I have 2 lego Mindsorm NXT motors like those one: I have cut a lego cable and I have found the schema if the cable for the motor here: Cable schema
And i would like to be able to: - Move my motors in both direction - Control the speed - Check the current position (if possible)
But I really don't understand how to do that witht the motor shield. If I put a simple tranfo 7,5V on the white cable and the black cable the motor turn in a direction. If I invert I move in the opposit direction. If I change the voltage the motor turn slower.
I have connect my transfo on the blue connector on the right side.
Thanks for helping me.