DROKBuck Converter 12v to 5v, 5A USB Voltage Regulator DC 9V-36V Step Down to DC 5V-5.3V 5.2V 3.5-6A Volt Transformer Power Supply Module for Phone Fast Charging

As described, fast delivery, worked as expected. Used for a hobby project. Would buy again.

I’m into electronics and need a 5v supply to mod a Bose Wave Radio. The minus supply and output rails are common and is exactly what I needed for my project. I removed the usb connector and soldered the wires to the usb output in order to miniaturize the board. Works perfectly. I bought 4 as a set. Now, I have 2 left over.

I am a working musician and was putting together an effects pedalboard, when I noticed my wireless unit (Line 6 G10) actually runs off 5VDC through a USB cord instead of the more typical 9VDC barrel plug. After a brief search I discovered this little converter that will take various voltages and convert them to the needed 5V, so I purchased one, hoping for the best.I wired it into my pedalboard power supply, fired it up, and tested the voltage as a precaution - 5VDC and some change - exactly as described. I tested it with the wireless unit and it worked perfectly.The *only* drawback I can see to this product is that there is really no easy way to mount it - I didn't see any sort of project box sized for it. I modified an empty Altoids tin, Velcroing this adapter in place inside with plastic surrounding it to prevent contact between the board and the tin. I then Velcroed the tin to the bottom frame of my pedalboard.Works like a charm.I really didn't want more than a single power cord to my pedalboard, and this converter makes that possible. Highly recommend to anyone needing USB-level power from other DC voltages in a neat, convenient package.

Great converter. It lacks holes for mounting screws, so fixing it in a box can be tricky.

Amperage is ok, running small wireless cameras from this 5V output, from a 12V 8AH battery. Lasts for days. Much better conversion rate than a 7805. Not even comparable.So far this unit has performed. Had a bad camera that made it look as though the buck converter was failing. It was not. It was the esp32-cam card, it eventually fried.

Works for me. The USB connection is very useful when connecting to a Raspberry Pi.

No ability to say input wasn't enough for QC3.... Fed the part 32V at 5amps max on my supply...Max voltage it can receive. Same results at 24V....It's a 5V regulator, that's all. It is no longer a QC3 device with high ratings.Part has changed to a cheaper part.SCAM SCAM SCAM. I could get the same for half the cost. Lasered part numbers so you cannot proof the design... Straight up 5 Volt 1.2 Amp 10 year old Junk being sold as QC 3.0. Swapped device to ride a different device... 10 of 11 images show a different part! Now add mine!

Almost 1 & 1/2 years ago, I ordered a 10 pack of 3.2v, 50ah, Prismatic Lifepo4 cells from an online vendor. With 8 of those cells I built a 100 amp hour LiFEPO4 battery. But I had 2, 3.2v, 50ah cells remaining that I did not know what to do with.I started wondering if there was a USB module that would accept an input of a minimum of 6 volts to which I could connect the battery to charge and power USB devices. Then I discovered the DROK USB DC-DC Step Down Buck Converter capable of taking 6 volts minimum and converting it to a 5V QC 3.0 Charging Module. I read the reviews, good and bad...bad to see what people were complaining about, and decided to buy a set of 4.I figured that the converter module should work as a USB charging device when connected to the 2 remaining LiFEPO4 cells if the cells are wired in series to produce the required 6+ volts. (See the first picture of the 2 LiFEPO4 cells connected in series with one of the 2 connections coming from the converter module connected.)The second photo shows both wires connected, and the blue illuminated LED on the converter module. You can see "78% 10 m until full" on the screen of my phone. The third photo shows the charging symbol on the screen. It shows 79%. Sorry for the fuzziness of that picture.I used a few of the converter modules to charge my phone and tablet for quite a while over the last few days. I wanted to see how warm they would get. The converter module does get warm, but not too hot to handle...unlike another similar product that got far too hot to be safe. And that was only at about 1 amp of current output. I'll be submitting a brutally honest review on that one soon.I foresee finding an appropriate container in which I will cut holes for the 4 converter modules and the the 50 amp hour battery and use the power source for a portable mega-USB charging station. I'll upload pictures when I get around to making it.I am very happy that my idea panned out!