Passed 3 out of 5 so far. With no load I set the input voltage to 12V and the output to 24V. It didn't work long and burned out (blue smoke, U1 burns out quickly). The rest did the same. When I connect with Micro USB and 5V, it outputs 12V just fine (which is why it has 2 stars versus 1). They cannot work with 12V input as stated in the title.
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