MT3608 DC-DC Step Up Boost Power Converter 2A Module Adjustable Step Up Voltage Regulator Board 2-24V to 5V-28V Output Voltage Mico USB Compatible with Ardu ino (Pack of 10)

I received 10 boards and tested 1 of them and did not work with 4.1v input. No change in output voltage regardless of potentiometer. Tried two more boards and they are the same. The boards should work with greater than 2v but did not work. I am returning them no point of checking remaining 7 boards. After further testing none of the boards are defective. The issue is that you need to turn potentiometer at least 20~30 turns all the way both sides and at one point output voltage will increase. Turn until u hear click sound. If no change then turn opposite direction and it should work but many turns in that direction.

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.

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.

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.