Alarm Power Supply

This Power Supply is suitable for the Modular Burglar Alarm. However, it has other applications. It is designed to provide an output of 12-volts, with a current of up to 1-amp. In the event of mains failure, the back-up battery takes over automatically. When the mains is restored, the battery recharges. Use a genuine alarm type back-up battery. They are maintenance-free, and their terminals can be held at 13v8 for many years, with no ill effects. A smaller or larger capacity battery may be used, without circuit modification.

The Power Supply circuit is engineered to deliver a stable 12V output, capable of supplying a maximum current of 1A, making it suitable for powering various electronic devices, particularly a modular burglar alarm system. The design incorporates a transformer, rectifier, and voltage regulator to ensure that the output voltage remains consistent under varying load conditions.

In the event of a mains power failure, the circuit seamlessly transitions to a backup battery system. This automatic switchover is facilitated by a relay or a similar switching mechanism that detects the absence of mains voltage and connects the battery to the output. The use of a genuine alarm-type backup battery is recommended due to its maintenance-free characteristics and ability to sustain a terminal voltage of approximately 13.8V over extended periods without degradation.

Upon restoration of mains power, the circuit is designed to initiate a charging process for the backup battery. This is typically accomplished through a dedicated charging circuit that regulates the current and voltage supplied to the battery, ensuring safe and efficient recharging. The charging circuit is configured to prevent overcharging, which can damage the battery.

The flexibility of the design allows for the use of different battery capacities without necessitating modifications to the circuit. This feature provides versatility, accommodating various power requirements based on the specific application or system configuration. The overall design prioritizes reliability and longevity, crucial for alarm systems that require uninterrupted power supply to maintain operational integrity.This Power Supply is suitable for the Modular Burglar Alarm. However, it has other applications. It is designed to provide an output of 12-volts, with a current of up to 1-amp. In the event of mains failure, the back-up battery takes over automatically. When the mains is restored, the battery recharges. Use a genuine alarm type back-up battery. They are maintenance-free, and their terminals can be held at 13v8 for many years, with no ill effects. A smaller or larger capacity battery may be used, without circuit modification. 🔗 External reference