SparkFun Forums 

Where electronics enthusiasts find answers.

Have questions about a SparkFun product or board? This is the place to be.
#180334
I'm using an arduino uno, some linear stepper motors, and some easydrivers and was wondering if would it be bad to share the same I/O pin on the arduino to control the direction pins on the easydrivers. All steppers run one at a time. At this point in my project every pin counts, and I'm trying to avoid upgrading to an arduino mega.
These are the steppers I'm using https://www.sparkfun.com/products/10848
These are the drivers I'm using https://www.sparkfun.com/products/13226

Would sharing the direction pin between two easydrivers draw too much current and fry that I/O pin on my arduino uno.
If it is ok to do, would I be able to safely share 1 I/O pin for the direction of 4 drivers/steppers?

What would I look at to find this out?
On the Arduino side I’m guessing the 40mA max current per I/O pin.
On the driver side is it the logic supply current or motor supply current… or something else?

Thanks for any help.