enhanced shed garage alarm
The enhanced Garage/Shed Alarm circuit is designed to provide reliable security for outdoor structures. The core functionality is governed by a microcontroller that manages the timing sequences for entry and exit delays, ensuring that users have adequate time to disarm the system upon entering or exiting the premises. The extended delay of approximately 30 seconds is particularly useful for users who may need more time to access their keys or disable the alarm.
The alarm system employs a passive infrared (PIR) motion sensor to detect unauthorized entry. When motion is detected, the microcontroller activates the entry buzzer, which serves as an immediate alert to the presence of an intruder. This buzzer replaces the traditional LED indicator, providing a more audible warning that can be heard from a greater distance.
To prevent false alarms, the timed siren cut-off feature is implemented. After a predefined duration, typically set to a few minutes, the siren will automatically deactivate if no further motion is detected. This feature not only conserves battery life but also reduces the likelihood of nuisance alarms that could occur due to environmental factors such as animals or wind.
In addition, the automatic reset functionality ensures that the system returns to its armed state after the siren has been cut off. This is particularly advantageous in scenarios where the user may forget to rearm the system after an alarm event. The microcontroller monitors the state of the system and resets it automatically, maintaining the security of the garage or shed without requiring manual intervention.
Overall, the enhancements made to this Garage/Shed Alarm system significantly improve its usability and effectiveness, making it suitable for a wider variety of applications, including residential garages, tool sheds, and storage units. The combination of extended delays, audible alerts, and automatic features creates a robust security solution for users seeking peace of mind regarding the safety of their property.This is an enhanced version of the simple Garage/Shed Alarm. The Entry and Exit delays have been increased to about 30-seconds - and I`ve added a timed Siren cut-off and automatic Reset. I`ve also replaced the LED with an entry Buzzer. These enhancements mean that the new version will have a much wider application.. 🔗 External reference
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