I am having trouble with 2 of my recently purchased MotorAir V2 - Dual Motor Driver Bluetooth Smartphone Remote Control Board - (Andorid/iOS). I have purchased 3, I have one working correctly and the other two I have work but only when connected via usb. It does not power up when connected to a DC power source. The same power source works with the one control board but does not power the other boards. What am I missing?
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If the polarity of the DC power source was hooked up in reverse, would/could this damage the board? Maybe this is my problem?
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Just so others can see the solution for future reference. It was the jumper between the DC & USB. It was set to USB. When I changed it it worked.
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