I have come across one of these stepper motors http://catalog.orientalmotor.com/item/stepping-motors--1068/pk-series-stepping-motors/pk243-01aa?&seo=110, but I'm not sure if it's the unipolar or bipolar model. There are no markings on the motor to indicate bipolar or unipolar. It has six leads, so based on my reading, I believe it is unipolar? How can I tell which one it is?
Based on the spec page, it looks like it runs off of 4 volts at 0.95 amps. This is drawing too much from the Arduino, correct? I'll have to supply power externally, right?
Which chip will I need to control this with an Arduino? UL2004 and this circuit seen here? http://arduino.cc/en/Reference/StepperUnipolarCircuit