Quote:
Originally Posted by BitTwiddler
If the diagram is correct, the ground wire from the Arduino board is connected to the +5 V in of the Victor. In PWM, the ground and signal are on the outside wires and the +5V wire is on the inside.
Don't know if this observation is helpful.
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The center +5 wire is required when using a PWM cable to control a servo (that's how the servo gets its power)
BUT
Only the GND and Signal (outside pins) are required for the PWM input to the motor controllers. The center pin goes nowhere and does nothing.