# 12 NEOPIXEL ring

**URL:** <https://forum.core-electronics.com.au/t/12-neopixel-ring/8674>\
**Category:** Support\
**Created:** [26 October 2020 23:16 UTC](https://forum.core-electronics.com.au/t/12-neopixel-ring/8674 "2020-10-26T23:16:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Samantha140121](https://avatars.discourse-cdn.com/v4/letter/s/9d8465/32.png) [@Samantha140121](https://forum.core-electronics.com.au/u/Samantha140121)\
**Post date:** [26 October 2020 23:16 UTC](https://forum.core-electronics.com.au/t/12-neopixel-ring/8674/1 "2020-10-26T23:16:41Z")

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Hi,  
I’m recently new to Arduino and have been playing around with the Neopixel ring (12) this one purchased from your store:

### NEOPIXEL RING - 12 X 5050 RGBW LEDS W/ INTEGRATED DRIVERS - COOL WHITE - ~6000K

I can get it to light up but for some reason when coding the colours the GREEN pixels always light up. I also find the green pixels have two lights so the whole ring doesn’t light up. However if i write number of pixels in a sketch and say 16- then does the whole ring light up.  
I hope this makes sense.

Hopefully you can help!  
Thanks

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**Author:** ![Mitchell](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/mitchell/32/3564_2.png) [@Mitchell](https://forum.core-electronics.com.au/u/Mitchell)\
**Post date:** [27 October 2020 00:01 UTC](https://forum.core-electronics.com.au/t/12-neopixel-ring/8674/2 "2020-10-27T00:01:47Z")

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Hi Samantha,

Sorry, It is a little hard to understand what you are getting at. Could you please send through a video or some images? Also if you can include some code that would be excellent! Thanks.

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<div class="post-metadata">

**Author:** ![Samantha140121](https://avatars.discourse-cdn.com/v4/letter/s/9d8465/32.png) [@Samantha140121](https://forum.core-electronics.com.au/u/Samantha140121)\
**Post date:** [28 October 2020 00:16 UTC](https://forum.core-electronics.com.au/t/12-neopixel-ring/8674/3 "2020-10-28T00:16:42Z")

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Hi Mitchell, Sure thing.  
I am just using the simple example code:

```
// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

// Which pin on the Arduino is connected to the NeoPixels?
#define PIN 2 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 12 // Popular NeoPixel ring size

// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels

void setup() {
  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
  // Any other board, you can remove this part (but no harm leaving it):
#if defined( __AVR_ATtiny85__ ) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
  // END of Trinket-specific code.

  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

void loop() {
  pixels.clear(); // Set all pixel colors to 'off'

  // The first NeoPixel in a strand is #0, second is 1, all the way up
  // to the count of pixels minus one.
  for(int i=0; i<NUMPIXELS; i++) { // For each pixel...

    // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
    // Here we're using a moderately bright green color:
    pixels.setPixelColor(i, pixels.Color(0, 150, 0));

    pixels.show(); // Send the updated pixel colors to the hardware.

    delay(DELAYVAL); // Pause before next pass through loop
  }
}

```

Some points to note :  
-I’m using it with a arduino nano  
-would it be something to do with RGB / RGBW colour?

I have attached what i hope are clear images.

Thanks Mitchell! !

 ![1st millisecond](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/2/246e7ed5a5e7195dffe57a693b7efaacee646464.jpeg) ![2nd millisecond](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/4/4a524bb9d2360ac5055281a2b693d06743ec5aae.jpeg)  
[what happens when i write NUMPIXELS 12 then loops](https://forum.core-electronics.com.au/uploads/short-url/zsszbPrYFl4zUVEQOogZ04M81DV.jpeg)

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<div class="post-metadata">

**Author:** ![Mitchell](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/mitchell/32/3564_2.png) [@Mitchell](https://forum.core-electronics.com.au/u/Mitchell)\
**Post date:** [28 October 2020 02:41 UTC](https://forum.core-electronics.com.au/t/12-neopixel-ring/8674/4 "2020-10-28T02:41:47Z")

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Hi Samantha,

Hmmmm, seems odd should be working. I found this script that is designed specifically for the neopixel ring, you will have to change the values but can you see if this works?

> **[NeoPixel Ring Bangle Bracelet](https://learn.adafruit.com/neopixel-ring-bangle-bracelet/bekathwia-arduino-code)**
>
> Build a sparkly accessory to wear to the finest party! Four NeoPixel Rings and GEMMA make a delicate 64-LED bangle bracelet to display wavy and sparkling animations.