Dorhea MT3608 DC-DC Step Up Boost Power Converter - 2A Module, Adjustable Step Up Voltage Regulator Board - 2-24V to 5V-28V Output Voltage (Pack of 10)

These worked well for my use case of driving a 12v LED ring from a 5v 2A USB port. At first I thought it was broken, then I RTFM and saw the part about the 20 turns. Now it works great.

I saw the copious negative reviews for these, but they were dirt cheap so I gambled anyway. I rapidly tested three modules on my bench just to see what all the fuss was about. They all worked perfectly fine. Even with 3.4V input I could take them past 20V output at moderate load. At lower voltage delta, I could push them past an amp. Yeah, voltage will sag at high loads, so adjust based on your load. Voltage was reasonably stable for a given load and pot adjustment. At certain points I could hear some switching harmonics, but that’s normal. I think people need a reality check. You want a truly constant voltage power source? You ain’t getting it from a <$1 module. Sure the listing rates these at 2A, but also use some common sense. That’s probably an intermittent maximum rating and it very much depends on how much of a step up you are asking the little device for. More realistically, put a realistic power expectation in your head and understand that you need to derate as you increase the step up. I tested 12Vin and 16Vout with 2A output and had no issues. Efficiency drops as voltage delta increases. It’s a tiny little switcher IC and there’s no heatsink. Play stupid thermal games with it and win stupid thermal prizes. You want a comprehensive datasheet with exact thermal and load ratings? Go spend more money or build your own to spec. If you don’t understand that most trimmer pots are 20 turn, don’t play with module level components. If you just want a really cheap way to step up a voltage and you have realistic power expectations based on the size of this little IC, hard to beat these.

Two of these failed immediately. Other two worked for a while. I am using 2 of them simultaneously for two circuits up-converting from 12V to 24V, powering a 16W circuit. But both of them failed within a few hours of use. The failure resulted in them producing only the input voltage at the output. I am on the last one (of the 5-pack) and I expect it to fail as well. Very unpleasantly surprised. Actually heavily disappointed. I removed 1 star for each failed board from the 5-pack. The ad says that these up-converters work with loads up to 2 amps. I am using them only for 0.7A each so they should be able to handle that just fine. But they do not. I requested a replacement package, foolishly hoping that another batch might work better. I will post an update once I test them out. Though I should not fail to provide more details about the up-converters. They come with nice pre-drilled solder pads, they are big enough for bigger wires for 2 amps, that is a nice touch. The adjustment trim-pot is pretty funky, the quality really is not good because when it is turned maybe 1/4 turn, the voltage barely changes, then it is just barely touched and now the output voltage jumps an extra volt. The trim-pot operation simply is not smooth enough for fine adjustments. Otherwise, once the trim-pot is adjusted, the board holds the output voltage well, no big deviations, maybe a tenth of a volt but that's also the reading error on my DMM so it's hard to tell. Size of the boards is acceptable and as advertised. If I ever get any that will actually stay working, I will slide them into a 1.5" heat shrink sleeve for protection. As far as the refund goes, I have been waiting almost a month. I have neither the boards, nor my money. On the product returns page, Amazon indicates when I should receive the refund. Whenever the date comes up, they move it out. The return page shows "Refund issuance is delayed". No explanation. Amazon is pretty good about issuing a refund once they receive the merchandise but they've had the boards 2 weeks and no refund. I wonder about their actual procedural policy and why the process is stuck. Disappointed on this front as well.

These things are easy to destroy by accident. I applied 7v on my first one right out of the box and definitely destroyed it. They are really finicky and the processes for adjusting them is very specific. While the first was my own fault, I watched a tutorial after and I still couldn't get 2 of them to work. That left me down three out of the ten. Still enough for what I needed and price and shipping time were very good which is why I decided to give it four stars instead of three. I am just a little disappointed that two seemed DoA. First, you have to apply a load (use a meter or voltage display module) and 3v DC in. These things are calibrated to the lowest possible value out of the box and exceeding the minimum voltage by a volt or two can ruin them. Rotate the adjustment pot counter clockwise until you see a voltage increase. This can take half a dozen to a dozen rotations. Adjust until the output reaches the target voltage you have in mind for your product. Once you have it set, disconnect it from the 3v power supply. It's now safe to connect any supply (that I assume doesn't match or exceed the Vout) you set and changing it after seems to work fine. When doing the initial setup, I found sometimes be as little as .1v under or .2v over seemed to prevent the calibration logic from kicking in. Once the logic kicks in for the first time, adjusting it is easy.

Hello I purchased the MT3806 so I could boost my 9v to 11volts DC. My intended use was for raising the voltage of an original Made In Japan CE-2 guitar pedal. My first thought was that the MT3806 was small enough that it could easily be hidden, and I could use heat shrink on it to hide it. My first attempt to use the MT3806 was a failure, it literally sparked, burnt and caught on fire when I turned on the power. On guitar pedals the Center is Center Negative so I reversed the VIN- and VIN+. After that it started working but the voltage did not change at all. I returned to Amazon and read the reviews and started with another brand NEW MT3806. The great part is they are very affordable(cheap) and it doesn’t hurt my wallet to try again. I tightened until the thread ran out and clicked(no voltage change). After that I began to lefty loosen the Screw type potentiometer. It took a long time but it worked towards the end of the screws thread. I was able to regulate the output voltage to 10.76vDC from an input of 9vDC. Of course I do think and I also know that I don’t intend to use a load greater than 30mA. Worked out great, no issues, no noise issues either in an audio device.

fast delivery; works per spec

Does not go down to 2V input. I needed 12V / 0.4A / 5W output, and I wanted to feed this with a 1S lipo battery potentially down to 2.7V. The lowest this module would accept as input was 3.4V before it stopped working all together. Tested several of them with an external power supply. When I boosted it to 5V instead of 12V, it was able to go down to 2.5V. I guess it's limited by a 2A limitation on the input. Partly my fault for not thinking about that but not quite satisfied.

Works great, but I accidently burned up 2 of them connecting them to a power source that was not limited to 2 amps. I'm using them on rc cars to step up 6v to 24v for some led strips. Power them from the bec of the reciever instead of directly from the battery if you do the same thing. These have a good amount of voltage ajustability while being small in size and a pretty good price so I would easily buy more if I need to. If you know what you're doing it's easy to use and easy to tune the accuracy of the voltage you want. (Don't worry it's just a temporary setup; everything will be soldered when it's done)

It works well, you need just to turn the POT until you hear tik and then it will work

Quality is good

I had the desire to reliably control my Noctua 12V 0.6Amp fan, but when powered from the wall-mounted, socket with a USB port (5V, 3.1Amp max supply). The fan works brilliantly within the full voltage range between 5.2V-12V. I am very happy with the purchase as the unit does not heat up at all and is stone-cold even after 3h of continuous work. The pot is quite sensitive, circa 2 turns per Volt Little side note: Comments sections are really entertaining: it appears that only a few people had sufficient grasp of knowledge, that from 4.2V LiPo battery, even if you connect four of those boost units, you will not get reliable 110V AC ;) On the other hand - always choose the boost applicable to the project. Happy tinkering, guys.

I use these module in a product I sell. I need a source of 20V from the internal 12V supply. They are simple, convenient, readily available and inexpensive. So far, they have been reliable and easy to use.