color sensor

thingiverse

The resistances for the LEDs are 150 ohms and 10 kilohms for the detector. The code: /* * Color sensor using blue, green, and red LEDs and photodiode * by Desperado */ #define blue A0 #define green A1 #define red A2 int color_blue; int color_green; int color_red; int max_value = 0; int min_value = 0; void setup() { pinMode(blue, INPUT); pinMode(green, INPUT); pinMode(red, INPUT); Serial.begin(9600); } void loop() { color_blue = analogRead(blue); color_green = analogRead(green); color_red = analogRead(red); Serial.print("blue: "); Serial.println(color_blue); Serial.print("red: "); Serial.println(color_red); Serial.print("green: "); Serial.println(color_green); Serial.println(); // Detection of white if (color_blue <= 300 && color_red <= 80 && color_green >= 55) { Serial.println("WHITE"); } // detection of blue else if (color_blue <= 350 && color_red >= 135 && color_green <= 100) { Serial.println("BLUE"); } // detection of green else if (color_blue >= 380 && color_red <= 140 && color_green >= 90) { Serial.println("GREEN"); } // detection of red else if (color_blue >= 380 && color_red <= 80 && color_green <= 85) { Serial.println("RED"); } // detection of black else if (color_blue >= 460 && color_red >= 170 && color_green >= 130) { Serial.println("BLACK"); } // unknown color else { Serial.println("UNKNOWN COLOR"); } Serial.println(); delay(1000); }