one time only burglar alarm

When this alarm is activated, its siren will sound once for up to 20 minutes. After this period, it will switch off and remain off. The basic circuit features a single zone with independently adjustable exit and entry delays, which is sufficient for many applications. Additionally, there is a range of expansion modules available, allowing the integration of multiple instant zones, tamper zones, and personal attack zones into the system.

The alarm system operates on a straightforward principle, utilizing a microcontroller to manage the timing and activation of the siren. Upon activation, the microcontroller initiates a timer for 20 minutes, during which the siren emits a loud sound to alert nearby individuals. The exit and entry delays can be adjusted through potentiometers, enabling customization based on user preference and security requirements.

The basic circuit includes a single zone input, which can be connected to various sensors such as door contacts, motion detectors, or glass break sensors. When any of these sensors are triggered, the microcontroller activates the siren. The system's design allows for a simple installation and setup, making it suitable for residential and small commercial applications.

For enhanced security, the expansion modules can be integrated into the system. These modules enable the addition of instant zones, which provide immediate alerts upon sensor activation, tamper zones that detect unauthorized access to the system components, and personal attack zones that can be triggered manually for emergency situations. Each of these zones can be configured to operate independently, allowing for a tailored security solution that meets diverse needs.

Overall, this alarm system is designed for flexibility and scalability, making it a robust option for users seeking to enhance their security measures while maintaining ease of use and installation.When this alarm is activated its Siren will sound once - for up to 20-minutes. Then it will switch off and remain off. The basic circuit has a single zone with independently adjustable Exit and Entry delays. This will be adequate in many situations. However, there`s also a range of Expansion Modules. These will allow you to add any number of Instant Zones, Tamper Zones and Personal Attack Zones to your system.. 🔗 External reference