#include <Adafruit_NeoPixel.h>
#ifdef AVR
#include <avr/power.h>
#endif
int outputValue=0;
int rememberOutputValue;
int randNumber;
int counter = 0;
int loopCounter = 0;
#define PIN 6
#define NUMPIXELS 60
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
// put your setup code here, to run once:
pixels.begin();
randomSeed(analogRead(0));
Serial.begin(9600);
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
WheelPos = 255 - WheelPos;
if(WheelPos < 85) {
return pixels.Color(255 - WheelPos * 3, 0, WheelPos * 3,0);
}
if(WheelPos < 170) {
WheelPos -= 85;
return pixels.Color(0, WheelPos * 3, 255 - WheelPos * 3,0);
}
WheelPos -= 170;
return pixels.Color(WheelPos * 3, 255 - WheelPos * 3, 0,0);
}
void loop() {
// put your main code here, to run repeatedly
// read the analog in value 100 times and count high levels
int sensorValue;
counter = 0;
for (int i=0; i < 100; i++)
{
sensorValue = analogRead(A0);
if(sensorValue > 250) counter++;
}
if(map(counter, 0, 60, 0, 24) > outputValue)outputValue = map(counter, 0, 40, 0, 24);
else if(loopCounter %2 == 0)outputValue-=1;
if(outputValue < 0) outputValue = 0;
if(outputValue > 60) outputValue = 60;
if(loopCounter % 60 == 0)randNumber = random(255);
loopCounter++;
// clear all LEDs
for(int i=0;i < NUMPIXELS;i++){
// pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
pixels.setPixelColor(i, pixels.Color(0,0,0, 255));
}
if(rememberOutputValue != outputValue)
{
for(int i=60;i > (60-outputValue) || (outputValue == 60 && i == 0);i--){
pixels.setPixelColor(i, Wheel((randNumber) & 255));
}
pixels.show(); // This sends the updated pixel color to the hardware
}
rememberOutputValue = outputValue;
}