Sparkfun electronics sells a stepper motor driver with only two inputs: to me that looks like a very comfortable part, as all the complexity is in software please see "http://www.sparkfun.com/commerce/product_info.php?products_id=8368" and http://greta.dhs.org/EasyDriver/ for details.Now I dont know at all, how to hook that up to an arduino:- does the arduino have to supply the power?- otherwise, how would both have a common ground?- which arduino ports to wire to the easy driver STEP/DIR pins (digital out)?Thank you.Peter
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