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/
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)?
that looks like an awesome board, and i was planning on building one just like it! I guess now I'm going to have to check it out. I cant answer all your questions, but I can answer some of them.
you wire the step/dir pins to the digital out pins. it *doesnt* need PWM, so i would recommend using a plain pin, and save your PWM pins for something you might want to use PWM on.
i'd also like to know the answers to the first two questions, as i'm dealing with the same question right now.