For this task, we use three Photo sensors to control RGB LED. And an RGB LED is a combination of three LEDs in just one package: red, green and blue. It generates different colors by adjusting the brightness of each of the three LEDs of the RGB LED.
- Input: 3 pins for photo sensors (analog)
- Output: 3 pins for three LED (digital by PWM)
- Conditions
- Read the values coming through photosensors
- Light on RGB LED following the signal values
int LDR1_val;int LDR2_val;int LDR3_val;const int LED_R = 9;const int LED_G = 10;const int LED_B = 11;const int LDR1 = A0;const int LDR2 = A1;const int LDR3 = A2;void setup() {Serial.begin(9600);pinMode(LED_R,OUTPUT);pinMode(LED_G,OUTPUT);pinMode(LED_B,OUTPUT);}void loop() {LDR1_val = analogRead(LDR1);delay(5);LDR2_val = analogRead(LDR2);delay(5);LDR3_val = analogRead(LDR3);delay(5);LDR1_val = map(LDR1_val,0,1023,0,255);LDR2_val = map(LDR2_val,0,1023,0,255);LDR3_val = map(LDR3_val,0,1023,0,255);Serial.print(LDR1_val);Serial.print(" ");Serial.print(LDR2_val);Serial.print(" ");Serial.println(LDR3_val);if(LDR1_val >=20){digitalWrite(LED_R,HIGH);}else{digitalWrite(LED_R,LOW);}if(LDR2_val >=30){digitalWrite(LED_G,HIGH);}else{digitalWrite(LED_G,LOW);}if(LDR3_val >=40){digitalWrite(LED_B,HIGH);}else{digitalWrite(LED_B,LOW);}}
// prepared by Mr. Rothny
//Lead by Dr. Kwanghoon Kim
//Lead by Dr. Kwanghoon Kim
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