I need to construct 4 reactors for an experiment requiring mixing. We want to automate the mixing and at the same time reduce cost. can we connect multiple stepper motors with 5 or 6 wires on one shield version 2?
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Depending on the shield you can connect an external powersource through mosfets or transistors (Depending on the size of the steppermotor).
But if it is smaller motors with a 12v powersource, i really don't se why you would do that, since stepper motor controllers cost about $2-$4 each. Being cost effective i think that writing this question would cost more than actually just go and buy 6-8 controllers. (Don't buy the shield ones, they are overly expensive)