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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.

Continuing the previous comprehensive review, this time with a pair of 21700 batteries: one is geared more toward high current, the other toward high capacity.

Not long ago, one of my readers got in touch again and asked me to test some batteries. Why not? I find it interesting, and it’s useful for you, so I agreed. Today is part one: 18650 cells from the same manufacturer, the well-known EVE.

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.

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.

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.

Strictly speaking, it would be more accurate to say not 10 power supplies, but 6+4: six were sent for preliminary testing as samples, while the other four arrived after some revisions and are essentially production units. But the point remains the same: today’s review covers ten 12 V power supplies with different power ratings.

You come across all sorts of things on the power supply market, but I hadn’t seen power supplies in this form factor before. I’m not saying it’s a good design; it’s just out there, so I had to take one apart and test it.

I received another batch of various power supplies for testing, and among them were some unusual ones in round cases, so I decided to start with those :)

Not long ago, I reviewed an entire series of LS power supplies. They differed slightly in their circuitry and specifications, and some of them were high-power models. It turned out that I’d forgotten to test one model, which was a shame, because it proved to be very good indeed. So here I am filling that gap.

I actually reviewed an entire series of these power supplies, but this particular one got held up in transit somehow, so I’m only publishing its test results now. And believe me, this SMPS is worth showing you.

This is a continuation of the previous review, but this time there are twice as many power supplies, and their voltage is also twice as high. The basic idea is much the same, though: these are very interesting models, and they’re available in Ukraine.

Another batch of power supplies has arrived—lots of them, all kinds—and today I’ll tell you about a couple of interesting models worth a closer look.

The new Riden product has finally arrived: the RD6018P, a new version of its adjustable hybrid converter. The previous model came out just over a year ago, and that was the RD6030. To be fair, for some reason I thought the next one would be the RD6036, but the manufacturer managed to surprise us by making the next hybrid model an 18 A unit.

I was sent this little oscilloscope, and in my opinion it turned out not to be nearly as bad as I initially thought. But of course, you can get a better idea by reading the review.

Not long ago, I wrote that I’d ordered Atorch’s new BW600 electronic load. I’ve now received and tested it, and have also figured out some of the new version’s quirks. I found both advantages and drawbacks, and built a couple of new devices based on this controller.

While I’m waiting for my new electronic load, I decided to put together a quick review of another power supply. There’s nothing particularly new about it, but it may still be interesting in some ways—at least because I haven’t had one like this before.

I have two bits of news today. The first is good: the price of my favorite version of the load has been reduced for the sale. The second—well, I hope it’s good too :)