20A Power Supply Module DC-DC 6V-40V to 1.2V-35V Step Down Buck Converter Adjustable Buck Adapter CVCC Constant Voltage Constant Current Converter LED Driver

This power supply feels really sturdy and well-built. It outputs power very consistently and has a wide range of voltages. The small potentiometers can be tricky but do work well. Everything is as-described and should work well in any num er of projects/applications.

Very easy to use and quite versatile. I tested this for driving various heating wires/tapes, high power LEDs, charging lithium batteries, and even controlling a ZVS driver. I've found it to have very stable current and voltage regulation over a range of output currents (500mA to over 12A), and it has an efficiency of around 86-91% in the cases I tested. Overall it is a very robust and useful little module and well worth the money.

did not work at allfound smd component loose on one endresoldered and the device now works fine

I suppose if all you want to do is simply step down to one constant voltage this will do. But if your looking to modify power supply's or build one from scratch, don't get this one! No where near as precise or versatile as others even from Banggood. The quality is horrible, looks like it was soldered together by a 12 year old. I got two because I almost always wish I got 2 when I order just one. I will keep them as they are not defective, just working junk. And I can always use them to show someone how not to solder.

I am trying to pick a buck power module for my hobby project. So far it is the best fit in terms of cost and performance. The efficiency is good around 90% based on setups. 4-6 degree c increased from ambient per amp measured on the fins of heatsink. Requires 1.3v on input side higher than desired output. Two little tiny things, input side pcb is hotter than the other side; the barrier terminals will wiggle a little bit, but those didn’t bother me.

Device works really well with nice control...I received a faulty unit (1 of the 2 I received)...it worked at first then just quit as I was adjusting my project...wiggled it and it came back...wiggled it some more and it quit again...I inspected the board and saw that three of the legs of the main chip were unsoldered - obviously the solder paste application was lacking...I probably could have tried to remedy, but chose to return to Amazon - I got the replacement the next day - it worked fine...

This buck converter works great, the adjustable voltage and current are decently accurate and they don't fluctuate with time or temperature. Overall a very decent little buck converter with a high current capacity.

So far my failure rate out of buying 5 is a 2 out of 3 don't work in various ways. I'll start with that...The only honest problem I have with these is that out of the 5 I've bought over the past few months 1 was DOA and the other was finicky. With the finicky one, basically something isn't connecting well on the PCB or there's a flaw in a PCB layer or something. I've looked at all the solder points and it looks ok? But if you twist the board it turns on, if it gets bumped it turns off. It was like this when it arrived. The other one that was DOA basically just never turned on.I'm building an RV van and I'm using this step 24 volts down to 12 volts for the PC. The point of this preface is to emphasize that I need stable solid high wattage power to be delivered to my PC. The fact that these are $15 (or at this rate 15 * 5 / (5 - 2) = $25 with my failure rate) a piece and can power my 8700k and another can power the 1080 GTX is pretty incredible. I've also added some cheap 50mm fans to the top as they say that's suggested for anything over 100 watts and they've been great.