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//int pwm_a = 10; //PWM control for motor outputs 1 and 2 is on digital pin 10
int pwm_a = 3; //PWM control for motor outputs 1 and 2 is on digital pin 3
int pwm_b = 11; //PWM control for motor outputs 3 and 4 is on digital pin 11
int dir_a = 12; //dir control for motor outputs 1 and 2 is on digital pin 12
int dir_b = 13; //dir control for motor outputs 3 and 4 is on digital pin 13
void setup()
{
pinMode(pwm_a, OUTPUT); //Set control pins to be outputs
pinMode(pwm_b, OUTPUT);
pinMode(dir_a, OUTPUT);
pinMode(dir_b, OUTPUT);
analogWrite(pwm_a, 100);
//set both motors to run at (100/255 = 39)% duty cycle (slow)
analogWrite(pwm_b, 100);
}
void loop()
{
digitalWrite(dir_a, LOW); //Set motor direction, 1 low, 2 high
digitalWrite(dir_b, LOW); //Set motor direction, 3 high, 4 low
delay(1000);
analogWrite(pwm_a, 255);
//set both motors to run at 100% duty cycle (fast)
analogWrite(pwm_b, 255);
delay(1000);
digitalWrite(dir_a, HIGH); //Reverse motor direction, 1 high, 2 low
digitalWrite(dir_b, HIGH); //Reverse motor direction, 3 low, 4 high
delay(1000);
analogWrite(pwm_a, 100);
//set both motors to run at (100/255 = 39)% duty cycle
analogWrite(pwm_b, 100);
delay(1000);
}
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