DROK DC Buck Converter Adjustable Voltage Regulator 12V 6V-32V to 1.5-32V 5A, LCD Screen Step Down Converter with USB Port and Protective Case

Excellent stepdown. I was looking for a unit to lower the voltage(speed) of a brushless 24 volt fan and this worked perfectly. I was able to slow the fan down to 12 volts and lower the noise from the fan. I looked for awhile and this unit is excellent for lowering the voltage (speed) of a 24 Volt DC fan. I highly recommend it.

I've bought multiple of these for various projects, but primarily for stepping the power output from my solar/battery powered security cameras from 24v to 5v. They've been working flawlessly for 2 years with zero maintenance or adjustment required.However while replacing my generic analog thermostat with a smart one recently, I found I didn't have the 24v line required to power the new digital controller. What I had was a 5v wall charger and one of these adapters. I removed the circuit board from the wall adapter and mounted it inside the same box this converter comes in. It barely fit but it fit! I tapped power from the 120v line from the A/C unit into the 5v transformer, then patched the 5v output to the input on this converter, set the output to 24v and it's also been working fine for over a year. While I realize that I could have just bought the 24v adapter, I wanted to finish the project before the weekend was over and this got me there. It's still working so I see no need to swap it out.

This thing is going to save me money!It works just as described and I haven't had any issues yet.

This unit has been working fantastic for a few years now, but... The USB port is tied to the output voltage. I have mine set to 24V to power a PLC, That means the USB port is 24V also. USB ports are normally 5V. If you plug in, (say your phone), and the output is set to any voltage other than 5V, you just fried your phone. Its not obvious at first, although in the documentation it does state that the output is terminal and USB. If you pay attention to the paperwork, its not hard to figure out. Nowhere in the documentation does it say the USB is 5V. It would, however, be easy to assume that USB is universal, and brick something valuable as a result.

The directions that come with it are virtually crap. Your best bet is to find a video like i did (unless you know and understand electrical operations, which i didn't).The wiring was very easy, but you need to build the housing, and hat ended up being the first nightmare as the directions were not helpful.The second, make sure you have a very, very, tiny flat head screw driver. As I even struggled with the YouTube video (a tiny bit), I decided to say "F" it and just start turning the screws. The left is the volts, and the right, as far I can tell is for... I dint remember. I just know I turned that one around 30 times before it did anything.That said, it works great. I'm running an old laptop power supply to my HO train set. As it is putting out 19 volts, I had to get it down between 12v and 14v continuous power. It works perfect for that. I'd buy it again.

It works as a step down in voltage but it is not accurate. Input voltage was .1-.2 low and output was .2 high. There was no way to adjust those errors. The instructions provided with the unit didn't work. Their website didn't work. Internet search found the majority of opinions verified it wasn't accurate but for their purposes it worked. A consensus reported it was "cool" looking. I returned the item. You can buy something similar and cheaper it you don't mind the similar error rates.

I have only had this for a few hours, so I hope it lasts and I hope it’s reliable. But using it for just a few hours, it is simple and it works perfect! I want more! My application is very low current draw, just for low voltage solenoids but it definitely works. Thanks!

well, the output does adjust the shorted current is 2.5a. you cannot have 2 outputs, different, the usb reflects what it is set at, if you put it at 12v, the usb will not turn on until you make it 5 and also it will not power up a RPI. I was buying this thinking I could use 12v out AND 5v usb but I made an error. other than that its OK for the $$. it'll charge a usb device with current limit so that's OK too. just an FYI