Led lamp - Neopixel Ring 24 with Arduino Uno.

Description

I've created a LED lamp controlled by an Arduino Uno, you can modify the code to change the light pattern. I've added a pattern that imitates a fire. You can search for tutorials online for using an arduinop with a neo pixel ring, it's pretty simple and you can find different light patterns. Hope you enjoy! ARDUINO CODE: /** * Arduino Uno - NeoPixel Fire * v. 1.0 * Copyright (C) 2015 Robert Ulbricht * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include // data pin #define PIN 2 // led count #define CNT 24 // Parameter 1 = number of pixels in strip // Parameter 2 = pin number (most are valid) // Parameter 3 = pixel type flags, add together as needed: // NEO_RGB Pixels are wired for RGB bitstream // NEO_GRB Pixels are wired for GRB bitstream // NEO_KHZ400 400 KHz bitstream (e.g. FLORA pixels) // NEO_KHZ800 800 KHz bitstream (e.g. High Density LED strip) Adafruit_NeoPixel strip = Adafruit_NeoPixel(CNT, PIN, NEO_GRB + NEO_KHZ800); uint32_t fire_color = strip.Color ( 80, 35, 00); uint32_t off_color = strip.Color ( 0, 0, 0); /// /// Fire simulator /// class NeoFire { Adafruit_NeoPixel &strip; public: NeoFire(Adafruit_NeoPixel&); void Draw(); void Clear(); void AddColor(uint8_t position, uint32_t color); void SubstractColor(uint8_t position, uint32_t color); uint32_t Blend(uint32_t color1, uint32_t color2); uint32_t Substract(uint32_t color1, uint32_t color2); }; /// /// Constructor /// NeoFire::NeoFire(Adafruit_NeoPixel& n_strip) : strip (n_strip) { } /// /// Set all colors /// void NeoFire::Draw() { Clear(); for(int i=0;i { AddColor(i, fire_color); int r = random(80); uint32_t diff_color = strip.Color ( r, r/2, r/2); SubstractColor(i, diff_color); } strip.show(); } /// /// Set color of LED /// void NeoFire::AddColor(uint8_t position, uint32_t color) { uint32_t blended_color = Blend(strip.getPixelColor(position), color); strip.setPixelColor(position, blended_color); } /// /// Set color of LED /// void NeoFire::SubstractColor(uint8_t position, uint32_t color) { uint32_t blended_color = Substract(strip.getPixelColor(position), color); strip.setPixelColor(position, blended_color); } /// /// Color blending /// uint32_t NeoFire::Blend(uint32_t color1, uint32_t color2) { uint8_t r1,g1,b1; uint8_t r2,g2,b2; uint8_t r3,g3,b3; r1 = (uint8_t)(color1 >> 16), g1 = (uint8_t)(color1 >> 8), b1 = (uint8_t)(color1 >> 0); r2 = (uint8_t)(color2 >> 16), g2 = (uint8_t)(color2 >> 8), b2 = (uint8_t)(color2 >> 0); return strip.Color(constrain(r1+r2, 0, 255), constrain(g1+g2, 0, 255), constrain(b1+b2, 0, 255)); } /// /// Color blending /// uint32_t NeoFire::Substract(uint32_t color1, uint32_t color2) { uint8_t r1,g1,b1; uint8_t r2,g2,b2; uint8_t r3,g3,b3; int16_t r,g,b; r1 = (uint8_t)(color1 >> 16), g1 = (uint8_t)(color1 >> 8), b1 = (uint8_t)(color1 >> 0); r2 = (uint8_t)(color2 >> 16), g2 = (uint8_t)(color2 >> 8), b2 = (uint8_t)(color2 >> 0); r=(int16_t)r1-(int16_t)r2; g=(int16_t)g1-(int16_t)g2; b=(int16_t)b1-(int16_t)b2; if(r<0) r=0; if(g<0) g=0; if(b<0) b=0; return strip.Color(r, g, b); } /// /// Every LED to black /// void NeoFire::Clear() { for(uint16_t i=0; i strip.setPixelColor(i, off_color); } NeoFire fire(strip); /// /// Setup /// void setup() { strip.begin(); strip.show(); // Initialize all pixels to 'off' } /// /// Main loop /// void loop() { fire.Draw(); delay(random(50,150)); }

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