I wanted the Ardunio to be able to control a Servo. The problem to overcome is that the servo runs at 5.0v and the DUE can only accept 3.3v on it pins. So supplying a 5.0v to the servo, the signal (yellow) cable can probably go up to 5.0v as well.
The solution was to use a Sparkfun Logic Level Converter. here
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