/*
  Proficiency test Exp 1

  OU ECE 5520 Fall24

  Amr Shiekhidris

*/ 


// defines pins numbers
const int Potentiometer = A0;  // Use A0 for analog input pin

const int Red = 11;
const int Green = 10;
const int Blue = 9;
const int Yellow = 8;
// defines variables
int value = 0;
float voltage = 0;

void setup() {
  pinMode(Potentiometer, INPUT);  // Set potentiometer as input

  pinMode(Red, OUTPUT);
  pinMode(Green, OUTPUT);
  pinMode(Blue, OUTPUT);
  pinMode(Yellow, OUTPUT);

  Serial.begin(9600); // Starts the serial communication
}

void loop() {
  // Read the analog value from the potentiometer (0 to 1023)
  value = analogRead(Potentiometer);

  // Convert the analog value to a voltage (0 to 5V)
  voltage = value * (5.0 / 1023);  

  // Print the voltage on the Serial Monitor for debugging
  Serial.print("Voltage: ");
  Serial.println(voltage);

  // Check which range the voltage falls into and turn on the corresponding LED
  if (voltage >= 1.0 && voltage < 2.0) {
    digitalWrite(Red, HIGH);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, LOW);
    digitalWrite(Yellow, LOW);
  }
  else if (voltage >= 2.0 && voltage < 3.0) {
    digitalWrite(Red, LOW);
    digitalWrite(Green, HIGH);
    digitalWrite(Blue, LOW);
    digitalWrite(Yellow, LOW);
  }
  else if (voltage >= 3.0 && voltage < 4.0) {
    digitalWrite(Red, LOW);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, HIGH);
    digitalWrite(Yellow, LOW);
  }
  else if (voltage >= 4.0 && voltage <= 5.0) {
    digitalWrite(Red, LOW);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, LOW);
    digitalWrite(Yellow, HIGH);
  }
  else {
    // Default: turn all LEDs off if outside the voltage range
    digitalWrite(Red, LOW);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, LOW);
    digitalWrite(Yellow, LOW);
  }

  delay(500);  // Small delay for stability
}