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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.

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.