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No, friends, this isn't actually a coupon or a sale. I was just browsing AliExpress and happened to stumble across a model of adjustable converter I hadn't seen before.

While putting together one of my Taobao orders, I came across some interesting converter boards. After reading the customer reviews, I decided to pick up a few for myself. Since someone else might come across them too, I thought I’d put together a short review.

I’ve finally gotten around to the XYS3580 converter, which has been written about more than once. So why not take a look? It has a universal input and delivers up to 80 W. As it turns out, though, it has plenty of “quirks” that I want to tell you about today. A look inside, tests, oscilloscope traces, and a modest attempt at putting it to use.

Today I'm reviewing a somewhat unusual device. Due to a few circumstances, this review will be short and won't include everything you're used to seeing here. That's just how things worked out—and maybe that's for the best.

I've already reviewed various converters, both large and powerful and really tiny ones. Today I'm going to take a closer look at a very compact version of a fairly powerful converter, with an output current of up to 4 A. Tests, oscilloscope traces, graphs—as usual :)

One of the readers asked me to review this converter, but somehow all my previous orders turned out to be duds. Finally, I bought this little board and tested it :) As always, the review includes a look at the board, tests, and conclusions.

The new product from Rui Deng has finally made its way to me: an adjustable voltage converter for building a bench power supply. I originally planned a more extensive review, but one of the suppliers let me down badly and shipped the power supply much later than I’d hoped, so I had to split the review into two parts: a main part and a follow-up. The follow-up will also answer questions that came up after reading the main part.

As I mentioned, I’ll be reviewing a breakout board for installing converter modules soon. I ordered it from the same Taobao store as the converters themselves, and I found it interesting enough to give it a review of its own.

Some time ago, I posted reviews of various charger boards and mentioned that one interesting board had been updated, with higher output power: 100 W instead of 60 W. Now I’ve got my hands on the updated version and put it to the test. Unfortunately, things didn’t go quite as hoped, but you can read all about it in the review.

Not long ago, I ordered an interesting little gadget from AliExpress. I didn’t have any specific use in mind; I just bought it because it was inexpensive and had some unusual features. But as usual, you’re better off reading all about it in the review. I hope you find it interesting.

I got my hands on two more converters from the well-known Chinese company YZXstudio. One is simpler and cheaper, while the other is correspondingly more expensive and comes in a “top-of-the-line” configuration. The second one isn’t just a DC-DC converter, but a universal bidirectional converter. But I think it’s best to read all about them in the review.

I got hold of a few compact step-down converters, bought just to “try them out”—they’re very cheap, after all. Today I’m reviewing a pair of almost identical, yet different, boards.

I've already reviewed voltage converter boards with QC support, but you always want more: more power and support for more standards. So I ordered several different models to try out. Rather than write three separate reviews, I decided to cover them all in one.

A review of another converter, this time designed for a single port, but with QC support. I’ve already reviewed a similar board, but this one is cheaper and smaller.

I decided to order a few different inexpensive converter boards to try out, and today I’m reviewing the first one. There’s nothing unusual about it: just a standard converter, without even QC, but with an output power of up to 40 W.

A few more useful little things from Tao, and voltage converters again—but not ordinary ones: these have bipolar outputs.

Another isolated converter, this time stepping down 36–75 V to 12 V. It’s relatively low-power at just 15 W, but I still think it’s useful. A look inside, a little information from the datasheet, tests, and conclusions.

Somehow, despite using a relatively large number of mobile devices, I get by without any extra “power banks.” Though it would be more accurate to say I get by without the kind most people are used to, since I do have a 12 V version. In this case, I was simply offered this Powerbank to review, and I thought—why not? At the very least, I can see how it’s made. As always, next up: inspection, teardown, testing, and modifications.