shed garage alarm
The single-zone burglar alarm circuit is designed to provide effective security with minimal power consumption. It operates by detecting unauthorized entry into a designated area. The circuit typically incorporates a passive infrared (PIR) sensor or a magnetic reed switch that triggers the alarm when movement or breach is detected.
The automatic exit and entry delays are crucial features that allow users to arm and disarm the system without triggering the alarm. The exit delay provides a set amount of time for the user to leave the area, while the entry delay allows for re-entry without immediate alarm activation, providing a grace period for disarming the system.
The optional siren cut-off timer is another significant feature, allowing the alarm to sound for a predetermined duration before automatically silencing. This can help prevent unnecessary disturbances and battery drain while still ensuring that an alert is raised during an intrusion.
The circuit's low standby current is essential for battery-powered applications, as it extends the operational life of the system. This is particularly important in remote locations where frequent battery replacements may not be feasible.
In terms of implementation, the circuit can be designed using discrete components such as resistors, capacitors, and transistors, or it can utilize integrated circuits for a more compact solution. The choice of components will depend on the desired features, cost, and available space for installation.
Overall, this burglar alarm circuit is a versatile and efficient solution for enhancing security in various settings where conventional mains-powered systems are impractical.This is a basic single-zone burglar alarm circuit. Its features include automatic Exit and Entry delays - and an optional Siren Cut-Off timer. It has an extremely small standby current. This makes it ideal for battery-powered operation. Use it in your caravan, mobile home, lock-up, or anywhere mains power is not available.. 🔗 External reference
Related Circuits
The circuit detects a sudden shadow on the light sensor and activates a bleeper when this occurs. It is designed to ignore gradual changes in brightness to prevent false alarms. The bleeper operates for a brief duration to conserve...
The circuit operates using the MQK-2 gas sensor, which detects the presence of combustible gases or smoke through surface adsorption. When gas is detected, the inter-electrode resistance (BL) decreases significantly. This change in resistance affects the voltage at node...
The circuit is designed to ensure that the headlights or side lights are automatically switched off after the ignition contact is turned off. This prevents the occurrence of a dead battery due to headlights being inadvertently left on. The circuit...
The circuit includes automatic exit and entry delays, a timed bell cut-off, and a system reset feature. It accommodates both normally-open and normally-closed switches, making it compatible with standard input devices such as pressure mats, magnetic reed contacts, foil...
When using a lamp with a motion sensor for outdoor lighting, the original electrical switch is no longer required. By replacing the switch with the described circuit, an acoustic signal will be generated each time the outdoor lamp is...
This cost-effective burglar alarm utilizes a 12V strobe light and a truck reversing horn as the visual and audible alarm outputs. The alarm mechanism consists of a 12V horn relay and several pressure mat switches. This straightforward design ensures...