The usual way to externally power a servo. If you power the servo from a 40ma pin, the servo won't move. If you power the servo from the arduino 5v pin, the arduino will probably reset due to low voltage and possibly damage the arduino.
The usual way to externally power a servo. If you power the servo from a 40ma pin, the servo won't move. If you power the servo from the arduino 5v pin, the arduino will probably reset due to low voltage and possibly damage the arduino.