I have searched everywhere and have not found a good answer on the forums. I feel like I am doing the same thing over and over again.


I have a 4-phase stepper motor (https://www.oyostepper.com/category-...per-Motor.html) on my telescope mount, but I do not have a control machine and the drivers are no longer available. I would like to control the stepper motor using an Uno and a motor shield if needed. I think I understand the logic of needing to pass the switching sequence to the windings, and I think I can handle it in code.


I do not understand what electronics (if any) need to be connected between the Uno or Shield and the stepper motor inputs. Can I just connect the base of the transistor directly to the digital output pin? Or would the voltage be too high? Do I really need a Motor Shield?