Electronics and technology blog    /    Page 14

Another roundup of assorted products—some I just came across, others I ordered, sometimes more than once.

This is my second pair of batteries from Vapcell, and unfortunately, it looks like it will be the last for now. These batteries don't stand out for their capacity, but they do deliver an impressive 35A. Inspection, tests, graphs, comparisons, and conclusions—as usual.

A while ago, I came across a review of a clock that synchronizes via NTP. Since I’m generally fond of clocks, I couldn’t resist and ordered one for myself. I actually ordered it from a different store, where it was a little cheaper, but that doesn’t really matter here, since they’re identical.

It's been quite a while since I last reviewed any batteries, so Vapcell sent me a few new test subjects. Today, we're looking at the first pair. I can't really say anything bad or good about them. They're perfectly decent batteries, but nothing particularly special.

I've already written a couple of posts about spot welder controllers that work with supercapacitors, but today I'm going to talk about a more "classic" setup with a powerful 50 Hz transformer. I'll show you the controller itself and a small example of how it's used in a real spot welder.

As 2021 draws to a close, and following tradition, I decided to publish my annual roundup of battery reviews. This time there are fewer than I expected, but I hope it will still be useful.

I’ve already posted an announcement for this converter model, which is an evolution of the previous 6006P model, differing mainly in its lower output current and power. Several readers have already asked me about this model. Well, it arrived, I took a look, tested it, and formed an opinion.

Another roundup of assorted products. Some were bought recently, while others caught my eye while browsing AliExpress. They might come in handy.

I recently reviewed the Mean Well EPP-500-54 power supply and mentioned that I had ordered two power supplies. Today I'm reviewing the second one, which was also originally intended for the RD6006 converter.

I’d wanted to buy this power supply for a long time, but one thing or another kept getting in the way. And now, at last, it’s in my hands. I’ll say right away that I like it, although it does have a few minor quirks.

Another power supply from OVEN: 24 V again, with an extended temperature range again, but unlike the previous one, it has lower power and is much smaller. So, let's continue our discussion of panel-mounted equipment from domestic manufacturers.

I’d wanted to buy a signal generator for a long time, but kept putting it off. Maybe because I already had a couple of basic models at home, or maybe because I didn’t really need one that badly. But after watching one of the videos, I finally decided to get one. I found the lowest-priced option available at the time, placed the order, received it, and did a few tests. I also upgraded the firmware to the higher-end model’s version.

It’s been just under a year since RuiDeng announced the previous version of its hybrid power supply, and now the developers have finally released a new model I’ve been waiting for: the same kind of hybrid converter, but with an output current of up to 12 A. Today’s “not a review” will include a brief announcement, a description, the differences, real photos of the device, and, I hope, a discussion of the new model in the comments.

I’ve already reviewed plenty of power supplies and devices made both in China and here at home. But today I’ll be testing a power supply from Owen, a well-known company that develops and manufactures industrial automation equipment. Let’s take a look, open it up, test it, heat it up, and draw some conclusions.

By a twist of fate, another power supply landed in my hands for a while—or, more precisely, one of the variants of a model I’ve reviewed before. As it happened, though, I had to make a few modifications before testing it. As always, the details are in the review.

I’ve already reviewed a similar router, but that one was corded. Lately, though, I’ve found cordless tools more and more convenient, so I decided to give this version a try. For the most part, the two tools are very similar, so as I go along I’ll describe the cordless version and share my impressions of using its corded sibling, based on hands-on experience.

DIY battery pack assembly has become increasingly popular lately, and many beginners run into the question of how best to arrange the cells in a pack to get the maximum capacity. Today, I’ll introduce a handy calculator for working this out.

A roundup of popular AliExpress products. I haven't bought these myself, but picked out products that other people buy very often, so there's a chance they're not all as bad as they sometimes turn out to be :)