Electronics and technology blog    /    All publication of the user kirich    /    Page 24

A few deals that might be useful.

Batteries in the relatively uncommon 18350 form factor, but with a decent discharge current.

A relatively short series of reviews of VapCell batteries, featuring some interesting models in my opinion.

Just recently, I posted a review of a power supply with a UPS function, and criticized it. Some of that criticism was justified, and some wasn’t. Today I want to talk about that, and also explain how to modify this power supply to get what I consider a better balance between the charging current and the main output current.

About a year ago, in one of my reviews of ZKEtech electronic loads, I wrote that I wanted to pick up a couple more. Recently, I bought and received one of them—the model with the highest current rating in the company's lineup. A look around, a few tests, and of course, my conclusions.

Today I'm reviewing a rather unusual power supply. What sets it apart from the ones I've reviewed before is its uninterruptible power supply function.

You’ve probably heard of GaN technology by now, even if you’re not particularly interested in the world of modern power supply design. But this is the first time I’ve had a power supply like this, and today I’ll try comparing it with an almost identical model from the same company. Inspection, tests, comparison, measurements—as usual.

They sent over a coupon for three Choetech products, and I thought it might be useful.

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.

I recently published two reviews of 32700-size LiFePO4 batteries. At the time, I wrote that I’d like to use them as replacements for conventional lead-acid batteries. Then, quite by chance, I got my hands on a brand-new CSB HRL-1234W battery, the kind used in UPS units, and I wanted to see “what’s what.”

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.

Not long ago, I reviewed VariCore 32700 LiFePO4 batteries. At the end, I mentioned that I’d ordered the same batteries from the same store, but under the Liitokala brand. The batteries have now arrived and been tested, and, most importantly, I was able to compare them with the previous ones. It turns out there’s a significant difference. But as usual, you’ll have to read the review to find out all about it.

I left this power supply for what you might call “dessert,” partly because it stands out from the rest of the units shown earlier, and partly because I simply liked it more than the others. In any case, that’s not particularly important, and today I’ll tell you about a power supply that needs no modifications.

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 :)

Continuing my series of power supply reviews, today I’m looking at some used boards. They have relatively convenient output specifications, which is why I ordered them for review. As always, the review includes a detailed inspection, schematic, tests, analysis, and conclusions.

When I first started writing this review, I had no idea where it would lead. In the end, I inadvertently ended up with a “two-in-one” review, even though it’s essentially about the same power supply. As always, the review will cover the inspection, schematic, tests, more tests, and conclusions.

I got the chance to test some more power supplies, and today I’m reviewing the first one. As always, the review will include an inspection, analysis, circuit diagram, tests, and conclusions.

I think many people know the compact TS100 soldering iron, which came out a few years ago. Small and powerful, but... very expensive. And not long ago, a very similar-looking but much cheaper SH72 went on sale. Of course, it’s more basic, with no display, buttons, or option to play Tetris, but it’s still perfectly functional.