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I’ve finally reached the third and final part of my look at the power supplies available from specialist stores. This part will be relatively short, but I hope it’ll be interesting. As always, the best bit comes at the end :)

Last time I covered three power supply models. Today there are as many as seven units under test, all bought from a different, but also fairly well-known store—"widely known in certain circles," so to speak.

Today I’m starting a short series of reviews looking at what other power supplies are available in Ukraine. I’m not talking about random units listed on OLX or Prom, but products from fairly large sellers. Yes, sellers is the right word—I’d like to say manufacturers, of course, but I don’t know that many manufacturers, and they mostly focus on industrial models, though not always.

I’ve already reviewed some models from this series. Back then, we were given “prototypes”—just the circuit boards. This time, the power supplies differ from production units only in that they aren’t potted; they also incorporate the changes we recommended.

We’ve reached the last compact adjustable converter in the RK series. I have to say, Riden has pleasantly surprised me with this lineup: it covers a wide range of power and current ratings, includes an H-series model—a less powerful counterpart to the RD6012H—and also a model with an extended output range, which is what I’ll be looking at today.

I've taken a look at another converter from Riden: the RK6018, which is advertised as delivering a full kilowatt of power. And yes, I think that's a record for something this size so far. Let's take a closer look and put it to the test.

Riden is really on a roll. I’d just finished reviewing their new RK6012 when they released three new models at once. I already have two of them at home, and the third is on its way. Honestly, I never expected them to bring so many new converters to market so quickly. Though, to be fair, I wouldn’t mind seeing an RD6036, first of all, and an electronic load from them as well.

I’ve already posted an unboxing video of the RD6030-max power supply, and said then that I’d write a short article about it too. But one thing led to another, and the article kept getting put off. I’ve finally found the time to pull everything together and tell you about it.

A while ago, AliExpress started showing me listings for the same power supply from different sellers. I had a project that called for exactly this kind of power supply, so I first bought a few to try out, then some more, and then more again. Before long, I was using these power supplies in production devices.

One of my readers saw my comment about the low-voltage UPS board and suggested I review it, so he sent me this board. Given the current circumstances, these devices have become relevant again, so of course I agreed—especially since I was very interested in it myself.

I've mentioned several times that we're not just trying to find decent power supplies among all the Chinese junk—we also send the factory recommendations for improvements when a power supply has no critical issues and is reasonably priced. So today, most of the models here are ones we received after they were modified to meet our requests.

This turned into a quick-fire roundup: seven power supplies at the same voltage, 5 V, but with different power ratings. These power supplies are often used to power addressable LED strips, LED displays, and similar things, but there’s nothing stopping you from using them for other purposes too.

While I was thinking about this article, I kept remembering an old and quite famous film with the unassuming title "Three Plus Two". Why? Because there are five power supplies: three of one type and two of another. They also fall into two pairs—100 W and 200 W—with one 400 W unit on its own. So today I'm reviewing two 100 W power supplies, two 200 W ones, and one 400 W unit. I think it'll be interesting :)

Another installment in the series about taking on Chinese power supply manufacturers. Today I’ll be looking at six stick-style models: a teardown, tests, and conclusions.

We recently received several test samples from one of the factories. They were originally designed to be sealed, but we asked them to send the units without potting compound so we could test them “bare” and take a look inside.

Last fall, I had a small order lined up to build a clever UPS, but the order was eventually canceled. The power supply I’d bought for it, though, was still here. I finally found a little time to test it, and I think this will be useful for anyone planning to buy one like it.

Another batch of power supplies to test, this time in sealed enclosures. These power supplies are commonly used in lighting, especially outdoor lighting. This review will consist of nine relatively brief descriptions of each model, along with test results, conclusions, observations, and a small bonus.

Not long ago, I noticed that the range of converters from the well-known company Ruideng had expanded with a rather unusual model. Naturally, I contacted the manager and ordered one for review. To get ahead of myself, I’ll say that I haven’t regretted deciding to test this model for a moment.