Led strip doesn't work

Using Arduino Project Guidance
1

Hey guys,

just a short question.
I have an led strip with 300 leds, all of them need 0.6 ma, so i have a 100W traffo connected to it (5v 20amps).

Parts:
strip: http://www.amazon.de/gp/product/B00XKXUIG?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
traffo: http://www.amazon.de/gp/product/B00RMWZ2IO?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

my problem is that when i connect the strip to the power supply, the first leds lights up nothing else and if i connect then my arduino uno to it and run this code( which should leed to let a light wander up and down the strip the whole strip just starts falshing in different colors.

#include "FastLED.h"

#define NUM_LEDS 1
#define DATA_PIN 3
#define CLOCK_PIN 13

CRGB leds[NUM_LEDS];

void setup() { 
      FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
}

void loop() { 
  // Turn the LED on, then pause
  leds[0] = CRGB::Red;
  FastLED.show();
  delay(500);
  // Now turn the LED off, then pause
  leds[0] = CRGB::Black;
  FastLED.show();
  delay(500);
}

So my question : Is my strip broken ? :frowning:

2

Hi,
The first link doesn't work, the second one does.

Tom...... :slight_smile:

3

The code you posted only blinks the first led of a 1 led-string (red/black).

#define NUM_LEDS 1
....
  leds[0] = CRGB::Red;
4

Whandall:
The code you posted only blinks the first led of a 1 led-string (red/black).

#define NUM_LEDS 1

....
  leds[0] = CRGB::White;

sorry im an idiot i ment this sketch

#include "FastLED.h"

#define NUM_LEDS 300
#define DATA_PIN 6
#define CLOCK_PIN 13

CRGB leds[NUM_LEDS];

void setup() { 
      FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
}

void loop() { 


  for(int i = 0; i < NUM_LEDS; i++)
  {
    
    leds[i] = CRGB::White;
    FastLED.show();
    delay(500);
    leds[i] = CRGB::Black;
    delay(500);
  }
  
  for(int i = NUM_LEDS; i > 0 ; i++)
  {
    leds[i] = CRGB::White;
    FastLED.show();
    delay(500);
    leds[i] = CRGB::Black;
    delay(500);
  }
  
}

And tomgeorge sry this is the right link: http://www.amazon.de/gp/product/B00XKXUIG0?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00

5

The white led is sometimes at the right place but in addition to it some leds in the strip are flashing in various colors...

6

There is no led set to white in your sketch, back does not work.

I tried this (with 60 leds) and it sends a single green led much faster back and forth.

#include "FastLED.h"
#define NUM_LEDS 300
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
}
void loop() {
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(50);
    leds[i] = CRGB::Black;
  }
  for (int i = NUM_LEDS; i > 0 ; i--)
  {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(50);
    leds[i] = CRGB::Black;
  }
}
7

Whandall:
There is no led set to white in your sketch, back does not work.

I tried this (with 60 leds) and it sends a single green led much faster back and forth.

#include "FastLED.h"

#define NUM_LEDS 300
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS);
}
void loop() {
  for (int i = 0; i < NUM_LEDS; i++)
  {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(50);
    leds[i] = CRGB::Black;
  }
  for (int i = NUM_LEDS; i > 0 ; i--)
  {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(50);
    leds[i] = CRGB::Black;
  }
}

yeah i know i changed it in my posting after a few secs but you where too fast... ._. but at my strip my whole led strip i flashing in different colors if there were 1 led wander up and down i would be happy ... but like i said the whole strip is flashing ... :frowning: (ps i think your strip is flashing green because you have GRB or GBR as led setup...

8

I know. its GRB what works with my ws2812.

You connected both GNDs, didn't you?

9

no should i ? :o

10

Definitely.

Probably this is your problem.

11

Wandall you are my hero thank you !!!!! and don't know how you knew it but thanks ! :smiley:

12

So I wish you much fun and a bright time with your strip. :wink: