Hi
Now I have a new question.
Servo works well with your code Tim, if I conect Yellow to I/O pin 5 and Black to NP2 Ground and Red to Np2 +5v.
But if I conect to external power the servo, it does not work. Red to external + 6v and Black to external " - ".
I have also tried, Red external +6v and Black external " - " plus I have linked the external " - " to the NP2 Ground so as to use a common " - ". Still does not work.
What could be the problem.?
My servo is a HS-5645MG .
This thread might help.
http://forum.arduino...?topic=117673.0
I have not hooked up a server to external power alone. I have always used this: http://www.adafruit.com/products/815