const int receiverPin = A0;  // IR receiver or button input
const int ledPin = 12;       // LED output pin

bool ledState = false;       // Current state of the LED
bool lastButtonState = LOW;  // Previous button state
bool currentButtonState;

void setup() {
  pinMode(ledPin, OUTPUT);       // Set LED pin as output
  pinMode(receiverPin, INPUT);   // Set receiver pin as input
}

void loop() {
  currentButtonState = digitalRead(receiverPin);

  // Detect rising edge: LOW -> HIGH
  if (currentButtonState == HIGH && lastButtonState == LOW) {
    ledState = !ledState;  // Toggle LED state
    digitalWrite(ledPin, ledState ? HIGH : LOW);
    delay(200); // Debounce delay to prevent bouncing
  }

  lastButtonState = currentButtonState;
}