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Common Cathode or anode dir/step signal

Posted: Mon Sep 23, 2013 12:52 am
by clamothe
All,

I have a unipolar stepper driver that I'd like to connect to a USBCNC controller.

I believe the step / direction inputs to the unipolar driver use a common ground (common anode?). The USB CNC has a common 5V (common cathode) system. It that the purpose of the pullup disables?

Can you guide me to the orret wiring?