4 Pieces Adjustable LM2596S DC-DC Buck Converter Reduced Voltage Regulator Power Module 36V 24V 12V to 5V 2A Voltage Stabilizer with Digital Voltmeter Display

Great little voltage reducers. I use them in my DIY speaker box builds when I need to reduce down to 12v for LED’s.

I used these to convert all of the fans on my Ender 5 Pro 3D printer to much quieter 12 volt fans. I have 1 for the PSU fan, 1 for the main board fan, 1 for the hot end fan, and 1 for the part cooling fan. I use my printer a lot so it's running almost non-stop and after a year plus a few months of use they all still work.As a side note, the fan speed control on 3D printers uses PWM, so it changes fan speed by pulsing the power signal on and off, but the output voltage is the same. As a result, when the fan power is set to low speed the signal is off more than it's on, and as a result the display on this converter won't turn on, but the converter appears to still be regulating the voltage fine. Just make sure you set the potentiometer while the converter is getting a constant 24 volt DC (fan speed set to 100%).

Using this buck converter to go from 24vdc to 12.5vdc in my Bambu Labs X1C to run additional LED lights inside the enclosure. Paired this with a simple 1 stage relay, controlled by the factory LED strip, so I can use the software light switch that is built into the X1C program. The buck was easy to setup and adjust the output voltage, but in testing and use, the PCB and MOSFET get hot to the touch when in operation. Not sure of the exact temp, but the buck was too hot to touch after about 5 minutes of operation. Other than the heat produced, the functionality of this buck converter is satisfactory so far. Would recommends.

Bought for future project. Good apparent quality.

Voltages on the one unit I tested tracked amazingly well with my bench power supply, probably within 0.2V. No load current was under 20mA up to about 30V input, increasing to ≈30mA with the display on. A long button press extinguishes the display. Due to the quiescent power draw, I wouldn't use it for charging a battery composed of cells smaller than 18650 liIons.

Extremely poor quality. Electrical Engr here… One card had incomplete soldering of components. ALL 4 Did not work. Probably due to chip damage at import with x-rays or similar spike. Spend a little more and get one that works.

Works well to get automotive sensors to operate on a bench top training display.

I had AirTag units in each of my cars and my parents' cars. If I was gone for a long period, the AirTag would run out of power and become useless in the event the car was stolen. I opened the AirTags, soldered these units to them, and now they work great without the worry of the battery running out. I installed them directly to the car battery with a fuse.

I wanted these for my 3d printer, so I could attach 5v and 12v fans to my 24v power supply.They're really easy to set with the display which shows you the output voltage and they seem to be pretty accurate when tested with a multimeter.You can also turn off the red 7 segment displays but there is a quite bright blue LED which is on at all times. You could just desolder it I guess if it bothers you.I haven't bothered to really test the output to see how clean it is since I'm just using it for fans but they're easily set up when you just need to get the job done. I've had a couple of them running for a couple of months now and the fans are still working so I guess theyre still good.These being adjustable have an added benefit that if you want to run your fans a little quieter your can run them at a slightly lower voltage, e.g. 10-11v for a 12v fan.

DO NOT BUY THIS PRODUCT! I have had 3 of the 4 screws on one of my boards completly fail and the wires fell out causing a arc. They have used cheap metal for the screws on the terminals and they strip after one use. terrible product.

Does the job. Testing the output and its accurate. Strong well made. Good display. Bright red leds. Good value

They are ok. The instructions on here are better than what comes in the package. Did the job they were needed for.

I needed these to modify my 3D Printer, I'd try smaller ones that lacked a display, and had to use a multimeter and a screwdriver I wasn't comfotable with, those ones also died easily. But these ones, even though they're much bigger, I'll happily take a bigger board if it means easier wiring and adjusting.I have used 2 of the 4 I purchased, and both worked perfectly. I am absolutely pleased with my purchase, and may even buy more in the future.