Rainbow
Strip (60 LEDs)
60 LEDs
50%
WebGL LED Strip Simulation ⚡
60 LEDs•WebGL Accelerated•Instance Rendering•● Running● 0f
Rainbow (WebGL)
0 FPS
Effect Controls
Rainbow
Classic FastLED rainbow using fill_rainbow function
Effect 1 of 17
0%100%
Fast is realistic (capped at 60 FPS)
7
Distance between hues (lower = wider rainbow bands, higher = tighter)
FastLED Code
Rainbow
Classic FastLED rainbow using fill_rainbow function
Effect Implementation
void rainbow() {
fill_rainbow(leds, NUM_LEDS, gHue, 7);
}📋 Copy & Paste Ready
Click "Copy Sketch" to get a complete Arduino program. Paste it into Arduino IDE, connect your WS2812B strip to pin 6, and upload!
🔬 How It Works
This exact code is running in the simulation above. The FastLED emulation layer translates these function calls into visual output that matches real hardware behavior.
⚡ Hardware Requirements
• Arduino Uno/Nano or ESP32/ESP8266
• WS2812B LED strip (60 LEDs recommended)
• 5V power supply for LEDs
• 470Ω resistor on data line (optional but recommended)
WebGL LED Strip Simulation ⚡
60 LEDs•WebGL Accelerated•Instance Rendering•● Running● 0f
Rainbow (WebGL)
0 FPS
Rainbow
Effect Controls
Rainbow
Classic FastLED rainbow using fill_rainbow function
Effect 1 of 17
0%100%
Fast is realistic (capped at 60 FPS)
7
Distance between hues (lower = wider rainbow bands, higher = tighter)