How to control DC motor direction and speed

 

    Circuit Diagram 

           

 CODE

 #include <LiquidCrystal.h>

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

#define potentiometer  A0  //10k Variable Resistor

#define bt_F A1 // Clockwise Button

#define bt_S A2 // Stop Button

#define bt_B A3 // Anticlockwise Button

#define M1_Ena 11 // Enable1 L298 for PWM

#define M1_in1 10 // In1  L298 for Clockwise

#define M1_in2 9  // In2  L298 for Anticlockwise

int read_ADC =0;

int duty_cycle;

int duty_cycle_lcd;

int set = 0;

void setup(){

Serial.begin(9600);// initialize serial communication at 9600 bits per second:

pinMode(potentiometer, INPUT);

pinMode(bt_F, INPUT_PULLUP);

pinMode(bt_S, INPUT_PULLUP);

pinMode(bt_B, INPUT_PULLUP);

pinMode(M1_Ena, OUTPUT);

pinMode(M1_in1, OUTPUT);

pinMode(M1_in2, OUTPUT);

lcd.begin(16,2);  

lcd.setCursor(0,0);

lcd.print(" WELCOME To  My ");

lcd.setCursor(0,1);

lcd.print("YouTube  Channel");

delay(2000); // Waiting for a while

lcd.clear();

}

void loop(){ 

read_ADC = analogRead(potentiometer);

duty_cycle = map(read_ADC, 0, 1023, 0, 255);  

duty_cycle_lcd = map(read_ADC, 0, 1023, 0, 100); 

analogWrite(M1_Ena, duty_cycle);

lcd.setCursor(0,0);

lcd.print("Duty Cycle: ");

lcd.print(duty_cycle_lcd); 

lcd.print("%  ");

if(digitalRead (bt_F) == 0){set = 1;}

if(digitalRead (bt_S) == 0){set = 0;}

if(digitalRead (bt_B) == 0){set = 2;}

lcd.setCursor(0,1);

if(set==0){ lcd.print("      Stop      ");

digitalWrite(M1_in1, LOW);  

digitalWrite(M1_in2, LOW);

}

if(set==1){ lcd.print("    Clockwise   ");

digitalWrite(M1_in1, HIGH);  

digitalWrite(M1_in2, LOW);

}

if(set==2){ lcd.print(" Anticlockwise  ");

digitalWrite(M1_in1, LOW);  

digitalWrite(M1_in2, HIGH);

}

delay(50); 

}