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  • Author Author: fearless
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Hats Off Mardi Gras - Circle Layout, Wiring & Code (Part 5)

fearless

I'm finally at the point where I get to put all my NeoPixels into place and get them wired up. The only sensor that I will be using is the photocell. It's purpose is to detect the light levels and turn off the NeoPixel sequence, if the environment is too bright. I had a bit of a problem after soldering the NeoPixels into place, but with Wayne's help, we were able to overcome it.

 

Here's a video going over my discoveries and progress:

 

I used the Adafruit NeoPixel strip loop coding with just a few changes. Here is the final code that I will be using:

 

#include <Adafruit_NeoPixel.h>


#define PIN 0


int photocell = 1;
int photocellReading;


Adafruit_NeoPixel strip = Adafruit_NeoPixel(7, PIN, NEO_GRB + NEO_KHZ800);




void setup() {
  pinMode(photocell, INPUT);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}


void loop() {
  //read photocell looking for unlit room
  photocellReading = analogRead(photocell);
  //lighting is dim, run the neopixels
  if(photocellReading < 300){
      colorWipe(strip.Color(255, 0, 0), 0); // Red
      delay(3000);
      colorWipe(strip.Color(0, 0, 255), 0); // Blue
      delay(3000);
      colorWipe(strip.Color(0, 255, 0), 0); // Green
      delay(3000);
      colorWipe(strip.Color(110, 0, 140), 0); // Purple
      delay(3000);
      colorWipe(strip.Color(217, 187, 1), 0); // Gold
      delay(3000);
  }else{
    //lighting is bright, shut down the neopixels
      colorWipe(strip.Color(0,0,0),0);
      delay(5000);
  }


}


// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint16_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {  
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}

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