I recently bought Adafruit's motor shield v2 only to find out it can only support upto 12v.
So I'm on the look out for another shield & found this one Arduino Dual L6470 Stepper Motor Shield
I have an Arduino Mega & the documentation says it is fully compatible with the UNO.
Will there an issue using this shield with a Mega? Or if anyone else can point me at a decent stepper controller?