Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [led-strip]

87 questions
13
votes
6 answers

Addressable RGB strip works fine individually but cannot set all LEDs to full white

I have a 5 meter strip of 12V digital RGB LEDs. The chip is WS2811 (see photo of IC). There are 50 addresses on the strip. Using the FastLED library, I am able to run the "FirstLight" example that chases full white with a single address at a time,…
Bort
  • 397
  • 2
  • 6
  • 18
4
votes
2 answers

FastLed LED Strip Output Checksum

I am wondering if anyone has ever connected the output of their LED strip back to the Arduino to read and make sure the strip is functioning correctly, kinda like checksum functionality. I am using the FastLed library and it doesn't appear that this…
Jorb
  • 41
  • 1
3
votes
1 answer

Pass Color to a function without using a specific Adafruit_NeoPixel

I'm initializing my strips as an array: // Declare NeoPixel strip array: Adafruit_NeoPixel strip[] = { Adafruit_NeoPixel(LED_COUNT[0], LED_PIN[0], NEO_RGBW + NEO_KHZ800), Adafruit_NeoPixel(LED_COUNT[1], LED_PIN[1], NEO_RGBW + NEO_KHZ800), …
Johnny Rollerfeet
  • 85
  • 6
3
votes
1 answer

FastLED library: How can I adjust the brightness of a single pixel on an absolute scale?

I'm using the FastLED library to control a digital RGB LED strip. While this library seems very comprehensive in capability and ease of use, I do not yet see a way to simply set the brightness value of a individual pixel on an absolute scale. In…
Bort
  • 397
  • 2
  • 6
  • 18
3
votes
3 answers

What can I do to increase the amount of LEDs I can power with a pro micro?

I am new to arduino and have a sparkfun pro micro that I'm using to power a one meter (60 pixels) APA 102 strip. I currently power it via USB and have a program that sends lighting instructions to it. I can only seem to power ~15 pixels with full…
BoatHouse
  • 57
  • 5
3
votes
1 answer

Using 18650 batteries with a 3.7v to 5v boost converter

I'm looking to set up a 1-meter strip of WS2812B LEDs (60 LEDs) with an off-the-shelf RF LED controller with a remote. The LEDs want a 5V supply - I've tried running them off 3.7v but the colour accuracy goes out the window and they start flickering…
poolski
  • 33
  • 1
  • 3
3
votes
2 answers

FastLED fill_rainbow - Unexpected red pixel

I'm using FastLEDs builtin fill_rainbow function for generating a rainbow spectrum on an LED strip. The issue is, I get a random red pixel midway through the yellow region. I've tried it on 3 different Arduino nano's, and two different LED-strips.…
Tehanu
  • 31
  • 1
  • 3
3
votes
2 answers

Setting 10 RGB Strips Independently from Single Arduino

I want to control 10 different 12V RGB LED strips independently from a single Arduino. As a clarification - I've setup a bunch of NeoPixels and understand how to wire and control them independently. So now I'm looking to do something similar but…
Dan B
  • 33
  • 1
  • 5
2
votes
1 answer

Motion-activated lights

I am attempting to follow this tutorial to light up a dark staircase with motion-activated LED strips. If my understanding of the tutorial is correct, essentially the Arduino's job is to power or depower transistors at the appropriate time to…
Eidan Jacob
  • 23
  • 4
2
votes
0 answers

Can the Blink class be used on a 5v to 240v relay?

I have found the following code and it works fine on a breadboard controlling small LEDs but I want it to work with LED strip lighting with external 240v transformers. We have built the circuit using a 5v to 240v relay and the connections are…
Zed
  • 21
  • 2
2
votes
3 answers

Issue with bluetooth and a large number LED strip

I want to be able to control multiple LED strip via bluetooth with one arduino. I coded my own android app and everything work fine with one or two led strip with few pixel. But as soon as I had to many pixel data send by BT is missing a few byte…
Antoine Bacquet
  • 21
  • 1
2
votes
0 answers

My LED display fails with MSGEQ7 output stuck

I have an Arduino setup with a pro-mini, a MSGEQ7, and a auto-gain mic. Even if I remove the audio input to the MSGEQ7 remains the same in the 890s (out of 1024). It's the same on each of two new MSGEQ7. I've checked the schematics,…
mystack
  • 21
  • 2
2
votes
0 answers

How to test continuity on signal wire?

I’m reassembling an LED strip, SK6812, that I had cut into smaller lengths. I don’t have a lot of faith in the connectors I’m using or my ability to solder, so I’d like to test it before I put power to it. A simple continuity test is easy for the…
Johnny Rollerfeet
  • 85
  • 6
2
votes
1 answer

Bicycle Tail Light project

For my college course we currently have to carry out a project of our own choice. I chose to make a Tail light system, with strobing indicators, fog-light and brake-light. The lighting uses Neopixel strips and rings, with the indicator sections…
Tay Swain
  • 21
  • 1
2
votes
1 answer

Pca9685 & WS2818B, 1 Nano

Arduino n00b here. I currently have an Arduino Nano set up to run 6 servos from a PCA9685 board. I'm looking to add 6 switches and 6 LED indicators to switch servo positions. What I'm curious about is how to connect the WS2818B. I know they can be…
brbecker87
  • 21
  • 2
1
2 3 4 5 6