About the electrical noise, i am trying to connect a potentiometer to a stepper motor, (keep in mind that if i have problem with the electrical noise, i will abandon this ideea for the moment), but the catch is that the potentiometer is from a car gas pedal. No your tone does not sound rude, i am aware that all of you are trying to help me, and i am very thankful for that, despite the lack of information i am providing. The main idea of what i am trying to accomplish is a sequential gearbox changer. sort of. the two motors control the translation and rotation of a gear shifter. the hall sensors gives me the speed of the wheel and the rot/min of the engine. the second stepper is an idea to change the wire throttle to a electric/stepper throttle. on second thoughts, this stepper might as well have its own independent small arduino board, because i don't need any data for the other boards from it. I will try in the next month to advance with this, but i am still waiting for some mechanical parts. Hopefully i will manage to post some pictures of it, to give a better idea of everything.