dcmotorSpeedControlWinHtut

dcspeed.ino

const int IN1 = 7;
const int IN2 = 6;
const int ENA = 9;
const int ENB = 3;


void setup() {

  pinMode (IN1, OUTPUT);
  pinMode (IN2, OUTPUT);
  pinMode (ENA, OUTPUT);
  pinMode (ENB, OUTPUT);
  Serial.begin(9600);
  Serial.println("Press F for fast speed");
  Serial.println("Press M for Normal speed");
  Serial.println("Press S for Slow speed");
  Serial.println("Press x for Stop Motor");

}

void loop() {
 
if(Serial.available()){
  
  int data=Serial.read();

  switch(data){
    case 102:
    fast();
    break;

    case 109:
    medium();
    break;

    case 115:
    slow();
    break;  

    case 120:
    xstop();
    break;
    
    }
  
  } 
}


void fast(){
  
  
  analogWrite(ENA, 255);
  analogWrite(ENB, 255); 
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(3000);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  delay(3000);
  
  
  }
 void medium(){
  
  
  analogWrite(ENA, 125);
  analogWrite(ENB, 125); 
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(3000);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  delay(3000);
  
  }
 void slow(){
  
   analogWrite(ENA, 40);
  analogWrite(ENB, 40); 
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(3000);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  delay(3000);
  
  
  }
void xstop(){
  
  
  analogWrite(ENA, 40);
  analogWrite(ENB, 40); 
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  delay(3000);
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  delay(3000);
  
  
  }