DROK DC Buck Converter, 5.3V-32V to 1.2V-32V 12A Adjustable Power Supply, 5v 9v 12v 24V 30V 32V Step Down Voltage Regulator with LCD Display Volt Transformer Reducer CC CV for RV Solar Panel Golf Cart

Having read through a few reviews, I wondered what I was going to receive. Well, as noted elsewhere, there is nothing on assembling the parts, which is honestly not difficult. The only annoying part was removing the protective covering from the plastic. It was date stamped 2023, so the adhesive was maybe a bit more of a problem than it should have been. It was not easy to get a corner to let go, but once it did, it just peeled off with no problem. There are a few complaints about the tiny adjustment screws. Well, this really is not intended as a variable bench power supply, even though some people are apparently trying to use it as such. In a set it and forget it use, it works just fine. The other complaint was that the (output) voltage reading is incorrect -- well, within 0.1V it agreed with my Fluke meter. No problem at all. What I wanted it for was to use a lithium ion battery with a portable radio (Elecraft KX3). 12V Lithium ion batteries are constructed with either three or four cells. With four cells the voltage varies between 12 and 16V. 16V is too high. With 3 cells it varies between 9 and 12V. 9V is too low. So I set this at 14V and max of 4A (actual max is nearer 1.5) and tried varying the input from 9V to 16V. Output was perfectly stable at 14V with the radio operating perfectly as it switched form Buck to Boost. Honestly, I was surprised at how well it works.

Perfect setup for the continuous current/voltage control I needed for different projects. Easy assembly and robust/quality assembly, working great so far! thanks for and excellent product

This is a very nice step down power supply with an easily readable blue backlit input and output, voltage and current display. Well constructed, 15 minute self evident assembly required. Works excellently as a charger for an SLA battery from a solar panel (mine 18V). I set this supply to float the battery at 13.65V. I set the output current limit to 0.50A. When the battery reaches the float voltage, the output current drops to 0.00A. Any load on the battery is immediately made up by the supply. The display is powered by either the input or by the output (when charging a battery). I measured 17mA of current to power the display when the output was disconnected. The display only shows the current actually going out the output; input current and output current displays are always the same value. Warnings not to hookup inputs/outputs incorrectly (they supplied a huge diode in this kit but I did not use). The large font LCD display is designed to be viewed from an angle slightly below perpendicular. This is good when viewing laying flat on the bench-top but poor for a vertical wall/panel mount when viewing from above. This supply looks very impressive when included in a project.

I had a need to charge some LiFePo cells, so I was searching for a variable power supply capable of some amps. Most use AC, but my solar setup runs 24V. The prospect of going from 24VDC -> AC -> 3.65VDC, surely there had to be a way to remain fully within the DC realm. And this lovely device fit the bill. A DC buck converter is the name of what I wanted, and curiously, there doesn’t seem to be a super wide selection. I must say, this device is well done enough for my purposes. Could the terminals be a bit more robust? Sure. Could they ship a more expensive version with better cooling to support more amps for sustained periods of time? Sure. Is there a way to recalibrate it so the display voltage matches the actual voltage? Would be nice, although not that far off (definitely have a voltmeter on hand to check). But: for what they have, and what I need, it definitely serves its purposes. This is actually my second, I accidentally fried the output on my first by connecting a power source, but the thing still powers on and recognizes input voltage, and didn’t just burn up entirely. Maybe I will investigate what was damaged and resolder parts to revive it. But I was that satisfied with the operation of the first that when my own error occurred, my need persisted, and I had no reservations buying another. They are relatively inexpensive, and for my uses have not given me any problems. They also have some other devices (buck, boost, and I think a buck/boost), with different ranges and throughputs, so depending on your needs, they may have a model that best suits your particular use case.

I added a stereo system to my RV and assumed I could just tap into the existing 12v system that powers the lights and charges the 12v batteries. The stereo was getting very hot and powering off intermittently. Then it would even turn itself on randomly like in the middle of the night. I put a meter on the line and saw that the voltage was cycling constantly between 11.8 and 14.8, which may not adversely effect the big 12v batteries or the simple 12v lighting, but this Kenwood stereo was another matter. I shopped around and found this to be the best value for the money so I ordered it. I set it up and installed it directly behind the stereo and from that moment the stereo has worked perfectly. Since my phone is connected via Bluetooth, I generally leave the stereo on all the time and it never gets hot, never restarts, and never malfunctions. Love it!

Good to reduce and control both voltage and amperage. To the first time buyer, the instructions can be overwhelming, but after testing it out and putting it to use it is easy to understand how this item works. It worked well for my application to reduce the lithium battery voltage down to 12 volt car lead battery levels. Some items cannot handle the higher lithium voltage and this brings down the voltage and controls the amps to provide the needed wattage. I've order several to deal with items I don't want to "fry" and they all work like a charm. Recently, one was received that did not control the current, but I think that was a fluke! I will receive a replacement soon, and I ordered an additional one as well. This is easy to understand as other companies provide controllers that is hard to understand and not really sure if those will do what I need. To the common person, this one is easy. Voltage in, Voltage out. Then change the amps to get the needed wattage. That's how a simple common person thinks, and in the application, it powers my RV fan.

I got this one with the wrong impression it'd output up to ~30v. They make it look like it can provide anywhere between 5 and 32, from any voltage between 5 and 30 as well. I was trying to make a bench power supply. So I got a very good 12v 20a power supply to connect it to this unit thinking "Ok, it can range from 5 to 30v at least." Hell no, when I tried to crank it to 14v, it just wouldn't. For a second I thought I had messed with it somehow. I was going crazy trying to figure out what it was. I had to read all the description more carefully. Well, it turns out it says, somewhere it says very casually that the input needs to be more than the output! THIS IS JUST A GLORIFIED STEP DOWN. That's useless for me as I need to power things ranging from 5v to 28v. If this thing is just a step down, IT SHOULD SAY SO! This is so misleading. I'm not an electric engineer. If I was, I'd probably would've known stepping down and up is probably not possible with the same device. I learned it the hard day... if this was only a bit more honest and call it it in the description, instead of casually saying in parenthesis "oh by they ways, it needs more power than the expected output. It should say: STEP DOWN BUCKLE WITH SCREEN. Now my whole setup is ruined. I'm just going to try to return it and buy a Bench Power Supplies. How disappointing.

Very practical converter. Can be used as a mini variable power supply with current limiting capabilities.