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Neopixel Strip DOA
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Neopixel Strip DOA

by tracy0 on Fri Feb 02, 2018 1:14 pm

I got a Adafruit NeoPixel Digital RGBW LED Strip - Black PCB 30 LED/m about 3 weeks ago. I am using it with a Trinket 5v. The neopixel strip never worked. I followed your Neopixel Uberguide and nothing seems to work. I have also checked that all the wiring is correct and it seems so. I am guessing the strip is broken. Any ideas? Here are some pictures (sorry if they are blurry) and the code I am using:
Code: Select all | TOGGLE FULL SIZE
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN 1

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(30, PIN, NEO_RGBW + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.

void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code


  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  // Some example procedures showing how to display to the pixels:
  colorWipe(strip.Color(255, 0, 0), 50); // Red
  colorWipe(strip.Color(0, 255, 0), 50); // Green
  colorWipe(strip.Color(0, 0, 255), 50); // Blue
//colorWipe(strip.Color(0, 0, 0, 255), 50); // White RGBW
  // Send a theater pixel chase in...
  theaterChase(strip.Color(127, 127, 127), 50); // White
  theaterChase(strip.Color(127, 0, 0), 50); // Red
  theaterChase(strip.Color(0, 0, 127), 50); // Blue

  rainbow(20);
  rainbowCycle(20);
  theaterChaseRainbow(50);
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c);    //turn every third pixel on
      }
      strip.show();

      delay(wait);

      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}

//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
      }
      strip.show();

      delay(wait);

      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
Attachments
WIN_20180202_12_00_17_Pro.jpg
WIN_20180202_12_00_17_Pro.jpg (57.85 KiB) Viewed 377 times
WIN_20180202_11_52_40_Pro.jpg
WIN_20180202_11_52_40_Pro.jpg (86.26 KiB) Viewed 377 times

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Re: Neopixel Strip DOA

by adafruit_support_carter on Mon Feb 05, 2018 2:26 pm

What are you using for a power supply into the NeoPixel strip? Also, I can't fully see how the wires go from the Trinket to the strip. Can you post another photo of that.

adafruit_support_carter
 
Posts: 5628
Joined: Tue Nov 29, 2016 2:45 pm

Re: Neopixel Strip DOA

by tracy0 on Mon Feb 05, 2018 5:38 pm

Sure. I am using a 5v 2amp power supply. Here are the additional pictures:
Attachments
WIN_20180205_16_37_14_Pro.jpg
WIN_20180205_16_37_14_Pro.jpg (90.17 KiB) Viewed 332 times
WIN_20180205_16_30_24_Pro.jpg
WIN_20180205_16_30_24_Pro.jpg (61.96 KiB) Viewed 332 times
WIN_20180205_16_31_49_Pro.jpg
WIN_20180205_16_31_49_Pro.jpg (64.75 KiB) Viewed 332 times

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Re: Neopixel Strip DOA

by adafruit_support_carter on Mon Feb 05, 2018 7:49 pm

That all seems fine. Do you have a multimeter? If so, measure the voltage on the screw terminals of the barrel adapter for your power input. Let's make sure there's 5V there.

adafruit_support_carter
 
Posts: 5628
Joined: Tue Nov 29, 2016 2:45 pm

Re: Neopixel Strip DOA

by tracy0 on Mon Feb 05, 2018 8:15 pm

The multimeter says 5.25 volts. By the way, thanks for the quick reply.
Attachments
WIN_20180205_19_13_24_Pro.jpg
WIN_20180205_19_13_24_Pro.jpg (54.66 KiB) Viewed 323 times

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Re: Neopixel Strip DOA

by adafruit_support_carter on Mon Feb 05, 2018 9:37 pm

Hmmm. Do we know the Trinket is OK? Does it seem like everything is uploading to it fine? If you upload the basic blink test (for the onboard LED) does it work?

adafruit_support_carter
 
Posts: 5628
Joined: Tue Nov 29, 2016 2:45 pm

Re: Neopixel Strip DOA

by tracy0 on Mon Feb 05, 2018 11:04 pm

Yes, I tried the blink test with a yellow LED via pin 1 and it worked.

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Re: Neopixel Strip DOA

by adafruit_support_carter on Tue Feb 06, 2018 1:52 pm

This looks correct, but it's a little out of focus. Is the arrow on the strip pointing like this?
arrow.jpg
arrow.jpg (33.5 KiB) Viewed 257 times

adafruit_support_carter
 
Posts: 5628
Joined: Tue Nov 29, 2016 2:45 pm

Re: Neopixel Strip DOA

by tracy0 on Tue Feb 06, 2018 10:12 pm

Yes it is.

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Re: Neopixel Strip DOA

by adafruit_support_carter on Wed Feb 07, 2018 12:44 pm

Let's replace it. Send an email to support@adafruit.com with a link to this thread and your order number and they can get you a replacement NeoPixel Digital RGBW LED Strip - Black PCB 30 LED/m.

adafruit_support_carter
 
Posts: 5628
Joined: Tue Nov 29, 2016 2:45 pm

Re: Neopixel Strip DOA

by tracy0 on Wed Feb 07, 2018 5:04 pm

Thanks so much for the help!!!

tracy0
 
Posts: 10
Joined: Mon Jan 01, 2018 8:55 pm

Please be positive and constructive with your questions and comments.