How can I build a siren when my UPS detects a power cut? Answered
Alright, I have a large server set-up in my closet, and just recently I had a power cut, which, if not for my backups, I would have lost everything (photos, videos, documents, my soul etc.)
The problem was it was in the middle of the night, and the UPS (for some reason) didn't shut down the server when the battery drained. So I want to design a system where if the UPS is tripped, some sort of siren or flashing light goes off, so if I'm asleep, I can get up and safely power down everything.