Just bear with me So what I've done is I've just connected this up This side of course is Polaritized This is coming off Once it's DC And it's polaritized And what I've done is I've sent that Up to Up to the Jacobs ladder So in a second you're going to see this working So yeah I've left these slightly exposed So I can put the meter on And we can have a look at the Voltage And I've just connected This With these wires It doesn't matter about the color coding But they come around the back here Onto the connections here Which are live mains and must always be Keep that in mind This is live mains And it will give you Nothing else A very nasty shock So Let's flip The switch now I'll get a little bit of a blow So we can just get it going in a second And you can't really hear Let me just switch off that supply You can hear a little bit of hum A little bit of hum, but nothing So yeah, that's coming off there I'm going to let me just do a quick More Hammer, negative And you can see that it dips down 12, 13 volts I know probably Disconnecting The load 20 volts On the output Doesn't get warm Doesn't really make any great deal of noise Or there's actually Like I said, this rectifier Does get warm I mean, it's not warm now But if I were to be running that No, it's not warm now But if I were to be running that Like Jacob's ladder for 15 minutes Maybe not as long as 15 minutes But if I were running it 15 minutes And that needs to be Kits and I out I could probably If I had more capacitance On this circuit I could probably get more out of that Jacob's ladder circuit But there you go It shows I'm working and I don't see what else I can do With these transformers But cheers for watching guys And Yeah These voyeurs get very warm Because they're long and they're thin And I'm trying to pull Ampage through them And these These voyeurs are not really I'm not really designed for that They're just hook up leads For a lot lighter So you've just got to bear that in mind If you make stuff like this That your voyeurs There's another reason why I won't get very good output On that Jacob's ladder Because these voyeurs are just not really capable They're just silly little hook up things Something that's even thinner than this thing That's terrible, it's probably got Two strands twisted together And the strands being more neat But anyway, cheers for watching guys Bye