ColorWipe for LPD8806

[Jasonmorris]

We would very much like the LPD8806 and the breadboard to be synchronized.

But we are not sure how to do it. If you could point us in the right direction we will be very happy.

[adafruit_support_bill]

We would very much like the LPD8806 and the breadboard to be synchronized.

So, you need to identify at what points in the LPD8806 sequence your traffic lights need to change, and break the code for that sequence up into parts. Then you insert code for the traffic light changes between the parts:

led-sequence part 1
traffic light change 1
led-sequence part 2
traffic light change 2
led-sequence part 3
traffic light change 3
etc...

[adafruit_support_rick]

If I'm following this correctly, adafruit_support's suggestion might not work the way you want, since you are using delays to control how long each traffic light is lit. If you follow the suggestion, then you will have those delays in between your led color wipe sequences.

A better way to look at it might be like this:
ColorWipe2 takes an argument, 'wait', that controls how fast you sweep through the LPD8806. Looks like you are passing it a value of 500ms.

So, your loop updates a couple of LEDs, then waits for 500ms, then updates the next LEDs, then waits again, right?

That means that you can think of your loop-counter as a time value:
i = 0 is 0ms
i = 1 is 500ms
i = 2 is 1000ms
etc.

So, instead of turning your traffic lights on and off in a separate block of code, you can turn them on and off right inside of your loop. Something like this:

Code: Select all

for (i=strip.numPixels()/2; i >= 0; i-=2) {
strip.setPixelColor(i, c2); // grøn
strip.setPixelColor(i + 1, c2); // grøn
strip.setPixelColor(i + strip.numPixels()/2, c1); //rød
strip.setPixelColor(i + (1) + strip.numPixels()/2, c1);  // rød
strip.show();
if (i == 0) {
  digitalWrite(gul, HIGH);
}
if (i == 2) {
  digitalWrite(gul, LOW);
  digitalWrite(rod, HIGH);
}
if (i == 16) {
  digitalWrite(rod, LOW);
}
delay(wait);
}