Electronics and technology blog    /    Stores    /    Other Stores    /    Page 6

Not long ago, I promised a review explaining how to add digital control to a linear power supply board. Keeping that promise, today I’m posting a review of the board itself, along with some drawings, the schematic, firmware, and, for the real enthusiasts, the source code.

So, today I have the third of six power supplies sent to me by one of my readers. This time, it’s a relatively compact and inexpensive power supply. I’d even say it belongs to the budget range, since in some ways it’s noticeably simpler than the previous ones. But simpler doesn’t always mean worse, and I’ll try to show and explain all of that in this review. Anyway, if you’re interested in branded power supplies, I think you’ll find something new here.

Recently, I published a review of a kit for building an adjustable linear power supply with an output voltage of up to 60 V and current of up to 20 A (at least in theory). Today I’m reviewing a product from the same seller and the same series, but this time it’s not a kit—just a standalone module that can also be used with the control board from the previous kit. But I’ll cover everything in more detail in the review. I’ll also include the schematic for the relay module from the previous review.

Today's review covers a topic that's quite familiar to radio amateurs. There are plenty of reviews of adjustable power supplies, as well as kits for building them. I've posted a couple of similar reviews myself. But today's kit is a little unusual, both in terms of power and circuit design. Of course, radio amateurs have used all these approaches many times before, but this is the first time I've come across them all together in a kit, so that's what I'm going to talk about.

I've already posted at least three reviews of electronic loads: fully DIY designs, kits assembled from parts, and factory-made units. In this case, both options are more like kits, since they aren't complete, self-contained products. They can work on their own, but at the very least they need a power supply. I spotted them almost a year ago and was interested, so I finally decided to buy them—and see what it's like to shop on Taobao. Anyway, if you're interested in this topic, I think you'll find plenty of interesting things here.

We all live in the digital age now. It seems like everything is digital: TVs, computers, even household appliances are digitally controlled. But there are still situations where you need to work with analog signals, and that’s what today’s review is about.

About a year ago, I published an in-depth review of a thermal imager. It’s an interesting and very useful device. Then, while browsing the website of a Chinese store, I happened to come across a very attractive price for this instrument.

In May, I wrote a review of the budget Doogee X5 MAX smartphone. More than six months have passed since then, and now I have another “test subject” from the same company. I’ve been using my X5 all this time, so in this review I won’t be able to avoid comparing the two devices, even though they belong to different price ranges. Anyway, if you’re interested in the inspection, tests, and teardown, read on.

A few months ago, I published a review of a small engraving machine. In that review, I pointed out the design flaws and mentioned that I planned to fix them. In this review, I’ll cover the parts for the machine, add a little theory, and show the upgrade process.

I got my hands on a rather interesting charger—or, more accurately, a power supply. But this name has become so firmly associated with this category of devices that it’s probably easier to call it a charger. As always, the device has its pros and cons, which I’ll show you. I’ll also take it apart and give you some information on how to choose power supplies and chargers properly.

Last month I reviewed a Milwaukee cordless drill/driver. I also mentioned then that it wasn't the only tool I had for the M18 battery system, and now it's time to take a look at the next one. If you're interested in a tool that's not exactly cheap but is definitely interesting, read on.

Not long ago, there was an "unbelievably generous sale" of set-top boxes with an Amlogic S905X processor, 2 GB of RAM and 16 GB of flash storage. I couldn't resist either, and picked up a few.

These scales won't weigh a person or a stick of sausage, but they can (or at least should be able to) weigh things their “big brothers” can't. So today we're taking a look at and testing a miniature scale for weighing very light objects.

Some time ago, one of my readers contacted me privately and asked me to do a small comparative test of several thermal interface materials. I was interested in doing a test like that too, especially since I'd already done something similar, so I decided to help out. But as it happened, the idea grew into a somewhat bigger test, albeit a rather unusual one.

I’ve already reviewed a couple of inexpensive cordless drills, and in the comments people told me I’d be better off sticking with products from reputable brands. Well, this time I’ll show you a product from the opposite end of the spectrum: a tool from one of the best-known brands in the US, and a fairly well-known one here too—Milwaukee.

I think some readers still remember my review of a kit for building a linear bench power supply. Despite a few shortcomings, the board turned out to be quite interesting. When a friend sent me a link to the kit reviewed here, my first thought was, “That’s the same board.” But in reality, things turned out a little differently. Anyway, if you’re interested in this kind of thing and want to find out how to build a small bench power supply, read on.

I use a soldering station with a hot air gun quite often. But since the station is rather bulky, and lately I’ve only been using its hot air gun, I decided to replace it with a standalone hot air gun, so to speak. Inspection, teardown, comparison—as usual.

About a year ago, I reviewed a small rotary tool. Though why small? If anything, it was actually a large one :) It served me perfectly well for almost a year, but while working with it I found that it wasn't always convenient to use in certain situations. I mentioned the problem to an acquaintance, and he suggested a couple of accessories that fit my rotary tool. So today I'll be showing you both of them in my review.