💣 C4 - Button & Buzzer Timer

The C4 - Button & Buzzer Timer is an Arduino project that simulates a countdown timer. When a button is pressed, it starts counting up to 10 seconds. If the button remains pressed for 10 seconds, the buzzer activates. If the button is released, the countdown resets.

📸 Circuit Diagram

Connect the components as follows:

• Button → Digital Pin 2
• Passive Buzzer → Digital Pin 3
• Resistor (10kΩ) → Pull-down for button
• Arduino Board (e.g., Arduino Uno)

🔧 Features

✅ Countdown Timer: Increments every second while the button is held. ✅ Buzzer Activation: Sounds when 10 seconds are reached. ✅ Auto Reset: Releasing the button resets the countdown. ✅ Serial Monitor Output: Displays countdown progress.

🚀 How It Works

1. Press & Hold the Button: The timer starts counting.
2. Monitor the Serial Output: Each second is printed.
3. At 10 Seconds: The buzzer turns on.
4. Release the Button: The timer resets, and the buzzer stops.

📜 Code

#define BUTTON 2
#define BUZZER 3
#define TIME 1000

void setup() {
  Serial.begin(9600);
  pinMode(BUTTON, INPUT_PULLUP);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  int i = 0;

  while (digitalRead(BUTTON) == LOW) {
    i++;
    Serial.print("You have pressed the button for: ");
    Serial.println(i);
    delay(TIME);
    
    if (i == 10) {
      Serial.println("You have pressed it for 10 seconds **BOOM**");
      tone(BUZZER, 1000);
    }
  }
  noTone(BUZZER);
}

📢 Notes

• Use INPUT_PULLUP to avoid floating input issues.
• Adjust the delay(TIME) if you need a different timing.
• The tone() function activates the buzzer at 1kHz.
• Ensure the button is wired correctly (pull-down resistor recommended).

🔥 Have fun with your C4 countdown simulation! 🔥