how can I turn on LEDs,

(Sheena Variasi) #1

how can I turn on LEDs, if i want to turn on led 1 and 5 simultaneously?
some have the code?

(Marc Miller) #2

This would make them different colors, but light up at the same time.
leds[1] = CRGB(0,255,0);
leds[5] = CHSV(0,255,255);;

Or this would also work and would make them both the same color.
leds[1] = leds[5] = CRGB(0,0,255);;

The display of the pixels does not change until you call Make all your updates, and then call show to display all those updates at the same time.

(Sheena Variasi) #3

work sir, thank you.

the last question,
is there another way to blink the led besides this code?

leds[0] = CRGB(0,255,0);
leds[1] = CRGB(0,255,0);
leds[2] = CRGB(0,255,0);
leds[3] = CRGB(0,255,0);
leds[4] = CRGB(0,255,0);
leds[5] = CRGB(0,255,0);;

(Marc Miller) #4

Since you have a continuous range there [0-5], you can work that into a for loop. Have a look at the FastLED Cylon example for some ideas.

(Sheena Variasi) #5

i want the leds turn on same time but the leds has flashing effect like police light strobe.

(Michel G. Khoury) #6

What Marc meant is that you can use same code for loop than on the Cylon example. In particular this part :
for(int i = 4; i >= 0; i–) {
leds[i] = CHSV(0, 255, 255);

4 because you want 5 LEDs. And show() out of the loop because you want them all at the same time.

(Andrew Tuline) #7

Here’s a way to blink all 5 LED’s at once without any ‘delay’, ‘for’ or ‘if’ statements:

void loop () {
uint8_t j = (millis()/500) % 2; // bool works as well.
fill_solid(leds, 5, CHSV(0, 255, j*255));;
} // loop()

Your loop will run at FULL speed.

Oh, and if you want to alternate between red and blue:

fill_solid(leds, 5, CHSV(j*160, 255, 255));

(Sheena Variasi) #8

@Andrew_Tuline thanks sir, i will try this.