 hey guys right I wanted to the other day you're gonna put this little LM 1875 circuit together and it works it works quite nice now I was running it off my little power supply there which is just switched off at the moment I give that little quick flick look I was I was running it off that but it's a single channel supply so that's one configuration for this LM 1875 but you can also wire them up in dual dual configuration so you got a positive like 12 volts let's say and a negative 12 volts now I've not tried one like that and I don't know I'm presuming it's gonna work better because if you've got a positive 12 volts and the native 12 volts you've got a lot more volts you know let's say you've got 24 volts let's say and that at the minute it would be splitting you know roundabouts or 10 and a half volts so I thought okay and there's a circuit pre-made in live wire which is basically what this circuit is here this is my one it is basically a copy of the one out of live wire I'm not gonna lie to you I'm not gonna say I just sat there and thought it up because I didn't but this is that circuit and the difference that I've made is I've not put the fuse in I did put the fuse in start off with and the double pole double throw switch I've left out as well just because well yeah good practice I suppose but just for me doing it and I spent hours with this last night playing around this with ours for hours and it kept blowing the fuses so I ended up loading up the existing the the actual live wire circuit and I put the faults and explosions on that it kept blowing the fuses as well so I put an ammeter in series here and it was like showing you know like 20 plus amps just just you know when you first turn it on just for a second I presume that's because it needs like an inrush current limiter and so I put a thyristor yeah I put one of those in and that get blown as well so I didn't quite know I can't do all the maps to work out the capacitances and work out exactly what it is it's gonna you know be doing so I just thought I'll leave them out and you know this it doesn't actually blow or anything and this is with the fault song and it doesn't actually blow it works away so I thought okay well I will make this and I got this far I made my little bridge rectifier I sorted out my toroid which I bought by mistake and finally I've got actual use for it because it's the is pretty much the same as as what's be used here 240 volts in it's got a 10 to 1 ratio so we're talking like 25 volts out per side it's this one basically is and it's supposed to be 24 volts a side this is but open so he's like about 27 yeah with no load on it and but that will work out to be about the same and so I've got myself a little bridge rectifier then this is only a lot one amp bridge I'm gonna have to dig out some more diodes and do a three amp I'm gonna this will deal with three amps on three amp fuse in my block connector and what they call them but it's a great great piece of kit and that's also got a trip behind it as you can see down there even though if I make myself part of the circuit it won't do anything it will just not fry me it will just think on the load but he has got some uses so I managed to I've got this far what I didn't realize was I got no negative regulators so I've got my 12 volt regulator there I need a minus tall regulator for here another couple of caps in and then the 5 volt regulator but I didn't really need the 5 volts I needed 12 volts anyway so but you see these little these little green capacitors these are 47 nanofarads these are 47 mic these are 47 nanofarads as per the spec on there we got the oh sorry no about the 200 and 2200 micro farads now I got the 47 nanofarads and then after the regulator I'm gonna have 47 mic and a 47 nanofarad again but I haven't actually done that but yeah but I didn't know how much voltage these are gonna take and the last time what I did this and I think I wasn't quite sure how much voltage a capacitor was gonna take and I hadn't thought about it they exploded so I thought I'd share that this time because the last time when I did it it was fun for me but I wasn't recording it and then I have to do it again just so you know other people could have fun with it because I thought it was quite good so this time before I chuck this down and the meter on now I was gonna put this meter on as I always use this meter but it's only use this one because there's a built-in meter on here and I got these for these silicon leads I pop that on there I'll pop that on the positive so this should say so 12 volts out because we got the the earth coming through which is coming from the the center tap also yeah it's coming through the center tap of this transformer to 24 volts you see so I joined up the center so I should have 24 aside I got the center tap and that goes in into ground so that's gonna come down and it goes between two capacitors you know where the two legs would touch here that ground is and where the two legs would touch is where that ground is as well and that comes into to the earth part of the the ground part of this regulator and here's the input from there from the live so and the one side goes into the bridge and the other side of course goes into the bridge as normal this is the negative out the back of the bridge the positive out the front of the bridge so the positive here is going on to the positive rail on here and the negative into the negative rail in here and just from the middle of all this and from that going to the ground here and the negative when it arrives Tuesday should be a Tuesday this week that will also connect to the native so I'm gonna put this down now and just sit back a little bit and see if anything goes by these are 50 volts each they should be fine because we're only having to deal with 24 volts aside basically so they should be fine but I'm not sure what these are gonna do so let's go to go okay and over there nicely 12.32 volts it doesn't seem to be way than about too much which is what I'd expect and all that over here it says 12.54 we're gonna let it off just because you know they're gonna be slight slight difference but nothing's gone back I'm quite surprised because I sweat up don't even see my hand look that's how nervous I am doing this especially when it comes to the mains because I'm scared of electricity I'm scared and I remember once being up in the attic and I touched the wire you know I felt the jolt of electric nothing that made me stick to it or anything but it was still enough to make me out leave some marks in my shorts so I'm quite chuffed so that's one side of one side of this 12 volt regulator which is gonna be quite good and then what I'm gonna do then is I'm gonna rebuild this and 18.75 if I get this to work and it does work okay what I'll end up doing is I'll get another LM 18.75 these are cheap ones from China and I've already broken one of them I don't think I've got any more I think I already got two I'll have to check yeah I'm pretty sure I already got two but I'll get some from RS you have to buy them in fives well I'll look at a fine hour as well and see what I can just get a couple of centile but you get free free delivery you know over a fiber and it will cost £10 plus plus the tax so like £12 for five of them but it'd be nice 18.75 because I've seen I've been watching John Audio Tech guy again and he likes these and I think if he thinks they sound pretty good I'm gonna go for that and this one does actually sound pretty good even though my connections are absolutely terrible I got a little function generator there and I connected that up maybe I could do that now maybe I could put a pause on this and do that now and show you how terrible these socket boards are I'm gonna do that so just get let me get a pause on this and a pause on this I'm always wanted to say as well if I don't know if you've noticed here this is a Linux system I'm using here now I decided to take out my Windows 10 Pro the hard drive from out my desktop which is below that screen stuff over there and I put it directly into my laptop I got that laptop to start configuring for the devices when it first started up so it would basically what it does is it realises all the drivers are on and makes a like a log of all the drivers that it needs to put in there so I let it do that for about five ten minutes and then I took it out and then put it back into my desktop where it had all the lists for the updates for the drivers got it to do all the updates so all the drivers didn't install them took it back out on my desktop put it into my laptop half hour later I've got a Windows 10 Pro with all of my settings and you know install programs and everything the way it was on my desktop now in my laptop lovely and then I thought I'm gonna stick out this new Ubuntu as I like Ubuntu I like Linux I like Fedora Fedora Core before Fedora and I thought I'd stick that in and see it all works in its brain absolutely great so I spent hours last night in the front room watching the funny things on TV but I'm not watching it like Johnny English and when I did that and sat and played with it I'm waffling we want to see how the different connections make this sound terrible so just give me a second and I'll come back and show you that