#define MOTOR_DIR3 #define MOTOR_PWM11 void setup() { pinMode(MOTOR_DIR,OUTPUT); pinMode(MOTOR_PWM,OUTPUT); }

void loop() { for(int speed=0;speed<=255;speed++){ digitalWrite(MOTOR_DIR,LOW); analogWrite(MOTOR_PWM,speed); delay(20); } delay(500); for(int speed=255;speed>=0;speed--){ digitalWrite(MOTOR_DIR,LOW); analogWrite(MOTOR_PWM,speed); delay(20); } delay(500); }