DZS Elec 2PCS LM2596 DC-DC Step Down Variable Volt Regulator Input 3.2V-40V Output 1.25V-35V Adjustable Buck Converter Electronic Voltage Stabilizer Power Supply Module

Tiny, solid, and works as description. Buck resistor and inverters. Nice simple circuit.

Works well, used a multimeter to tune the voltage and it seems to be working well

This little buck converter was perfect for my needs. I modified a Power Wheels Jeep for my kids and bumped it up to 24V. However, I also added LED lights that run on 6VDC. So instead of trying to add a second power supply, this little guy allowed me to plug right into the 24V circuit and supply the LEDs with 6.25V.I was able to solder the leads easily using 16 gauge wire (I don't think anything thicker would fit into the PCB). The adjustment screw worked as it should, and arriving at my desired voltage was a simple task. I then encapsulated the converter in an old 35MM film canister (yeah, I know!), but it fit perfectly (I drilled holes for ventilation and for the wires at the ends).All, in all, I'm super pleased with this purchase, and time will tell how durable it it.P.S. There is a small red LED that stays on when the device is connected to a power source, I wish the specs listed how much current it's drawing though.

I purchased two of these a couple years ago and they worked perfectly. I just purchased 6 more. No instructions are given. The adjustment screw MUST be turned counter-clockwise at least 10 times before the voltage can be adjusted. One of these 6 required 30 turns! You have to put a DVM on the output and monitor it for a change in the voltage downward to change the factory output. The way I learned this was to read the listings for other converters and found a couple that stated this procedure so I decided to try it on these. It's a shame the seller did not included this in the listing or send instructions with the product. Otherwise, they work great!

I'm using these to step down the 24v that my printer puts out to 12v for replacement fans. This works perfectly for me and it's small and makes no noise that I can hear. Yes, you do have to turn the screw quite a few times to adjust the voltage, but that's because it's a precision potentiometer. That's how they work. :)

The regulator has a 25 turn pot to dial in the output voltage. With that many turns, you'd think that it would be possible to very accurately adjust the voltage. Most of the turns on the pot have no effect at all on the output and only a very narrow range of the pot actually effects the output. I needed mine setup to provide 9.0 volts. There was a range of about a quarter of a turn that varied the output between 8.5 and 9.5 volts. I finally got it where I wanted, but I had to make many very small changes to the pot setting to get 9.0 volts. Before you install one of these, test it on the bench to make sure it works correctly.

Finally - a solidly regulated variable PSU module I actually trust. These seem to hold setpoint well and supply comfortably up to their rated power. Neat, well priced and easily fitted into a project, these are my go-to for a quick and clean power rail for lower voltage uses.Super-clean output means I even used one in a very high-gain tube phono preamp as the heater supply regulator, and it's the quietest I've built by far.Bottom line - when cobbling together a linear reg supply for a final/customer build would seem janky, this module does the trick neatly and at the right price

I was a little worried for how cheap they were but figured if they were junk it's only a few buck. But I they worked great just like they should