I tested it when I received it and it was fine. I hooked up two 5vdc motors to it, got some Arduino code and had fun making the motors do different things. I pulled the yellow jumper so I can power the Arduino separately from this motor driver. To power this driver I had an AC-DC converter that plugs into an electronic device that I no longer use. It outputs 12V DC, which was enough for the motors I was playing with (I cut the connector off the converter). and its soldered). stranded wire to make strong connectors that I could plug into the card's PWR_IN port) Note the max pull of 600mA, I figured a few steps from a 1.6A stepper motor wouldn't hurt to make sure that some The new stepper motors I bought works. In just a few steps (literally milliseconds) the chips on this card got very hot! Although the card was received normally, but, um, don't do it. (Search Revain for L298N if you want to test stepper motors up to 2A). So it works great and has even withstood some abuse for a great price.
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