NeoPixel Ring-12x5050-Raspberry pi 3

[Hayden_P]

I have recently purchased a NeoPixel Ring - 12 x 5050 RGB LED from amazon.

I have also followed the link https://cdn-learn.adafruit.com/download ... rry-pi.pdf
to install NeoPixel Library.

So, I can turn the LEDS, but they are not acting as desired, for instance, colors are randomly changing/blinking.

So, for the test, I want to turn all the LEDs on and be colored red:

Code: Select all

import time
import board
import neopixel

pixel_pin = board.D18
num_pix = 12
order = neopixel.GRBW # won't matter if I use orders, RGB, RGBW, GRB

pixel = neopixel.NeoPixel(pixel_pin, num_pix, brightness = 0.2, auto_write = False, pixel_order = order)

while True:
	pixel.fill((255,0,0))
	pixel.show()

this turn some led with different colors and blinking!

IMG_4981.jpg (33.28 KiB) Viewed 92 times

Here is how I connected to my raspberry pi 3 b+ running buster OS.

IMG_4984.jpg (35.53 KiB) Viewed 92 times

IMG_4985.jpg (41.08 KiB) Viewed 92 times

So if I use the following code, I'm assuming I should get all lights as red, but nothing turns on, and if I put it back under while loop it just blinks for the first few led.

Code: Select all

import time
import board
import neopixel

pixel_pin = board.D18
num_pix = 12
order = neopixel.GRBW # won't matter if I use orders, RGB, RGBW, GRB

pixel = neopixel.NeoPixel(pixel_pin, num_pix, brightness = 0.2, auto_write = False, pixel_order = order)

pixel.fill((255,0,0))
pixel.show()
time.sleep(50)

what am I missing, why, few of LED gets change colors, blinking and etc.
This is a frustrating situation, which I spent time to figure it out, and nothing!

[adafruit_support_carter]

Are the wire connections to the ring itself soldered?

ring.jpg (15.35 KiB) Viewed 83 times

[Hayden_P]

No they are not, is that make it difference?!

[adafruit_support_carter]

Yes. The wires will need to be soldered to the ring to make a good electrical connection.

[Hayden_P]

I have soldered the wires to the ring, and nothing has changed! I even ordered another ring and the same!

[adafruit_support_carter]

Please post a photo of the soldering.

[Hayden_P]

Here are the pics:

sold_2.jpg (41.64 KiB) Viewed 61 times

sold_1.jpg (27.52 KiB) Viewed 61 times

[adafruit_support_carter]

Thanks. Photo is little too low res to make OK soldering well enough to see if it looks good:

soldering.jpg (30.64 KiB) Viewed 60 times

Can you post another showing those solder connections better.

And "no change" means the NeoPixel ring still looks like this after running the code in the first post?

pixels.jpg (11.5 KiB) Viewed 60 times

[Hayden_P]

yes, the LED flickering weirdly

Screen Shot 2023-02-08 at 1.20.55 PM.png (573.39 KiB) Viewed 58 times

[adafruit_support_carter]

Is the total number of LEDs that flicker the same? And it's always the same number when you run the code?

Soldering looks generally. Maybe a little thin on the GND pad? See here for a general ref:
https://learn.adafruit.com/adafruit-gui ... n-problems

In general, what's being described sounds like a connection issue.