Need Help how to control 4 dc motors with 2 potentiometers atAdafruitMotorShield

Projects Programming
4

It looks like you were very close with the firs program you posted. Here it is in code tags and without the commented lines which only serve to confuse. I have also reformatted it to make it easier to read.

#include <AFMotor.h>

int potentiometerPin = 7; // analog pin used to connect the potentiometer
int potentiometerValue; // variable to read the value from the analog pin 


AF_DCMotor left1stMotor(1); // 1. motor ( Left back motor )

int i;

void setup() 
{ 
  Serial.begin(9600); // set up Serial library at 9600 bps
  left1stMotor.setSpeed(200);
  left1stMotor.run(RELEASE);
} 

void loop() 
{ 
  potentiometerValue = analogRead(potentiometerPin); // reads the value of the potentiometer (value between 0 and 1023) 
  potentiometerValue = map(potentiometerValue, 0, 1023, 0, 255);  //use this line or the next line but not both 
  potentiometerValue = potentiometerValue/4;

  Serial.print("tick");
  left1stMotor.run(FORWARD);

  for (i=0; i<255; i++) 
  {
    if(potentiometerValue <= 127)
    {
      left1stMotor.setSpeed(i);
      delay(10);
    }
  }
  Serial.print("tock");
  left1stMotor.run(BACKWARD);

  for (i=0; i<255; i++) 
  {
    if(potentiometerValue >= 127)
    {
      left1stMotor.setSpeed(i);
      delay(10);
    }
  }

  Serial.print("tech");
  left1stMotor.run(RELEASE);
  delay(1000);
}

Note my comment about using one line or the other but not both. The first line maps the 0 to 1023 value to 0 to 255 then the second line divides the answer by 4. Will the result ever be greater than 127 ?

What does the 1 in this line do ?
AF_DCMotor left1stMotor(1);Does it mean that you are using digital pin 1 ? If so then it will conflict with Serial.print() and vice versa.