New to Stepper Motor

Forum 2005-2010 (read only) General Bar Sport
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Hi, I am very new to Arduino.

I just purchase a stepper motor (http://www.robotshop.com/PDF/rb-soy-07-unipolar-stepper-motor-specs.pdf or http://www.robotshop.com/rbsoy07-soyo-unipolar-stepper-motor.html) and Easy Driver V4.2 to make an exactly same stuff what this person made (Dan Thompson: EasyDriver 4.2 Tutorial).

Question 1:
Please let me know which wire color (B, Y, G, R, W, and B) goes to A,B,C, and D in the first picture of this (http://4.bp.blogspot.com/_POxG6aoXG3o/TAsyGBniZBI/AAAAAAAABLQ/X6nFqJ1TOAg/s1600/ED4_revised.jpg) and which two wires are not connected to anything in the blog.

Question 2:
The motor works with 12V which is different from Easy Driver voltage 5V. Do I need to put anything to control (decrease) the voltage? Also, this is unipolar. I found that some tutorials for the Easy Driver recommend using Bipolar. Can I still use my motor?

Question 3:
Please let me know anything I should keep in mind not to burn Arduino, Easy Driver, and a motor.

Any advice and answer is very appreciated.

D

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You seem to say you have a bipolar stepping motor and a unipolar driver. You can't use a unipolar driver to drive a bipolar motor.

See:-

http://www.thebox.myzen.co.uk/Workshop/Motors_3.html
and

http://www.thebox.myzen.co.uk/Workshop/Motors_4.html

If you have a unipolar motor you can use two bipolar drivers to drive it ( that's 4 H-bridges in all).

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