# Led oscillate

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?

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?

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?