LOCKEABLE ALARM

A lockable alarm is a versatile security device that combines the physical security of a lock with the auditory alert capabilities of an alarm. This integration significantly enhances the protection of personal and commercial properties by providing both a deterrent and an immediate response to unauthorized access attempts. This device is especially useful for securing doors, windows, lockers, cabinets, and other areas where high security is a priority.

Key Features:

1. Physical Lock:
   • Provides a robust physical barrier against unauthorized access.
   • Can be designed with various locking mechanisms, including key locks, combination locks, or electronic locks.
2. Alarm System:
   • An audible alarm is triggered by unauthorized access attempts or tampering.
   • Typically powered by batteries or a rechargeable power source.
   • The alarm’s volume is sufficiently loud to deter intruders and alert nearby individuals.
3. Tamper Detection:
   • Sensors detect tampering attempts, such as cutting, drilling, or prying.
   • The alarm is activated not only by unauthorized unlocking but also by attempts to physically damage the device.
4. Optional Features:
   • Remote Notifications: Some advanced models can send notifications to a smartphone or security system when the alarm is triggered.
   • Integrated Motion Sensors: Detect movement around the secured area to provide an additional layer of security.
   • Smart Connectivity: Integration with smart home systems for remote monitoring and control.

Working Principle:

1. Lock Mechanism:
   • The device is securely locked using a physical mechanism. In electronic models, a code or biometric verification might be required.
   • Once locked, the alarm system is armed and ready to detect any unauthorized activity.
2. Alarm Activation:
   • If an attempt is made to unlock the device without proper authorization, the alarm is immediately triggered.
   • Tamper detection sensors ensure that any physical attempts to damage the lock also trigger the alarm.
3. Response:
   • The loud audible alarm deters the intruder and alerts nearby individuals to the security breach.
   • In models with remote notifications, an alert is sent to the owner’s smartphone or a connected security system.

// Define pins
const int forceSensorPin = A0; // Analog pin connected to the force sensor
const int buzzerPin = 9;       // Digital pin connected to the buzzer

// Threshold value for detecting force
const int threshold = 300;     // Adjust this value based on your sensor and desired sensitivity

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);
  
  // Set pin modes
  pinMode(forceSensorPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  // Read the value from the force sensor
  int sensorValue = analogRead(forceSensorPin);
  
  // Print the sensor value to the serial monitor for debugging
  Serial.print("Force Sensor Value: ");
  Serial.println(sensorValue);
  
  // Check if the sensor value exceeds the threshold
  if (sensorValue > threshold) {
    // If so, activate the buzzer
    digitalWrite(buzzerPin, HIGH);
  } else {
    // Otherwise, turn off the buzzer
    digitalWrite(buzzerPin, LOW);
  }
  
  // Small delay to avoid overwhelming the serial monitor
  delay(100);
}