Hello,
I have a light sensor, and, if it's dark outside, i want to turn ON an LED with a fading effect.
I have made the program but it doesn't wirok properly:
/*
AnalogReadSerial
Reads an analog input on pin 0, prints the result to the serial monitor.
Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
This example code is in the public domain.
*/
const int led = 3;
// the setup routine runs once when you press reset:
int brightness = 0; // how bright the LED is
int fadeAmount = 5; // how many points to fade the LED by
void setup() {
pinMode (led, OUTPUT); // sets pin 13 as digital output
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
if(sensorValue < 200 )
{
brightness = brightness + fadeAmount;
delay(80);
analogWrite(led, brightness);
}
else
{
analogWrite(led, 0);
brightness = 0;
}
delay(10); // delay in between reads for stability
}
If it's dark outside, the LED is turning ON with the fading effect but as soon as the LED hits 255 brightness, it starts all over again from 0 to 255 brightness.
How can I make the LED stay ON after his brighness goes from 0 to 255?