Hi there, i'm a novice of Arduino and the Fastled library.

Umberto_Ippoliti · May 27, 2016, 10:09am

Hi there,
i’m a novice of Arduino and the Fastled library.
I have a question: is it possible drive a group of led in a strip instead once at time?
For example:

i have a 60 led strip WS2812b
i want to switch on only the led n. 5-6-7-8-9 and 20-21-22-23-24

I’d like to use this method to create a 7 segments display with a single strip.

Thanks a lot.
Umberto.

marmil · May 27, 2016, 2:51pm

CRGBset might work for your project allowing you to setup a group of pixels for each “segment”.
Here’s a basic example:

github.com

marmilicious/FastLED_examples/blob/master/CRGBSet_example.ino

// Marc Miller, Jan 2016

#include "FastLED.h"
#define NUM_LEDS 32

//CRGB leds[NUM_LEDS];  // Not using this.  Using CRGBArray instead.
CRGBArray<NUM_LEDS> leds;

CRGBSet partA(leds(6,9));  // Define custom pixel range with a name.
CRGBSet partB(leds(22,25));  // Define custom pixel range with a name.

CHSV colorOne(0,222,255);  // Define a custom color.
CHSV colorTwo(82,222,255);  // Define a custom color.

//---------------------------------------------------------------
void setup() { 
  FastLED.addLeds<LPD8806, 11, 13, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);
}

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