The original post: /r/diy by /u/i_hate_usernames13 on 2024-11-10 14:11:31.

I have a standard 24v doorbell transformer but I removed it and now my doorbell is 5v. I want to install one of those nest or ring doorbells that need the 24v (no I’m not gonna do a battery version).

So the reason I have it on 5v is my ringer is an old school secondary phone ringer for a shop to be heard over other noises. So obviously it needed the special power and whatnot. It currently runs off a USB 5v power. Power the ringer via Black Magic Telephone Ringing Generator Square Wave.

I’m not entirely sure how a relay works but could I wire something up so there is 24v at the push button outside and when pushed that then trips a relay and causes the 5v to go to the ringer?