//Student name: Ngan Hoi Sing
//Class: EG524403-1A
//Student number: 230292338

//https://wokwi.com/projects/382613722133605377

// Program: Ex6C_Analog_Output-E.ino
/*
   Exercise 6 Q3

   Change the program of Ex6C_Analog_Output-E to:
   1. Fully turn on the LED at 3.3V from VR
   2. Dim the LED to zero intensity at 0V from VR
*/

#define LED_Out_Pin 25 //Set the led to be output
#define VR_In_Pin 34 //Set VR to be input
int VRvalue; // Set the value of VR
int fadevalue;

void setup()
{
  // Initialize serial port
  Serial.begin(115200);

  // Set pins
  pinMode(LED_Out_Pin, OUTPUT);
  pinMode(VR_In_Pin, INPUT);
}

void loop()
{
  // Reading
  VRvalue = analogRead(VR_In_Pin);

  // Display
  Serial.print("Raw Sensor reading: ");
  Serial.println(VRvalue);

  //Set when voltage is, the LED flashes frequency is
  fadevalue = map(VRvalue, 0, 1023 , 0, 255);
  analogWrite(LED_Out_Pin, fadevalue);

  delay(1000);
  }