Buck Boost Converter Adjustable Voltage Regulator DC 6V-36V to DC 0.6V-36V, Step Up Down Power Supply, Voltage Regulator Constant Current Reverse Protection Short Circuit Protection Regulator Module

I like the panel mount design on this unit. I was easily able to design and 3D print an enclosure for it to snap in to. In my pictures you will see I made an enclosure that snaps into my Ryobi batteries. I make almost everything I have powered by Ryobi batteries since I have plenty extra over the years from yard and power tools. I am a hobbyist electrical engineer and I like to make portable gadgets. I purchased this unit because I wanted something that could adjust to any normal voltage I might need. I used speaker terminal spring connectors on top to easily insert any wire into. I made a simple cable with speaker wire and a DC barrel jack. With different barrel jack adapters I can make this charge most anything I have. The orange device you see in the picture is an old Bluetooth speaker that requires 12v 3A and it charged it just fine. I have lots of handheld ham radios too. Most of them charge at 10.5V and it had no problem. This unit works up to 80Ws as advertised in its spec. I don’t have anything that would likely ever draw more than 40W but the extra room is nice. Typically if you max out power on a unit like this is gets very hot and isn’t ideal for long term use.For those reviewers saying they can’t get the wire to stay it is just a basic screw terminal. It’s not unique with this device. Screw terminals can be tricky to work with depending on the type and size of wire you are using. If you are using stranded wire I would first recommend to twist the ends and solder them so they become solid. It should hold in there just fine. Stranded wire that is not soldered is always hit or miss with screw terminals. If you have solid wire and the gauge is large enough it should work as is. If you have solid wire that is lower gauge like I typically use (22AWG) then I recommend taking pliers and bending the tip of the wire into a loop. When you stick it in a screw terminal now it should have a much better grip. I haven’t had any problems with the connections holding.

Used to control a variable voltage DC motor peristaltic pump. Surprised by the number of features that this little buck-boost converter has, including things like input voltage readout, plotting voltage and current history, and a number of adjustable limits including a stop timer. Easy to use (turns on by itself when supplied power) but a little clunky having to cycle through each digit position to adjust voltage or current. Would have been nicer to have different short-press and long-press selection options instead of having to wait to deselect a menu option. That said, great value for $16 each, really can't complain given I got more features than an old benchtop power supply for the price.

Works but not instructions

have to return the first one because came defective, however seller send one back. This is a great device to make your own variable portable power supply. I'm surprised the number of features that came with it, not that fancy but it help you to understand more when you use it. So far so good this unit has been doing the job. Not 100% accurate but is pretty close.

I bought this for use with some ham radio gear I have. It does a good job and has great functionality. However, I wish it came mounted in a box. I bought a box to mount it in and mated it with powerpole connectors. It worked out fine, but took some time.

Like another reviewer mentioned I had to take it apart and add thermal paste to the back of the heatsink. Before I did that after sustained use at over 4 amps it has trouble staying cool. It's fairly ready to use except that most of the UI uses abreviations. I installed mine into a project case that I also purchased from Amazon to make a diy bench power supply from an ATX power supply.

Cooling fan went bad in first hour of use under a 3.2 amp load @12 volts. Heatsink is poorly installed with only screws and no thermal paste or tape causing over temperature protection at less than 3.3 amps but with using thermal paste and a working fan it does great. No instructions but perfect for the hobby/tinker person. Has input voltage protection meaning it will turn off if input becomes lower than set value which is great if your using batteries as a source, especially LiPo batteries. If you know what a smoke saver is, this is for you. The replacement sent to me was used, burned and in pieces.. so it could be great or absolute CRAP.. luck of the draw. Just remembered you get what you pay for, if you want something high quality you need to spend more.

Purchased to use with a small (20aH) lifepo4 battery. Used in conjunction with a dc power source and the appropriate settings, cc/cv mode makes a capable charger for the lifepo4 battery. Can also be used to power/charge various dc devices ranging from 0.6v to 36v from the 12.8v lifepo4 battery 10 programmable preset profiles simplify device switching.