Question

Implement the luminosity control of a street lighting lamp which has 3 different levels of intensity according to the level of darkness. Using Arduino

the question is complete, it is a luminosity controller for a led with 3 levels of brightness.

Answer 1

#define LIGHT_IN A0
//using the Light Dependent Resistor output to analog pin A0

#define LED_CONTROL 5
//led control pin in digital pin 5

#define DARK_LEVEL_1 340
//too dark

#define DARK_LEVEL_2 780
//medium dark

#define DARK_LEVEL_3 1024
//bright room

#define INT_LEVEL_1 85
//low intensity for led

#define INT_LEVEL_2 170
//medium intesity for led

#define INT_LEVEL_3 255
//high intensity for led

void setup()
{
   pinMode(LED_CONTROL, OUTPUT);
   //setting the LED_CONTROL(PWM) pin as output pin
}

void loop()
{
   float val = analogRead(LIGHT_IN);
   //read the analog pin A0 value to get the light luminosity
  
   if(val < DARK_LEVEL_1)
   {
       analogWrite(LED_CONTROL, INT_LEVEL_3);
       //if it's too dark, then glow the led with maximum brightness
   }
   else if(val < DARK_LEVEL_2)
   {
       analogWrite(LED_CONTROL, INT_LEVEL_2);
       //if it's medum dark, then glow the led with medium brightness
   }
   else
   {
       analogWrite(LED_CONTROL, INT_LEVEL_1);
       //if it's too bright, then glow the led with minimum brightness
   }
}

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