Ping-Pong with a DC motor & a pot

Using Arduino Programming Questions
11

PaulS:
You never actually do anything with dir or motors...

If the potentiometer values represent limits, names like MIN_something and MAX_something make more sense than two MAX_somethings.

Yes I was just testing to make sure I got the logic correct before connecting to the motor. Here it is with the motor code. Thanks for the tip on the MIN/MAX..

#define  POT_PIN   A8
#define  MAX_LEFT  750
#define  MIN_RIGHT 300

//Motor A 
int dir1PinA = 32;
int dir2PinA = 34; 
int speedPinA = 36;
int motor_speed = 250; 
int dir = 0; // 0 = Left, 1 = Right

void setup() {
  Serial.begin(9600);  
}

void loop() { 
  
  int headRot = analogRead(POT_PIN);
 // Serial.println(headRot); // read-print pot
  analogWrite (speedPinA, motor_speed); //Turn motor on
  
  if (headRot < MAX_LEFT)
  {
    if (headRot > MIN_RIGHT)
    {
     // Serial.println("Center");
    } else {
    //  Serial.println("Min Right");
      dir = 0;
    }
  } else {
   // Serial.println("Max Left"); 
    dir = 1;
  }
  
  flipMotorDirection(dir);  
}


void flipMotorDirection(int dir)
{
  if (0 == dir) 
  {
    digitalWrite (dir1PinA , LOW); 
    digitalWrite (dir2PinA, HIGH); 
  } 
  else 
  {
    digitalWrite (dir1PinA, HIGH); 
    digitalWrite (dir2PinA, LOW); 
  } 
}