Hi.
I have a stepper motor connected to my Arduino Duemilanove
through an Adafruit motorshield.
I find that the motor is horribly underpowered. I'm not
doing anything especially difficult with the motor... but it
is stopped easily under minimal load.
Am I doing anything wrong? Is there a way to add an
external power supply while still using the motorshield?
Thanks for any advice.
Paul. 
