Led oscillate

Other Hardware LEDs and Multiplexing
1

i am learning
i am trying to figure out how to make 2 LEDs fade but out of phase

here is my fail attempt

/*
*Double fade
*
*
*This sketch is an experement to make two leds fade on and off
*in opposite time to eachother.
*/

int led1 = 6; // the pin that the LED is attached to
int led2 = 5;
int brightness = 0; // how bright the LED is
int fadeAmount = 5; // how many points to fade the LED by

// the setup routine runs once when you press reset:
void setup() {
// declare pin 9 to be an output:
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
// set the brightness of pin 9:
analogWrite(led1, brightness);
delay(15);
analogWrite(led2, brightness);

// change the brightness for next time through the loop:
brightness = brightness + fadeAmount;

// reverse the direction of the fading at the ends of the fade:
if (brightness == 0 || brightness == 255) {
fadeAmount = -fadeAmount ;
}
// wait for 30 milliseconds to see the dimming effect
delay(30);
}

furthermore, i would like to learn from some lessons, but i cant seem to find anything that goes too deep. any advice?

2

You are using the same 'brightness' for both PWM signals.
Try brightness, brightness1
One goes 0 to 255, the other goes 255 to 0, then they change directions.

You could also try brightness and (255 - brightness):
0, 5, 10, 15, 20 ... 240, 245, 250, 255
255, 250, 245, 240, 235.. 15, 10, 5, 0

You've also got some pin9 comments in, left over from something else?

3

chutch:

  // set the brightness of pin 9:

analogWrite(led1, brightness); 
  delay(15);
  analogWrite(led2, brightness);

You're setting both LEDs to the same brightness.

chutch:
furthermore, i would like to learn from some lessons, but i cant seem to find anything that goes too deep. any advice?

Lessons for what?