Electronics and technology blog    /    Materials for April 2023 year

Today I have a short review on a very popular topic: fuses. Yes, we’re talking about the component that, as everyone knows, is the last thing to blow. Of course, there are plenty of nuances here, and I’ll try to explain some of them.

Many of you probably remember that I’ve had just about every converter model from Riden, or RuiDeng, pass through my hands. To this day, I’m still not sure which name is correct. After the RD6012P came out, I’d check from time to time to see what was new, but unfortunately, nothing had changed; the hybrid 6012 was still their latest model. Then, just today, I spotted a new product, and I’d like to share the announcement with you.

Some time ago, one of my subscribers sent me a power supply—or, more precisely, a charger—not for repair, but for testing and review. But what’s actually more interesting is a certain “special feature” I’ve wanted to tell you about for a long time, but hadn’t come across a sample to show. To get ahead of myself, everything turned out better than I expected :)

Another power supply has come my way, this time from an SVEN SB-550 active speaker system. The repair is fairly routine, but still interesting in its own way, and involves replacing the PWM controller with a non-original part.

This review—or article, whichever you prefer—is a continuation of my write-up on modifying a power supply to turn it into a low-voltage UPS. Last time, I covered a 150 W power supply and complained that the LRS-150 turned out not to be a very good fit for this purpose. So, let’s see how its bigger brother fares.

The other day, someone brought me a power supply to repair. Well, not exactly for repair: it had already been repaired and was working, but according to the person who brought it in, it was behaving strangely. The result was a little unexpected, and that’s what I wanted to tell you about today, since I think anyone could run into this “quirk.”

As I mentioned earlier, next up is putting the PSU-UPS adapter board to use. Along the way, I'll also review the Mean Well LRS-150 series power supply today.

Not long ago, I posted an example of modifying a Mean Well UPS using my own board. That time, I used an older version of the board, which had some drawbacks due to the simplicity of the circuit design. Today, I’ll show you the new version of the board, which addresses the shortcomings of the previous design.