Electronics and technology blog    /    Page 17

You’re not imagining things: I reviewed these batteries almost two years ago. But back then they were from Nkon; today’s ones are from AliExpress. A look at the batteries, some tests, and of course a comparison with the previous ones.

Batteries in this size aren't particularly rare, but these caught my attention because they're rated for a continuous discharge current of 15 A. As usual: a look at the cells, tests, graphs, and conclusions.

Another device from Novatek, and this time we're looking at an interface converter—in this case, from RS-485 to WiFi, with data transmission over the MODBUS-TCP protocol. As always, we'll take a look, take it apart, test it, and draw some conclusions.

I got my hands on another batch of batteries from Vapcell, and today I’ll be taking a look at batteries in the relatively uncommon 14650 form factor. As usual, the review covers the inspection, measurements, tests in different operating modes, and conclusions.

I think the vast majority of people reading this have used a computer mouse. Like any device, mice sometimes break, but sometimes you can give them a second life.

It just so happens that I usually get relatively small batteries to test, but people often ask for reviews of higher-capacity cells, for example for UPS units. Today I’m testing 90 Ah LiFePO4 cells: I’ll inspect them, test them, and discharge them in a freezer.

I decided to start a topic where I’ll collect translations of descriptions and manuals for various devices. I think it will be useful.

Some time ago, I reviewed a basic soldering station controller and shared a few ideas for how to use it. But after playing around with it for a while, I realized it wasn’t quite right for what I had in mind. Then I got my hands on a controller board that turned out to be just what I needed for my project.

I ordered these batteries for a friend and borrowed a few for testing, so I decided to put together a short review in case it might be useful. These batteries come up in the comments quite often, after all.

About five years ago, I published a review of a thermal imager, and now it’s time to update it. I looked at various models, but in the end decided on the HT-A2 from Hti. I ordered one, received it, used it for a while, and decided to put together a short review.

Last year, I posted a preview of these rather interesting clocks and mentioned that I planned to buy them. They took quite a while to arrive, and then I didn't have a chance to write a review. But I finally got around to it and decided to show you what these clocks are all about.

The story behind this order is very simple: I spotted an interesting, inexpensive drill/driver and thought it might be worth a look. But, as sometimes happens, "something went wrong". Still, in reality, things turned out not so badly, but even so...

Another module from Novatek. This time, I'll take a look at a device for reading measurements from various types of sensors and using them in automation systems, with the option to send the data to a PC as well. Inspection, teardown, tests, conclusions.

One of my readers sent me this battery, and I’m very grateful to him for it. It’s not brand-new and has a few quirks, but as always, you can find out more in the review.

This is my third review of an active balancer and my second review of a capacitor-based one, also known as a capacitive balancer. Last time, I focused more on how it performs, but said almost nothing about how it works. Today, I’ll make up for that omission.

Today I have an ATS on my desk—short for Automatic Transfer Switch. In simple terms, it’s a device that automates the switch from the main line to a backup line if a problem occurs with the main supply. And since this is a microcontroller-based device, it naturally offers more features and capabilities, which is what I’ll cover in this review.

There’s a discount on these TWS earbuds. I don’t use earbuds like these myself, since I mostly work from home, but judging by the reviews, there are no complaints about the quality. I thought they might come in handy for someone.

It all started when the battery in my old Q&Q “cuckoo” watch began to run down. When I went to check what kind of battery it used, I noticed cracks had appeared in the case. In the end, a crack in the case of my old watch led me to buy a new one, which is what I’m going to tell you about today.