Question

How to control the speed of a dc motor using closed loop with arduino?

Answer 1

const int pwm = 2 ; //initializing pin 2 as pwmconst int in_1 = 8 ;const int in_2 = 9 ;//For providing logic to L298 IC to choose the direction of the DC motor void setup() {   pinMode(pwm,OUTPUT) ; //we have to set PWM pin as output   pinMode(in_1,OUTPUT) ; //Logic pins are also set as output   pinMode(in_2,OUTPUT) ;} void loop() {   //For Clock wise motion , in_1 = High , in_2 = Low   digitalWrite(in_1,HIGH) ;   digitalWrite(in_2,LOW) ;   analogWrite(pwm,255) ;   /* setting pwm of the motor to 255 we can change the speed of rotation   by changing pwm input but we are only using arduino so we are using highest   value to driver the motor */   //Clockwise for 3 secs   delay(3000) ;   //For brake   digitalWrite(in_1,HIGH) ;   digitalWrite(in_2,HIGH) ;   delay(1000) ;   //For Anti Clock-wise motion - IN_1 = LOW , IN_2 = HIGH   digitalWrite(in_1,LOW) ;   digitalWrite(in_2,HIGH) ;   delay(3000) ;   //For brake   digitalWrite(in_1,HIGH) ;   digitalWrite(in_2,HIGH) ;   delay(1000) ;}