Cashbox or Locker Alarm
The locker alarm circuit utilizes a reed switch that acts as a magnetic sensor. When the locker or cashbox door is closed, a magnet positioned near the reed switch keeps it in a closed state, allowing the circuit to remain inactive. In the event of unauthorized access, if the door is opened and the magnet moves away from the reed switch, the switch will open, triggering the alarm.
The heart of the circuit is an electromagnetic relay, which is used to drive the alarm system. The relay is connected in such a way that when the reed switch opens, it energizes the relay coil, closing the relay contacts. This action can activate various alarm systems, such as a siren or a flashing light, providing a clear indication of unauthorized access.
Powering this circuit with a 12V DC supply ensures that it can operate efficiently while providing adequate power to the relay and alarm components. It is crucial to select a relay that can handle the load of the intended alarm system to prevent damage to the components.
For enhanced functionality, additional features can be integrated into the circuit, such as a delay timer to prevent false alarms or a secondary notification system that alerts the owner via a mobile device or a landline. Proper enclosure of the circuit is essential to protect it from environmental factors and tampering, ensuring reliable operation in various conditions.
Overall, the locker alarm circuit is a practical solution for protecting valuable items from theft, combining simplicity with effectiveness in design.The locker alarm circuit or cashbox watcher can be used to protect a cashbox/locker from unauthorised access. This tried and tested design forms a fool-proof,remotely operated alarm/electromagnetic relay driver that receives its control signal from a standard reed switch.
The circuit works off a 12V dc power supply.After construction, enclose the whole circu.. 🔗 External reference
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