Electronics and technology blog    /    All publication of the user kirich    /    Page 9

Today's review will be relatively short, although I wouldn't say these batteries are uninteresting—quite the opposite, really. They just didn't involve any intrigue or mysteries.

As I wrote in my previous review, almost all the batteries I received have some feature that caught my interest. Here’s the second one I’m testing, and what caught my interest wasn’t so much its specs as the fact that there’s no information about it anywhere.

Recently, I unexpectedly received a new batch of batteries from my sponsors at Vapcell. At first, I expected a routine series of reviews, but things turned out to be much more interesting: all (or almost all) of the batteries have some unusual feature, and a few even left me stumped. But you can find out all about them in the review.

About a month and a half ago, I posted a preview of RuiDeng’s new adjustable converter, the RK6006. I finally got my hands on one recently, tested it, and today I’ll share my thoughts.

It's been quite a while since I last tested batteries. I needed some cells in the relatively uncommon 18350 size to repair a vape, so I bought some, tested them, and here are the results.

Like many others, I use leads with alligator clips to connect a bench power supply or electronic load, and I felt like replacing them. Of course, I could make my own leads, and I do use some, but I was feeling a bit lazy. I searched AliExpress, found what looked like a decent option, ordered it, and decided to share my impressions.

As I’ve already mentioned, I needed some high-performance fans for one of my projects. First I bought a couple of AVC fans, then, almost as an afterthought, three more from Sunon. Tests showed that the AVC fans I bought didn’t live up to their specs, but it was hard for me to judge what they should be like since I had nothing to compare them with. Today, though, I’ll show you the Sunon fans and compare them with the originals.

Today’s article isn’t just for the sake of it—it’s about a specific topic, as they say. I’ll be discussing one mistake that, for some reason, crops up all too often. And it’s not just beginners who make it; even quite experienced engineers do. Let me say right away: I didn’t write this post to hate on anyone, but rather for the sake of safety. And believe me, I have my reasons.

As it happens, radio amateurs most often use three basic instruments: a voltmeter, an ammeter, and an ohmmeter. But sometimes a job calls for a more complex and less common instrument: an LCR meter. Of course, these instruments come in both professional and "hobbyist" versions, but first, let's look at what an LCR meter actually is.

Today's review will be very short, partly because there isn't really much to review here, and partly because the project this board was intended for is still in development. Still, I hope you'll find it useful.

Continuing the discussion about electronic loads. As everyone knows, a load is something that usually gets very hot. And when something gets hot, it sometimes needs cooling. The most common solution is a heatsink, and when that isn't enough, you add a fan as well. Fans aren't exactly cheap in local stores these days, especially high-performance ones, so I ordered some from China.

I’ve covered buying used components from AliExpress/Taobao on my blog several times, but I decided to play roulette once again, and it looks like I got lucky this time.

I’ve already reviewed two electronic loads made by Atorch. I can’t say they were all that great, but I can’t say they were bad either. That said, I’ve noticed that each new version of their products gets better. While I wait for mine to arrive for review, I thought I’d put together a short preview.

A friend recently asked me to help a relative of his repair a power station. Since I wanted not only to help but also to see what was inside and how it worked, I naturally said, “Send it over.” The station has now been repaired and inspected, and I have something to tell you about it. Since this is essentially two articles in one, though, it’s going to be fairly long.

Today I have a short review on a very popular topic: fuses. Yes, we’re talking about the component that, as everyone knows, is the last thing to blow. Of course, there are plenty of nuances here, and I’ll try to explain some of them.

Many of you probably remember that I’ve had just about every converter model from Riden, or RuiDeng, pass through my hands. To this day, I’m still not sure which name is correct. After the RD6012P came out, I’d check from time to time to see what was new, but unfortunately, nothing had changed; the hybrid 6012 was still their latest model. Then, just today, I spotted a new product, and I’d like to share the announcement with you.

Some time ago, one of my subscribers sent me a power supply—or, more precisely, a charger—not for repair, but for testing and review. But what’s actually more interesting is a certain “special feature” I’ve wanted to tell you about for a long time, but hadn’t come across a sample to show. To get ahead of myself, everything turned out better than I expected :)

Another power supply has come my way, this time from an SVEN SB-550 active speaker system. The repair is fairly routine, but still interesting in its own way, and involves replacing the PWM controller with a non-original part.