Farbsensor

#include <Wire.h>
#include "Adafruit_TCS34725.h"

// Pick analog outputs, for the UNO these three work well
// use ~560  ohm resistor between Red & Blue, ~1K for green (its brighter)
#define redpin 3
#define greenpin 5
#define bluepin 6
// for a common anode LED, connect the common pin to +5V
// for common cathode, connect the common to ground

// set to false if using a common cathode LED
#define commonAnode true

// our RGB -> eye-recognized gamma color
byte gammatable[256];


Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_50MS, TCS34725_GAIN_4X);

void setup() {
    Serial.begin(9600);
    Serial.println("Color View Test!");

    if (tcs.begin()) {
        Serial.println("Found sensor");
    } else {
        Serial.println("No TCS34725 found ... check your connections");
        while (1); // halt!
    }

    // use these three pins to drive an LED
    pinMode(redpin, OUTPUT);
    pinMode(greenpin, OUTPUT);
    pinMode(bluepin, OUTPUT);

    // thanks PhilB for this gamma table!
    // it helps convert RGB colors to what humans see
    for (int i = 0; i < 256; i++) {
        float x = i;
        x /= 255;
        x = pow(x, 2.5);
        x *= 255;

        if (commonAnode) {
            gammatable[i] = 255 - x;
        } else {
            gammatable[i] = x;
        }
        //Serial.println(gammatable[i]);
    }
}


void loop() {
    uint16_t clear, red, green, blue;

    tcs.setInterrupt(false);      // turn on LED

    delay(60);  // takes 50ms to read

    tcs.getRawData(&red, &green, &blue, &clear);

    tcs.setInterrupt(true);  // turn off LED

    Serial.print("C:\t"); Serial.print(clear);
    Serial.print("\tR:\t"); Serial.print(red);
    Serial.print("\tG:\t"); Serial.print(green);
    Serial.print("\tB:\t"); Serial.print(blue);

    // Figure out some basic hex code for visualization
    uint32_t sum = clear;
    float r, g, b;
    r = red; r /= sum;
    g = green; g /= sum;
    b = blue; b /= sum;
    r *= 256; g *= 256; b *= 256;
    Serial.print("\t");
    Serial.print((int)r, HEX); Serial.print((int)g, HEX); Serial.print((int)b, HEX);
    Serial.println();

    //Serial.print((int)r ); Serial.print(" "); Serial.print((int)g);Serial.print(" ");  Serial.println((int)b );

    analogWrite(redpin, gammatable[(int)r]);
    analogWrite(greenpin, gammatable[(int)g]);
    analogWrite(bluepin, gammatable[(int)b]);
}