 Hey guys, I just wanted to show you this little circuit that with one move basically you can change the circuit from a dual power supply circuit to a voltage doubler as long as the little transformer that you're using has a sensor tap. For it to be a voltage doubler you don't need the sensor tap. All you need is your little bridge rate to fire, your AC will go on to the bridge rate to fire as it normally does, any of the side. Your negative will come out the negative, the positive will come out the positive as they normally do and then on the positive side we'll put a capacitor. So the positive leg of the capacitor goes to the positive side and we will then meet with another capacitor and bridge with the negative side of this capacitor, the positive side of this capacitor going to the negative side of this capacitor and the negative side will come here to the negative lead coming out of your bridge rectifier. What this will give us is basically two capacitors in series and so what we will get is this is 14 volts once it's DC regulated, it's going at 19.5, 20 volts and if you can see that there 19.5. Now if we want that voltage to double what will you got to do? You have another wire where your AC went in, this is exactly the same place and the same line of sockets as where your AC went in and we'll just put the out part of that in between these two capacitors. Now basically what happens now is that voltage gets doubled. It is no longer the 19.5 volts, it's now 39, only 40 volts. It's about as crude and simple as you get and now something else that you can do with this, if your transformer there has a little center tap coming off it like this does here, what you can do is you can take this wire out that you've just used to make it a voltage doubler, take that out and in between these two capacitors where you had that wire, put your center tap and then once you get then, let's just pop this in, it's going to be a little bit difficult for me too without the tweezers because the end on this isn't, it's a bit frayed. Okay so I put that in there, sorry we didn't see that, there it is between those two capacitors, that's the center tap and now what we've got, what we got, what we got now is we have a zero voltage, we have a positive voltage and we have a negative voltage, so the zero, positive and a negative. Effectively we've got a dual power supply using the center tap of that, or that second drip and I'll show you, so if I put, yeah if I put this in here and just connect it to one of these legs of the capacitor, it doesn't matter which one because it's just making that bridge circuit and it's going to be connected to the center tap basically, now I put the power down so we can see what's on there and we got positive 18.3, it's going down because really, I don't actually know why it's going down, but that's where it's supposed to be anyway, so and if I take that off and I take this positive lead here, let's connect that and I come round to this side and I connect that there, what we then get is the negative side, so from here we've got the positive and here we've got the negative. A dual power supply. It's cool. Cheers watching guys!