WS2812B not working

Using Arduino LEDs and Multiplexing
1

Hi all!

Today i bought a WS2812B Led strip. I wrote a simple code to lit all LED's blue.
And that's happening:

Video From LED working

#include <FastLED.h>
#define LED_PIN 10              
#define NUM_LEDS 30
#define COLOR_ORDER RGB
#define LED_TYPE WS2812B     

#define MAX_BRIGHTNESS 150      // Thats full on, watch the power! 164
#define MIN_BRIGHTNESS 20       // set to a minimum of 25% 32

struct CRGB leds[NUM_LEDS];

void setup() {
  LEDS.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(140);
  }


void loop() {
  for(int i = 0; i < 30; i++) {
    leds[i] = CHSV(200, 255, 255);
    FastLED.show();
    delay(100);  
  }
  
}
2

There is a ground wire missing. :astonished:

3

Sorry, i forgot the details:

noiasca:
1 What should it do?
2 What does it?
3 Describe your problem.
4 Ask a question. Questions end with questionmarks.
5 Show a schematic.
6 Where does the power for the Uno comes from?
7 Where does the power for the stripe comes from?
8 How much Ampere can your power source(s) provide?
9 Which tutorial are you following? Provide a Link.
10 Is there a resistor in your data line? If not, why not?
11 Is there a ground connection between the stripe and the Uno?

So now i just want to light all LED in blue color. The program begins, the LED strip begins to fill with this color, but there suddenly begin mistake. Random LED begin blink, change color, ect. In the code are only the Blue color, but random led cange another color, blink, fade, ect.

The UNO get power from PC USB.
The stripe get power from a lipo, trough an 5V 5A UBEC. The strip has 3 pinout: +5V, GND, SIGNAL.
+5V and the GND come from UBEC, SIGNAL come from Arduino PIN 10.

There is no resistor between arduino and the LED strip... But i think its just becouse the noize...

There is no common GND between arduino and the led strip, but its working without, not? (before it i wrote a code, where i can change the color of all LED from remote, and its working without a connected common GND between the ardu and strip.) just got the same error like here.

4

There is no resistor between arduino and the LED strip.

Then put one in, and add a 1000uF capacitor across the strip.

There is no common GND between arduino and the led strip, but its working without, not?

No it is not working that is why you are seeing the problem.
And asking the question.

No matter what you think these two things matter and matter a lot.

5

Okey, thank you! I will add a common GND to them.