Question

Write an Arduino program to continuously read the value of pin A1. The program lights up an LED connected to pin 5 if the value of A1 is greater than 300. If the value of A1 is less than 50, the program lights up an LED connected to pin 10.

Answer 1

CODE:

int ledPin1 = 5;   //Declaring Digital pin 5 as reference variable 'ledPin1'
int ledPin2 = 10;   //Declaring Digital pin 10 as reference variable 'ledPin2'
int analogPin = 1;   //Declaring analog pin A1 as reference variable 'analogPin'
int val = 0;   //to store analog pin values
void setup()
{
Serial.begin(9600); // setup serial communication
//set ledPin1 and ledPin2 as outputs
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
}

void loop()
{
   val = analogRead(analogPin);   //Read the data from the pin
   //switching on LED1
   if(val > 300){
       digitalWrite(ledPin1, HIGH);
   }
   //switching on LED2
   else if(val < 50){
       digitalWrite(ledPin2, HIGH);
   }
   //put a delay of 1 second, remove it if not necessary
   delay(1000);
}