I'd like to adjust the brightness of one LED based on the distance measured by the distance sensor.
Distance is low (Object is nearby) -> LED should be brighter
Distance is high (Object is away) -> LED should be lower brightness
This should be done with 2 cases:
if distance is between 0 and 250 cm, led should be high brightness.
if distance is between 251 and 500 cm, led should be low brightness.
We ignore any readings above 500 cm.
Here's the code I'm using for the distance sensor, the LED part hasn't been added yet.
Thank you
#define trigPin1 2 //initialize pins
#define echoPin1 3
#define trigPin2 4
#define vibrator1 8
long duration, distance, Sensor1;
void setup()
{
Serial.begin (9600);
pinMode(trigPin1, OUTPUT);
pinMode(echoPin1, INPUT);
}
void loop() {
SonarSensor(trigPin1, echoPin1);
Sensor1 = distance;
Serial.print(Sensor1);} //print distance
void SonarSensor(int trigPin,int echoPin) //calculates distance from sensor
{
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH); //emits ultrasonic wave
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH); // calculates the time between sending and receiving
distance = (duration/2) / 29.1; // use the time and velocity of the ultrasonic wave to find distance
delay(250);}