Help with light sensor!

Other Hardware Sensors
1

I am trying to use a light sensor to initiate my code. For example, If it gets dark outside I want the sensor to run a code when it's dark enough.

2

Okay, and? What's the problem? Code, hardware, or both? You haven't shown us anything, so there's nothing anyone can do until you rectify that.

3

here is the code.

#include <Servo.h>
const int buzzer = 4; //buzzer to arduino pin 9


Servo myservo;  

int pos = 0;    

void setup() {
  myservo.attach(3);  //attaches servo to pin 3
  pinMode(7,OUTPUT);
    pinMode(8,OUTPUT);
   pinMode(buzzer, OUTPUT); 

}

void loop() {
   
 
  {digitalWrite(7,HIGH);//blinks led on and off
   digitalWrite(8,HIGH);
  delay(1000);
   digitalWrite(7,LOW);
    digitalWrite(8,LOW);
     delay(1000);
    digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
   delay(1000);
}
  
   for (pos = 0; pos <= 180; pos += 1) {//moves servo in sweeping motion
     myservo.write(pos);              
    delay(65);  }  
   {
  tone(buzzer,1000);

  }
 
     {digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
  delay(100);
   digitalWrite(7,LOW);
    digitalWrite(8,LOW);
     delay(100);
    digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
   delay(100);
      noTone(buzzer);
}
  
  
  for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);              
    delay(65); }
  {
   
  }
 

  

 digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
  delay(1000);
   digitalWrite(7,LOW);
    digitalWrite(8,LOW);
     delay(1000);
    digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
   delay(1000);

  
   for (pos = 0; pos <= 180; pos += 1) {
     myservo.write(pos);              
    delay(65);  }  
   {
  tone(buzzer,1000);//makes sound
delay(100);
noTone(buzzer);

  }
 
     {digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
  delay(100);
   digitalWrite(7,LOW);
    digitalWrite(8,LOW);
     delay(100);
    digitalWrite(7,HIGH);
   digitalWrite(8,HIGH);
   delay(100);
tone(buzzer,1000)
delay(100)
      noTone(buzzer);
}
  
  
  for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);              
    delay(65); }
delay(300000);//waits for 5 min
  {
   
  }
 

  
}
4

And the light sensor is, what exactly? Hooked up how?

If you want help, start providing details.

5

When you get around to picking a light sensor, let us know the details.

6

For better readability, you should not use magic numbers. The I/O pins love to have a functional name.

7

and for even better readability, put your repeated code as a function - especially if its tested and working correctly.

How are we supposed to know what is connected to pin 8?

8

number 8 is for the second led

9

my bad :sweat_smile: