Studio Director: /* Source code */

2026-03-04T11:30:18Z

Source code

← Older revision		Revision as of 11:30, 4 March 2026
Line 28:		Line 28:

	Important functions:		Important functions:
	* '''random()'''
	* '''randomSeed()'''
	* '''addLeds()'''		* '''addLeds()'''
	* '''setBrightness()'''		* '''setBrightness()'''

Studio Director at 11:29, 4 March 2026

2026-03-04T11:29:50Z

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 === Source code ===
 <pre>
 // include library

Studio Director: Created page with "= LED strip = * RS product: https://se.rs-online.com/web/p/led-ljuslister/1807500?gb=s ** Datasheet: https://docs.rs-online.com/c4c2/0900766b816d3d12.pdf == Dependencies == * Install the library FastLED: https://github.com/FastLED/FastLED Documentation: https://github.com/FastLED/FastLED/wiki/Overview Basic usage: https://github.com/FastLED/FastLED/wiki/Basic-usage == Examples online == * https://learn.adafruit.com/adafruit-neopixel-uberguide/the-magic-of-neop..."

2026-03-04T11:21:48Z

Created page with "= LED strip = * RS product: https://se.rs-online.com/web/p/led-ljuslister/1807500?gb=s ** Datasheet: https://docs.rs-online.com/c4c2/0900766b816d3d12.pdf == Dependencies == * Install the library FastLED: https://github.com/FastLED/FastLED ** Documentation: https://github.com/FastLED/FastLED/wiki/Overview ** Basic usage: https://github.com/FastLED/FastLED/wiki/Basic-usage == Examples online == * https://learn.adafruit.com/adafruit-neopixel-uberguide/the-magic-of-neop..."

New page

= LED strip =

* RS product: https://se.rs-online.com/web/p/led-ljuslister/1807500?gb=s
** Datasheet: https://docs.rs-online.com/c4c2/0900766b816d3d12.pdf

== Dependencies ==
* Install the library FastLED: https://github.com/FastLED/FastLED
** Documentation: https://github.com/FastLED/FastLED/wiki/Overview
** Basic usage: https://github.com/FastLED/FastLED/wiki/Basic-usage

== Examples online ==
* https://learn.adafruit.com/adafruit-neopixel-uberguide/the-magic-of-neopixels
* https://create.arduino.cc/projecthub/whimsy-makerspace/arduino-compatible-nano-neopixel-controller-6f0c4b

== How to use ==

[[File:Fastled-library.png|thumb]]

Install the FastLED library in the Arduino IDE.

=== How to connect the LED strip ===

Make sure the arrows are pointing to the right direction. The beginning of an arrow indicates the connection point to the Arduino board. The tip of the arrow show how the current flows in the strip.

[[File:Fastled-connect bb.png|thumb]]

=== Source code ===
<pre>
// include library
#include<FastLED.h>

//define number of LED and pin
#define NUM_LEDS 4
#define DATA_PIN 3

// create the ld object array
CRGB leds[NUM_LEDS];

// define 3 byte for the random color
byte r, g, b;
float brightness;

void setup() {
Serial.begin(9600);
// init the LED object
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
// set random seed
randomSeed(analogRead(0));
}

void loop() {
// loop over the NUM_LEDS
for (int cur = 0; cur < NUM_LEDS; cur++) {
brightness = 50.0 / pow(2, cur);
FastLED.setBrightness(brightness); // range: 0-255
r = random(150, 200);
g = random(100, 150);
b = random(0, 50);
//set the value to the led AND turn on
leds[cur] = CRGB(r, g, b); FastLED.show();
FastLED.delay(200);
// turn off previous
leds[cur] = CRGB::Black; FastLED.show();
Serial.println(cur, DEC);
}
}
</pre>

Programmable LEDs - Revision history

Studio Director: /* Source code */

Studio Director at 11:29, 4 March 2026