khimm19:
so i cant use the 5v pin of arduino? so it means i need extra power supply just for the servo?
Even tiny servos like this are up in the 750mA area, too hungry to power off the Arduino.
From time to time I run a tiny servo like that off the Arduino just for a quick test, and it sometime resets. So it's never a good idea.
So yeah, it's very clear that you need some substantial external power supply for yours.