 Hello everybody and welcome back to my video log to my channel. I really do feel the need to go over these 0-30 volts and 2mA to 3A highland or non-highland power supply boards. Now the reason why I'm reiterating this is because there are still people out there building these and they are not giving out the correct information. And they have affiliate links and it annoys me that they will build them and show you in such a way that it doesn't actually show you whether these work or not. And I'm here to tell you now that they don't. There is one board that I've come across. There are four boards. I know of these four variations. And I saw one on the IMS AI guy channel. His one is 0-30 volts 3A power supply kit EQ kit EQ kit which is a different variation to these. The up amps these little ICs here go in a horizontal line across the board. I've never seen one of those before. Unfortunately it's inconclusive to whether that actually gets up to 30 volts because he didn't put a 24 volt AC supply on his and he only put a bulb on the output so we didn't get to see whether it's 30 volts or not. Inconclusive. This here I'll put a link. This here is a working one. You can tell that it works because I've made videos showing that these work up to 30 volts and 3 amps plus a little bit more. It will drop the voltage down to sort of 28, 27 volts. Being a bit more out of it, I wouldn't run that. Like that I'd go with a spec recommended 3 amp output. And you can identify these by these little boy type holes which is different to this and it is different to this. The EQ kit has like little metal. It just looks like it's a little metal thing. I'm not going to put a link to his video there but you can look that up. It says number 710. 0-30 volts 3 amp pulse light kit EQ kit if you want to look up his video. So there's the differences on these corners. Now the other differences that's stark is that the voltage regulator which regulates 24 volts here and yes you can use different voltage regulators if you like. You can even stick a ViBot regulator on there. Just don't try and pull loads of current through it unless you've got this attached to your heatsink as well. Even this doesn't have, forget about it. This works. This will get you up to your 30 volts but there's a little bit of an issue with the noise that comes off. The regulator when you check. There's a lot of noise there. So I would say that this is a slight fail as well but it does get you 30 volts. Now these don't and I have not come across one video. Now please don't just start telling me in the comments that you know someone that made this work and you've seen it. No no no no no. I've looked and I've searched specifically for people building these boards and what I find there's a lot of people out there doing some very well known channels as well. Do it but they either don't put the 24 volts in here and none of them show 30 volts coming out of here. 23, 24 volts. They put a lower voltage in here and you get a much lower voltage out of there. The calculations that they're doing, I saw one, was that you already get 23 volts out of here. He's already putting 24 volts in there but that's not how it works. AC rectified to DC is a AC input times 1.414 which will give you about 33 volts. So you've got a little bit of voltage being dropped across terminals here. You've got little bits you're losing and your output will be around about 30 volts here. As I've seen other people have left comments saying you can directly connect DC input to this supply capacitor and that doesn't work either because these ICs are differential input which means you need a positive voltage and you also need a negative side of the voltage as well. So let's say two 16s or two 15 to 15 positive 15 negative and that's what this little bit of circuit down here does. So not one of these have I seen giving the correct output. They all claim that this is a good buy and most of them have affiliate links which is the thing that really annoys me especially when I keep being asked on my videos about these. I thought you know it's best to say to you look this is the problem what you get is in your advertising picture on a lot of these where you buy them from and I'm sorry I can't unless I went through all the suppliers trying to buy a batch from all suppliers to find out who gives you the right ones. There's not a lot I can do but I can't I can't find out who is genuine and who isn't without spending a lot of money doing it and I'm sorry I can't afford to do that but what you get on the advertisements is you get a picture of this generally and you'll see it here and you might watch one of my videos who's stressing to you don't buy them unless they're like this and you'll be sent one of these. No one so far I've seen and I went looking I went hunting I was just trying to please let there be a video out there so I can tell people hey yeah you can go and look at this um I've heard people say it's these I see is a wrong I've heard all sorts of but if you've got a claim that one of these words correctly please put a link in it will be held for review because I don't just allow links in otherwise you'll have a big link party going on and that's not what the channel's all about but I will look for the next two weeks and I will look at my held comics now what I want to see is a timeline link to where they put the 24 volt AC in here and then another time on when you get the 30 volts out of here all right this isn't about the current the past transistor doesn't have a problem dealing with the current here it's whether this and I think it's you three is the one that determines what comes out of here and it's about whether you get the the full out of here all right 30 volts 24 volt input 30 volt output I'll be looking at those links for the next couple of weeks please if you've got any evidence that this works just and it's after two weeks just say yeah I've left the link for you it's not going to show up I've left the link for you now go and look at the held links but I'm telling you now guys you you want to go out and buy one of these you think it works unless you see a video that's showing you you can get 30 volts out of it you know if you're happy with 23 volts out you put your 24 volts AC in here really getting 23 volts out fair play all right that's up to you and I've got no I've got no issue with that what I do have issue with is but when people are trying to tell you that you will get your 0 to 30 volts and and you're quite clearly can't right now I'm again on with a much better video one that I really prefer to do rather than this thanks for watching if you got this far and don't get suckered don't get fooled by by these and if you are going to buy one make sure take a photo or something of one of these and with these and send the seller images and say is this one I'm going to get because if I'm not going to get this I don't want it you might hear from the seller again but you're much better off getting a board that's going to work than one that isn't bye for now take care everybody