Hi Guys!
I would like to interface a Stepper motor using an Arduino; but before doing that I'd like to know if there would be problems if I don't have a board to eliminate galvanic currents (because some people told me that there may be some problems with those currents).
I have the Arduino board, the stepper's driver and the stepper motor, but I don't actually have that board.
If any of you had already done that interfacing without the board that remove the currents or if any of you know the answer to my question, please do not hesitate to answer.
Thanks for your attention!!! 
2nd post will be deleted if it is a duplicate.
That's not a problem. Sorry but it's the first time for me here.
Could you kindly answer my previous question?
Thanks a lot!!
Your previous question doesn't even make sense.
What do you think, a galvanic current, is ?
Are electrical currents of weak intensity, generated by the potential difference between two different materials.
I'm doing a stage in a electronical company and my Tutor told me that there could have been problems with that currents.
I asked that for that reason. Thank you for your answer.
have a look at pololu 4988 stepper motor driver
the diode protection you are looking for is to prevent back emf,
as the stepper is constructed from two (or more coils) there is a huge back surge in voltage as it is switched off
need to look at coil theory, im just mentioning the simple stuff
the diode prevents this from destroying any control electronics
i cant remember if the diode are internally configured on this device but for what its worth it works perfect first time out of the box.
see also accelstepper library for example sketches for running the motor
http://www.airspayce.com/mikem/arduino/AccelStepper/index.html
Thank you so much
marcoalberto:
Hi Guys!
I would like to interface a Stepper motor using an Arduino; but before doing that I'd like to know if there would be problems if I don't have a board to eliminate galvanic currents (because some people told me that there may be some problems with those currents).
I have the Arduino board, the stepper's driver and the stepper motor, but I don't actually have that board.
If any of you had already done that interfacing without the board that remove the currents or if any of you know the answer to my question, please do not hesitate to answer.
Thanks for your attention!!!
What could generate galvanic currents in a stepper motor and driver?? Its some
coils of wire in the motor connected to the driver circuit and nothing else...
What you need to do is decide what kind of motor, since the driver board depends
on whether you have unipolar or bipolar, high impedance or low impedance windings...