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58% OFF 3pcs DC-DC Boost Buck Adjustable Step Up Step Down Automatic Converter XL6009 Module Suitable For Solar Panel US$4.99 US$11.99 View It

Overall:

wgc4 19/02/2017

I ordered three of these modules. I had never used them before, so I hooked them up to a basic adjustable power supply and measured the output while I made adjustments to the trimpot. I was having problems with the output voltage on the first one I tested, where it wouldn't go below 9.5V, even with a 5V input (I needed 3.3V). The step-up still seemed to work fine. I tried to figure out which component failed, but I never did. I even removed the trimpot for testing and resoldered a couple of surface mount resistors. I tested the second one, and it worked fine. I tested the third one, and it worked fine, but while I was adjusting the trimpot, I encountered the same problem and it jumped up to 9.5 V. I think this was probably due to an error on my part. I think that my alligator clip probably slipped and shorted something out. This also led me to believe that I probably killed the first one in the same manner. My advice is to be very careful when using this module, and to solder wires in place before testing. In my case, I feel that the error was on my part, and I will be ordering some more in the future, since they are inexpensive. Also, the circuit boards on all of mine were misprinted as part DSN600AUD instead of DSN6000AUD. Other than that, they are identical to the one in the picture.

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