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Arduino FastLed random behaviour

Arduino RGB led-strip turns off at full intensityCannot program ESP8266Arduino Nano - Programmer not respondingBlinking leds on different arduinosArduino keeps crashingunexpected variable behavior arduino fastLED ws2812bLED strip not workingLed Strip via USB?Arduino UNO clone not showing up in Device Manager cant see it at allControl motors with Arduino using serial connection with computer

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0

I'm trying to use FastLed on some WS2811 led strips but I get a weird behaviour. I'm using a simple code to debug the issue but still not working. Some leds are red but most are blue. I tried all the different LED strip type available in the FastLed Blink example without much difference.

#include <FastLED.h>

#define NUM_LEDS 30
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() 
 FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);


void loop() 
 for (int pos = 0; pos != NUM_LEDS; pos++) 
 leds[pos] = CRGB::Red;
 
 FastLED.show();
 delay(500);

LEDs are powered with an external 12v power supply (https://www.amazon.com/gp/product/B00D7CWSCG).

Arduino is powered with a usb cable from my PC.

I tried with a Arduino Mega and Arduino Nano no difference.

(No the correct led strip, I have a WS2811 but it's the closest I found)

Any idea what can be the issue? Thanks

arduino led

share|improve this question

edited Mar 27 at 1:16

Marchah

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the leds are powered with a external 12v power supply and the arduino with my PC (I edited my question to add those infos)
  
  – Marchah
  Mar 26 at 19:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what do you mean by both ends? do i need to close the circuit?
  
  – Marchah
  Mar 26 at 19:58
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The power supply in question doesn't matter if you don't show a schematic of how you've got things wired. Please add a schematic.
  
  – stevieb
  Mar 26 at 20:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i added a schematic to the question
  
  – Marchah
  Mar 26 at 21:49
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  have you connected the grounds of the arduino and the power supply together?
  
  – Fitzi
  Mar 26 at 21:54
  

  
  
  
  

 | 
show 3 more comments

0

I'm trying to use FastLed on some WS2811 led strips but I get a weird behaviour. I'm using a simple code to debug the issue but still not working. Some leds are red but most are blue. I tried all the different LED strip type available in the FastLed Blink example without much difference.

#include <FastLED.h>

#define NUM_LEDS 30
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() 
 FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);


void loop() 
 for (int pos = 0; pos != NUM_LEDS; pos++) 
 leds[pos] = CRGB::Red;
 
 FastLED.show();
 delay(500);

LEDs are powered with an external 12v power supply (https://www.amazon.com/gp/product/B00D7CWSCG).

Arduino is powered with a usb cable from my PC.

I tried with a Arduino Mega and Arduino Nano no difference.

(No the correct led strip, I have a WS2811 but it's the closest I found)

Any idea what can be the issue? Thanks

arduino led

share|improve this question

edited Mar 27 at 1:16

Marchah

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the leds are powered with a external 12v power supply and the arduino with my PC (I edited my question to add those infos)
  
  – Marchah
  Mar 26 at 19:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what do you mean by both ends? do i need to close the circuit?
  
  – Marchah
  Mar 26 at 19:58
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The power supply in question doesn't matter if you don't show a schematic of how you've got things wired. Please add a schematic.
  
  – stevieb
  Mar 26 at 20:30
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  i added a schematic to the question
  
  – Marchah
  Mar 26 at 21:49
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  have you connected the grounds of the arduino and the power supply together?
  
  – Fitzi
  Mar 26 at 21:54
  

  
  
  
  

 | 
show 3 more comments

I'm trying to use FastLed on some WS2811 led strips but I get a weird behaviour. I'm using a simple code to debug the issue but still not working. Some leds are red but most are blue. I tried all the different LED strip type available in the FastLed Blink example without much difference.

#include <FastLED.h>

#define NUM_LEDS 30
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() 
 FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);


void loop() 
 for (int pos = 0; pos != NUM_LEDS; pos++) 
 leds[pos] = CRGB::Red;
 
 FastLED.show();
 delay(500);

LEDs are powered with an external 12v power supply (https://www.amazon.com/gp/product/B00D7CWSCG).

Arduino is powered with a usb cable from my PC.

I tried with a Arduino Mega and Arduino Nano no difference.

(No the correct led strip, I have a WS2811 but it's the closest I found)

Any idea what can be the issue? Thanks

arduino led

share|improve this question

edited Mar 27 at 1:16

Marchah

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

#include <FastLED.h>

#define NUM_LEDS 30
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

void setup() 
 FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);


void loop() 
 for (int pos = 0; pos != NUM_LEDS; pos++) 
 leds[pos] = CRGB::Red;
 
 FastLED.show();
 delay(500);

share|improve this question

edited Mar 27 at 1:16

Marchah

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

share|improve this question

edited Mar 27 at 1:16

Marchah

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges

asked Mar 26 at 19:31

MarchahMarchah

751212 bronze badges