Good day My senior colleagues, I designed a circuit to sound an alarm when mains goes off an sound Good day My senior colleagues, I designed a circuit to sound an alarm when mains goes off an sound ...

Article 760 covers the installation of wiring and equipment of fire alarm systems including all circuits controlled and powered by the fire alarm system. Article 760 covers the installation of wiring ...

Here is a simple power resumption alarm circuit that can be fixed inside the switch box itself. It gives beeps when the power resumes after a power failure. This circuit is ideal to monitor battery ...

Normally, the fire alarm initiating device, notification appliance and signaling line circuits are not run outside the building. When we have no choice but to run them overhead or underground, ...