This script operates 2 stepper motors using 2 potentiometers.  playing with the values allows you to calibrate the sensitivity of the motors. #include <Stepper.h> #define STEPS 100 // no. of steps on motor Stepper stepper(STEPS, 8, 9, 10, 11); // stepper, number of steps, pins Stepper stepper1(STEPS, 4, 5, 6, 7); int potval0 = 0; //incoming potentiometer values int potval1 = 1; int previous = 0; int previous1 = 0; int potmin = 1023;// pot minimum and maximum for re-mapping the values int potmax = 0; void setup() { // set the speed of the motor (RPMs) stepper.setSpeed(50); stepper1.setSpeed(50); } void loop() { // get the sensor value potval0 = analogRead(0); potval0 = map(potval0, potmin, potmax, 0, 100);//re-map sensor value to no. of steps potval1 = analogRead(1); potval1 = map(potval1, potmin, potmax, 0, 100); int val = potval0; int val1 = potval1; stepper.step(val – previous); //number of steps sent to sensor stepper1.step(val1 – previous1); // remember the previous value of the sensor previous = val; previous1 = val1; }