ArduinoTimer1Neopixels.ino

#include "TimerOne.h"
#include <Adafruit_NeoPixel.h>

#define PIN            6  // neopixel pin

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS      16

bool pixOn = false; //holds current value of pixels

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
 
void setup()
{
  pixels.begin(); // This initializes the NeoPixel library.


  // setup timer interrupt
  Timer1.initialize(33333);         // initialize timer1, and set period in microseconds (1,000,000 (1 sec) / 30 = ~33,333
  Timer1.attachInterrupt(neopixelFunc);  // attaches neopixelFunc() as a timer overflow interrupt
}
 
// this will run 33 times a second.
void neopixelFunc()
{
  // neopixel code here

  for(int i=0;i<NUMPIXELS;i++){

    if(pixOn){
      // pixels are on, turn them off
      // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
      pixels.setPixelColor(i, pixels.Color(0,0,0)); // Moderately bright green color.
    } else {
     // pixels are off, turn them on
      pixels.setPixelColor(i, pixels.Color(0,150,0)); // Moderately bright green color.
    }

    pixels.show(); // This sends the updated pixel color to the hardware.
  }
  
   // switch state of pixel value
    pixOn = !pixOn;
  
}
 
void loop()
{
  // your program here...
}