Nightlight LED not working

[anthonyenzopace]

I made an Arduino design that is supposed to make the LED turn on when it gets below a certain light level. This design worked before so it should still work but it doesn't. Instead, the serial monitor that shows me the light level stays at 300-330 no matter what the light level in the room is. This is my design and my Arduino code with the serial monitor:

[groundFungus]

Is it the sim that does not work or a real circuit with a real Uno?

Pictures of code are suboptimal. Read the forum guidelines to see how to properly post code.
Use the IDE autoformat tool (ctrl-t or Tools, Auto format) before posting code in code tags.

We would rather see a schematic. See the how to make a schematic that you can post tutorial.

[kyriakos1073]

Change the analogRead(2) to analogRead(A2) or analogRead(16).

[groundFungus]

For a real Arduino, analogRead(2); will work the same as analogRead(A2); or anaogRead(16);. See the source code in wiring_analog.c.

[anthonyenzopace]

the real circuit. that image is just a sim of the circuit i made

[groundFungus]

Are you going to post your code properly so that we can copy the code to our IDE? Can't do much with an image of code.

[groundFungus]

Your loop is running really fast. I suggest that you put in a delay to run the loop slower. I use the millis() function like in the blink without delay example. Here is 10 samples per second.

const byte ldrPin = A2;
const byte ledPin = 11;

int val = 0;

void setup()
{
   Serial.begin(9600);
   pinMode(ledPin, OUTPUT);   
}

void loop()
{
   static unsigned long timer = 0;
   unsigned long interval = 100;
   if (millis() - timer >= interval)
   {
      timer = millis();
      val = analogRead(ldrPin);
      Serial.println(val);
   }   
}