Rroofl electronics suggestion
Suggested Electronics
Rroofl will work just fine with a RAMPS or Melzi electronics setup. If you're building your own with an Arduino Mega, it probably pays to see how the RAMPS board is wired up and to emulate this when wiring your Arduino and stepper boards together. It may be easier to look in the pins configuration file for your firmware - typically config.h or pins.h - where the3 pin numbers your firmware expects to find steppers and thermistors etc. will be nicely laid out for you.
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