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From a, 5 Years ago, written in C.
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  1. #include <LiquidCrystal.h>
  2.  
  3. #define red 11
  4. #define green 12
  5. #define blue 13
  6.  
  7. float lightIntensity;
  8.  
  9. LiquidCrystal lcd (13,12,11,10,9,8);
  10.  
  11. void setup() {
  12.   // put your setup code here, to run once:
  13.   pinMode(red, OUTPUT);
  14.   pinMode(green, OUTPUT);
  15.   pinMode(blue, OUTPUT);
  16.  
  17.   Serial.begin(9600);
  18.  
  19. }
  20.  
  21. void loop() {  
  22.   lightIntensity = analogRead(0);
  23.   float temp = lightIntensity /2.0 -50.0;
  24.   Serial.print(lightIntensity);
  25.   lcd.setCursor(0,0);
  26.   lcd.print(temp);
  27.   delay(1000);
  28. //  Serial.println(lightIntensity);
  29. //  if(lightIntensity  > 500){
  30. //
  31. //  //if(digitalRead(light) == HIGH){
  32. //    digitalWrite(red, LOW);
  33. //    digitalWrite(green, HIGH);
  34. //    //delay(3000);
  35. //  }else{
  36. //    digitalWrite(red, HIGH);
  37. //    digitalWrite(green, LOW);
  38. //  }
  39. }

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