Electronics and technology blog    /    Materials for February 2022 year

A few words about power supply in difficult conditions, briefly, and as a preview.

In my previous review, I covered a powerful relay with WiFi remote control and a few other "bells and whistles". I also mentioned that I’d review another relay, and I’ve now finished testing it and can share the results and my conclusions.

This device is more commonly called a trigger, though that’s not quite accurate. Somehow, the name just stuck. I decided to order one mostly on principle—“just to have it.” And since I’ve got it in my hands now, why not test it and show what it can do?

Today's roundup is about materials and tools for assembling battery packs, though I may add a few other things as well.

I love all kinds of interesting electrical gadgets, so I ordered a couple of different ones to try out, compare with others, and tell you about. Today I'm reviewing the first one: a WiFi-controlled relay.

I got my hands on a dual-port converter with QC support for a little while, so I decided to test it a bit in case anyone finds it useful.

The new RD6024 converter from RuiDeng has finally made its way to me. Yes, I’d been waiting for it ever since the announcement and the release of the first model in this series, the RD6006.

I got my hands on another batch of batteries, and this time they’re 21700 cells rated at 4800 mAh.

I wouldn't exactly call myself a builder, but I still believe you can never have too many tools, so I ordered something I didn't have yet: a circular saw. And since I prefer cordless tools, I went with a cordless saw. As usual, I'll take a look around, do a little disassembly, run a few tests, and share my conclusions.

Not long ago, I published a review of an NTP-synchronized clock and mentioned that I’d ordered another one, a cheaper model that also supports synchronization. Well, it’s arrived, spent the requisite time sitting around while I waited to review it, and now I can show it to you :)

This is the fourth battery from LiitoKala, but this time it’s not a 26650, and it’s not 3.7 V either. As always, find out more in the review.

This is the third battery from LiitoKala, and in my opinion it’s a little... strange. But more on that, along with the inspection, tests, and conclusions, as always, in the review.