Adafruit NeoPixel Ring 12 x 5050

[dexyoji]

So i’m very VERY new to this. I’m trying to use two of the NeoPiexl rings and have a schematic of the circuit. However, these run on 5v. I was planning on using a 12v with a resistor but i’m not even sure where to start with that. i know it would need around 55.55565 but i don’t know which to use or how to connect it. Help?

[dastels]

Don't do that. That can work if the current load is static (meaning that a fixed voltage will be across the resistor). The current required by the neopixel rings depend on how they are used (how many are lit, with what color). Instead, either use a 5v power source, or a 5v regulator like https://www.adafruit.com/product/4739.

Dave

[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 57 times

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

IMG_4984.jpg (35.53 KiB) Viewed 57 times

IMG_4985.jpg (41.08 KiB) Viewed 57 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!

[dastels]

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

Can you make a new topic for this rather than hijacking this one, please.

Dave