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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.

My work often puts me in situations where a device connected to a computer via USB must not have a direct electrical connection to it. Otherwise, this can cause anything from severe interference to complete loss of functionality, as well as interaction between the computer’s power supply and the device under test. There aren’t many ways to solve this, and the simplest is to use galvanic isolation.

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.

Not long ago, I came across an interesting kit on Taobao—or, more accurately, not a kit but a converter control board, since it’s also sold separately. Curiosity got the better of me, so I decided to order one and give it a try. There was also a useful story involving the seller. Anyway, it’s best to read about it in the review.

I recently received another little package from Taobao, and I’m slowly starting to publish reviews of the items it contained. I’ll start with some small converter boards, especially since people have been asking me about them. This review covers boards with an input voltage of 36–75 V and a power rating of up to 50 W.

Today’s review is about some uncommon, specialized devices that can nevertheless be very useful: powerful, compact voltage converters. What makes them unusual is their 36–75 V input voltage range, which is rarely used by DIYers. But I’ve been asked about converters like these several times, so I decided to fill that gap, since I haven’t come across any reviews of them.

This is already the third review of RuiDeng products that I’ve posted, but there are actually quite a few reviews of their products out there, so today I’ll try to add a little to the previous ones—especially since this converter is interesting in its own right. As always, I’ll take a look at it, run some tests, cover a little theory, and share my conclusions.

Today on my workbench I have an adjustable voltage converter with an output voltage of up to 50 V and a current of up to 20 A. As far as I know, this is the most powerful converter in RuiDeng's product lineup. What's more, its specifications are very similar to those of the ZXY-6020, which I reviewed earlier and will be comparing it with today. While I'm at it, I'd like to say a big thank-you to one of my regular readers, without whom this review probably wouldn't have happened.

I've built lots of different kits: amplifiers, an oscilloscope, a signal generator, all sorts of measuring instruments and power supplies. Now it's time to try something new for me: building a DAC. In this case, we're talking about an audio DAC (digital-to-analog converter). As usual, in this review I'll show you the kit itself, the assembly process and some tests. But I'll also try to fit the whole thing into a case afterward :)

I've been asked about reviews of converters like these many times, both in the comments and in private messages. I've seen plenty of reviews of similar devices, but somehow never got around to trying one myself. Partly because I already have quite a few different adjustable power supplies, and partly because I have a general idea of what these converters are and how they work. But as it happened, I needed exactly this kind of converter for a project, so I decided to order one for a review. This won't be a very long review. It'll mostly be about my personal opinion of the converter itself, its design and controls, and my overall impressions compared with models from ZXY.

It’s been a while since I last wrote about voltage converters. Today I’m reviewing not just a converter, but one with the added ability to work with QC 2.0 and 3.0 protocols. This won’t be a very long review, but I hope it’ll be useful.