enquiry on ws2812 arduino

Using Arduino LEDs and Multiplexing
#1

Hi all,

just wanted to check as i wanted to light up my ws2812 with 120 led, but the led after light up 1 round with purple and end up it auto restart arduino uno, is there anyone can guide me what should i change in the code? the led i wanted to do is just wanted to light up 3 round of 3 different color one by one led. is there possible, here is my code.

#include "FastLED.h"

// Number of leds in 1 strip
#define NUM_LEDS 120

unsigned long previousMillis = 0;        // will store last time LED was updated
uint8_t i = 0;

// constants won't change :
const long interval = 500;           // interval at which to blink (milliseconds)

DEFINE_GRADIENT_PALETTE( Sunrise_gp )
{
 0,  19,  2, 39,
  51,  0,  0, 51,  // Midnight blue
  94,   1, 29, 18,  // Deepsky blue
  149, 113, 78,188,  // Medium blue
  201, 25, 150, 205};  // Lightsky blue


CRGBPalette16 myPal = Sunrise_gp;

// Define the array of leds
CRGB ledstrip_1[NUM_LEDS];
CRGB ledstrip_2[NUM_LEDS];
CRGB ledstrip_3[NUM_LEDS];
CRGB ledstrip_4[NUM_LEDS];

void setup()
{
  FastLED.addLeds<WS2812B, 4, GRB>(ledstrip_1, NUM_LEDS);
  FastLED.addLeds<WS2812B, 5, GRB>(ledstrip_2, NUM_LEDS);
  FastLED.addLeds<WS2812B, 6, GRB>(ledstrip_3, NUM_LEDS);
  FastLED.addLeds<WS2812B, 7, GRB>(ledstrip_4, NUM_LEDS);
}

void loop()
{
  sunrise();

  FastLED.show();
}

void sunrise() {

  // total sunrise length, in minutes
  static const uint8_t sunriseLength = 3;

  // how often (in seconds) should the heat color increase?
  // for the default of 60 minutes, this should be about every 14 seconds
  // 14 seconds x 256 gradient steps = 3,584 seconds = ~60 minutes
  static const float interval = ((float)(sunriseLength * 60) / 256) * 1000;

  // current gradient palette color index
  static uint8_t heatIndex = 0; // start out at 0


  // current used color palette
  CRGB color = ColorFromPalette(myPal, heatIndex);

  // fill the entire strip with the current color palette starting on 1 side
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;
    ledstrip_1[i] = CRGB(color);
    ledstrip_2[i] = CRGB(color);
    ledstrip_3[i] = CRGB(color);
    ledstrip_4[i] = CRGB(color);


    // slowly increase the heat
    EVERY_N_MILLISECONDS(interval ) {
      // stop incrementing at 255, we don't want to overflow back to 0
      if (heatIndex < 255) {
        heatIndex++;
      }
    }

    i = (i + 1) % NUM_LEDS;
  }

}

I have solve just the current not enough

#2

4 stripes, each 120 LEDS..
Low on memory warning ?
Try with one stripe..

#3

Did you see the last line of that first post?

I have solve just the current not enough

#4