user6298: I need to use two stepper motors to move microscope positioning knobs in the X/Y direction. The stepper motors I have are unipolar and are 6V rated (I think).
I know it's possible to drive a unipolar stepper motor via a ULN2003 using an Arduino Uno. I know I can wire it using the 2-wire or 4-wire method.
But my questions are:
Is it possible to drive 2 of them? What are the modifications I will need to make to the circuit? Will this harm my Arduino? Do I need a stepper motor shield?

user2881: No problem. Just use two ULN2003 chips, one for each stepper. 
No need for a motor/stepper shield on these unipolar steppers. 
It will not harm the arduino (if wired correctly).

6298: <p>I need to use two stepper motors to move microscope positioning knobs in the X/Y direction. The stepper motors I have are unipolar and are 6V rated (I think).</p>

<p>I know it's possible to drive a unipolar stepper motor via a ULN2003 using an Arduino Uno. I know I can wire it using the 2-wire or 4-wire method.</p>

<p>But my questions are:</p>

<p>Is it possible to drive 2 of them? What are the modifications I will need to make to the circuit? Will this harm my Arduino? Do I need a stepper motor shield?</p>
 2881: <p>No problem. Just use two ULN2003 chips, one for each stepper. </p>

<p>No need for a motor/stepper shield on these unipolar steppers. </p>

<p>It will not harm the arduino (if wired correctly).</p>
