H-bridge(with fading) 10.15

H-bridge: an integrated circuit that has many transistors inside to reverse the polarity.

int pin1 = 7;
int pin2 = 8;
void setup(){
 pinMode(pin1, OUTPUT);
 pinMode(pin2, OUTPUT);
}
void loop() {
  for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) {
    // sets the value (range from 0 to 255):
    analogWrite(pin1, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }

  // fade out from max to min in increments of 5 points:
  for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) {
    // sets the value (range from 0 to 255):
    analogWrite(pin2, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30); 
  }
  for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) {
    // sets the value (range from 0 to 255):
    analogWrite(pin2, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }

  // fade out from max to min in increments of 5 points:
  for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) {
    // sets the value (range from 0 to 255):
    analogWrite(pin1, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30); 
  }
}

int int pin1 = 7;
int pin2 = 8;
void setup(){
 pinMode(pin1, OUTPUT);
 pinMode(pin2, OUTPUT);
}
void loop() {
  digitalWrite(pin1, HIGH);
  digitalWrite(pin2, LOW);
  delay(5000);
  digitalWrite(pin1, LOW);
  digitalWrite(pin2, HIGH);
  delay(5000);
}