Light level meter using arduino and LDR

This is a simple Light level meter using arduino UNO and LDR.
You can change the sensitivity by change the number that written after "Light /" in programming code.
for making this project you don't need to use light sensor module(only LDR and 10K resistor).

int led[10] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
int adjust = 0;
int Light, i;

void setup()
{
for (i=0;i<10; i++)
pinMode(led[i], OUTPUT);
Serial.begin(9600);
}

void loop()
{
Light = analogRead(adjust);
Serial.println(Light);
Light = Light / 50;
Serial.println(Light);

if (Light == 0)
{
for(i = 0; i < 10; i++)
{
digitalWrite(led[i], LOW);
}
}

else
{
for(i = 0; i < Light; i++)
{
digitalWrite(led[i], HIGH);
}

for(i = i; i < 10; i++)
{
digitalWrite(led[i], LOW);
}
}
delay(100);

}

categories : arduino