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Not long ago, I published a review of a board for building a simple spot welder powered by supercapacitors. Today, I’m continuing that series: I’ll tell you about a much more capable device and, along the way, build a welder based on it.

As it happened, I got my hands on a simple clamp meter, which is what I’ll be reviewing today. I’ll try to keep this brief while still covering the inspection and tests.

A friend recently asked me to test a small battery for quadcopters and similar toys. I was curious, so that’s how I came up with the topic for today’s review.

I ordered some things from Taobao not long ago and needed something to fill out the package. I spotted these tweezers and ordered one to try, just out of curiosity. This is probably one of the shortest reviews ever :)

Today I'm reviewing a product that isn't exactly unusual, but is definitely quite rare. In general, based on my personal observations, the number of reviews of devices for industrial and specialized applications is close to zero, and with this review I want to help fill that gap a little. So today I have a rather interesting gadget on my desk with a complicated name: an Electrical Parameter Recorder.

I've reviewed quite a large number of different power supplies by now, but today's review is a little different. No, the power supplies themselves are much the same; the difference is the manufacturer. If I'm not mistaken, this is my first review of power supplies made in Ukraine.

It’s been a while since I posted a power tool review, and now I’ve got my hands on a cordless angle grinder designed for standard Makita batteries—and it also has a brushless motor. Today I’ll take a look inside, take it apart, run a few tests, and include a small bonus.

I think many of my readers remember that I often test batteries, and for quite a while I've also had my eye on a dedicated battery tester. Yes, friends, today we're talking about the EBC-X electronic load and tester, which I finally bought :)

Like many people, I have a WiFi router at home for tablets, laptops, and lately various IoT (Internet of Things) devices. But because of the apartment's layout and the less-than-ideal placement of the router, the connection is poor in some areas, so I decided to improve things a little by installing a WiFi repeater.

Last fall, a very interesting adjustable voltage converter, the RD6006, went on sale. It stood out from previous models with its large display, convenient controls, battery charging function, and WiFi connectivity. But discussions soon started: 60 V is certainly nice, but 6 A is a bit on the low side. The manufacturer replied, “Don’t worry, a more powerful version will be out in about six months.” In fact, it took longer, mostly because of the virus, but the manufacturer didn’t abandon development, and today I’m reviewing the version with an output current of up to 12 A.

Lately, I’ve been seeing quite a few reviews where people either build spot welders or use them in their projects to assemble battery packs. I’ve got one of these devices myself now, though it’s quite different from the ones I’ve seen before.

Today, a very brief review of a fairly ordinary voltmeter, but one that can be mounted on a DIN rail—that's actually one of its main distinguishing features. As always, the review includes an inspection, tests, a teardown, and an explanation of why I needed it.

Some time ago, a new version of the converter called the RD6012 went on sale. Since it also needs a power supply, I ordered a suitable one from the same store—in this case, an 800 W unit with an output voltage of 70 V. This review won't be very long. You'll see why as we go, but there will still be some tests.

Some time ago, one of my readers asked me for advice and, while we were at it, offered to send me some INR18650-25R batteries for testing. He had bought them on AliExpress several years earlier. The test was done simply “out of curiosity” and wasn’t intended to serve any practical purpose, but I did find a few interesting things.

This device is hard to classify as a “residential” product, although of course it can certainly be used that way. Its main applications are small businesses, office buildings, rental properties, and so on. Even so, I found the device interesting in its own right, and I’m planning to use it at home. But you can read all about it in the review.

Yes, friends, the cycle-life test is back, and this time we have a genuine Sanyo NCR18650GA battery. But this isn't just a test: we're testing it under conditions the manufacturer doesn't recommend—in other words, we're deliberately killing the battery and seeing how it holds up.

After reviewing two phase-selection relays, I managed to arrange for a couple of interesting devices to be provided for review. One is aimed at the "household" market, while the other is more geared toward small businesses. Today I'm reviewing the first one, the RN-263T voltage relay.

Back in March, I was asked to write a review of the 1C15 mini oscilloscope. I can't say I was particularly eager, but I was curious to tinker with it. There were two reasons: it's a popular model, and I've also been asked several times about a simple oscilloscope for basic work on power supplies. Well, I finally got one and did a few tests.